# Empirical strong-line oxygen abundance calibrations from galaxies with electron-temperature measurements

S. Y. Yin, Y. C. Liang, F. Hammer, J. Brinchmann, B. Zhang, L. C. Deng, H. Flores

► To cite this version:

S. Y. Yin, Y. C. Liang, F. Hammer, J. Brinchmann, B. Zhang, et al., Empirical strong-line oxygen abundance calibrations from galaxies with electron-temperature measurements. Astronomy and Astrophysics - A&A, 2007, 462, pp.535-546. 10.1051/0004-6361:20065798. hal-03566262

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<figure><img src="image_1.png" /></figure>

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# Empirical strong-line oxygen abundance calibrations from galaxies with electron-temperature measurements*

S. Y. Yin<sup>1,3</sup>, Y. C. Liang<sup>1,2</sup>, F. Hammer<sup>2</sup>, J. Brinchmann<sup>4</sup>, B. Zhang<sup>1,3</sup>, L. C. Deng<sup>1</sup>, and H. Flores<sup>2</sup>

Received 10 June 2006 / Accepted 27 September 2006

## ABSTRACT

**Aims.** Our aims are to estimate the validity of empirical methods, such as $R_{23}$, $R_{23} - P$, $\log([N\ \text{II}]/H\alpha)$ (N2), $\log([([O\ \text{III}]/H\beta)]/[N\ \text{II}]/H\alpha)$ (O3N2), and $\log([\text{S\ II}]/H\alpha)$ (S2), and to re-derive (or add) the calibrations of $R_{23}$, N2, O3N2, and S2 indices for oxygen abundances on the basis of a large sample of galaxies with $T_e$-based abundances.

**Methods.** We determined the gas-phase oxygen abundance for a sample of 695 galaxies and H II regions with reliable detections of [O III]4363, using the reliable and direct temperature-sensitive ($T_e$) method of measuring metallicity. We selected 531 star-forming galaxies from the SDSS-DR4 database with strong emission lines, including [O III]4363 detected at a signal-to-noise ratio higher than 5$\sigma$, as well as 164 galaxies and H II regions from the literature with $T_e$ measurements. The O/H abundances were derived from a two-zone model for the temperature structure, assuming a relationship between high ionization and low ionization species.

**Results.** We compare our (O/H)$T_e$ measurements of the SDSS sample with the abundances obtained by the MPA/JHU group who used multiple strong emission lines and Bayesian techniques (Tremonti et al. 2004). For roughly half of the sample the Bayesian abundances are overestimated ~0.34 dex, possibly due to the treatment of nitrogen enrichment in the models they used. The $R_{23}$ and $R_{23} - P$ methods systematically overestimate the O/H abundance by a factor of ~0.20 dex and ~0.06 dex, respectively. The N2 index, rather than the O3N2 index, provides more consistent O/H abundances with the $T_e$-method, but with some scatter. The relations of N2, O3N2, and S2 with log(O/H) are consistent with the photoionization model calculations of Kewley & Doptita (2002), but $R_{23}$ does not match well. We derive analytical calibrations for O/H from $R_{23}$, N2, O3N2, and S2 indices on the basis of this large sample, including the excitation parameter P as an additional parameter in the N2 calibration. These empirical calibrations are free of the systematic problems inherent in abundance calibrations based on photoionization models.

**Conclusions.** We conclude that the N2, O3N2, and S2 indices are useful indicators for calibrating metallicities of galaxies with 12 + log(O/H) < 8.5 and that the $R_{23}$ index works well for the metal-poor galaxies with 12+log(O/H) < 7.9. For the intermediate metallicity range (7.9 < 12 + log(O/H) < 8.4), the $R_{23}$ and $R_{23} - P$ methods are unreliable for characterizing the O/H abundances,

**Key words.** galaxies: abundances – galaxies: evolution – galaxies: ISM – galaxies: spiral – galaxies: starburst – galaxies: stellar content

## 1. Introduction

The chemical properties of stars and gas within a galaxy provide both a fossil record of its star formation history and information on its present evolutionary status. It is therefore desirable to extract as much accurate information as possible from observations of galaxies. In particular, it is important that different methods of extracting information provide this without systematic offsets or, at the very least, that these systematic offsets are understood well. Accurate abundance measurements for the ionized gas in galaxies require the determination of the electron temperature ($T_e$) in this gas, which is usually obtained from the ratio of auroral to nebular line intensities, such as [O III]$\lambda$4959, 5007/[O III]$\lambda$4363. This is generally known as the “direct $T_e$-method” because the electron temperature is directly inferred from observed line ratios. It is well known that this procedure is difficult to carry out for metal-rich

galaxies since, as the metallicity increases, the electron temperature decreases (as the cooling is via metal lines), and the auroral lines eventually become too faint to measure. Instead, the most common method used for estimating oxygen abundance of metal-rich galaxies (12+log(O/H) ≥ 8.5) uses the $R_{23}$ (=[[O II]$\lambda$3727+[O III]$\lambda$4959,5007]/Hβ) parameter, which is the ratio of the flux in the strong optical oxygen lines to that of Hβ (Pagel et al. 1979; Tremonti et al. 2004 and the references therein). The $R_{23}$ indicator can also be used for metal-poor galaxies (12+log(O/H) < 8.5) (Skillman et al. 1989; Kobulnicky et al. 1999; McGaugh 1991; Pilyugin 2000; Edmunds & Pagel 1984).

Several researchers have found, however, that $R_{23}$-derived abundances are inconsistent with the $T_e$-derived ones, showing a systematic offset. For example, Kennicutt et al. (2003) found that $R_{23}$ overestimates the actual log(O/H) abundance by a factor of 0.2–0.5 dex using a sample of 20 H II regions in M 101 with high-S/N spectra. Some other research found similar results, for example, Bresolin et al. (2004, 2005), Garnett et al. (2004a,b), Pilyugin (2006), Shi et al. (2005, 2006). A much larger dataset

<footnote n="1">¹ National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, PR China
e-mail: [syyin;ycliang]@bao.ac.cn</footnote>

<footnote n="2">² GEPI, Observatoire de Paris-Meudon, 92195 Meudon, France</footnote>

<footnote n="3">³ Department of Physics, Hebei Normal University, Shijiazhuang 050016, PR China</footnote>

<footnote n="4">⁴ CAUP, Rua das Estrelas S/N, 4150-752 Porto, Portugal</footnote>

<footnote>* Table 1 is only available in electronic form at http://www.aanda.org</footnote>
can help to understand this effect better, as well extending it to galaxies.

To estimate abundances of galaxies, when $T_e$ and $R_{23}$ cannot be used, some other metallicity-sensitive “strong-line” ratios are very useful, for example, [N II]λ6583/Hα, [O III]λ5007/[N II]λ6583, [N II]λ6583/[O II]λ3727, [N II]λ6583/[S II]λ6717,6731, [S II]λ6717,6731/Hα, and [O III]λ4959,5007/Hβ (Liang et al. 2006; Nagao et al. 2006; Pérez-Montero & Díaz 2005; Pettini & Pagel 2004, hereafter PP04; Denicoló et al. 2002, hereafter D02; Kewley & Dopita 2002, hereafter KD02). Even when $R_{23}$ is available, some of these line-ratios are useful for overcoming the well-known problem that the $R_{23}$ vs. 12 + logO/H relation is double-valued, and further information is required to break this degeneracy. Alternative methods of breaking the degeneracy when a well-established luminosity-metallicity relation exists or when the likelihood of each branch can be calculated, which is discussed by Lamareille et al. (2006).

Strong-line abundance indicators are typically calibrated in one of two ways: (1) using the samples of galaxies with direct ($T_e$-based) abundances (e.g. PP04; Pagel et al. 1979, etc.) or (2) using photoionization models (e.g. McGaugh 1991; Tremonti et al. 2004, etc.). Since the $T_e$-method is generally thought to be the most accurate method for metallicity estimation, we will take oxygen abundances derived using this method as our baseline. We selected a large sample of 531 galaxies from the Fourth Data Release of the Sloan Digital Sky Survey database (SDSS-DR4) with their [O III]λ4363 emission line detected at an S/N higher than 5σ and 164 associated galaxies and H II regions from the literature. We compared their $T_e$-based O/H abundances with the Bayesian estimates provided by the MPA/JHU group (shown as log(O/H)$_{Bay}$), which were obtained by fitting multi-emission lines using the photoionization models of Charlot et al. (2006), and with those derived from some strong-line ratios given in previous studies, including $R_{23}$, P, N2, O3N2 methods, etc. (Kobulnicky et al. 1999; Pilyugin 2001; PP04). We also compared the observational results with the photoionization model results of KD02 for the relations of O/H vs. $R_{23}$, N2, O3N2 and S2 indices.

Our particular concern in this study is the abundance calibrations of strong-line ratios on the basis of their $T_e$-based metallicities. When we compare the observational relations of O/H vs. strong-line ratios with the photoionization model results of KD02, we find that only the N2, O3N2, S2 indices are useful for estimating abundances for galaxies with low metallicity, 12+log(O/H)$_{T_e}$ < 8.5, while other line ratios, such as [N II]/[O II], [N II]/[S II], and [O III]/Hβ are not good indicators for this metallicity range due to their insensitivity to metallicities there, except in the extremely metal-poor environments (e.g. 12+log(O/H) < 7.5 or 7.0) (Stasińska 2002; KD02). The value of $R_{23}$ is a useful indicator of metallicity for the low metallicity region with 12+log(O/H) < 7.9. Thus, we will only calibrate the relationships of the $R_{23}$, N2, O3N2, and S2 indices to O/H abundances from the observational data in this study. Moreover, for the N2 index, we follow Pilyugin (2000, 2001a,b) to add the excitation parameter P (=[O III]/([O II]+[O III])) to separate the sample galaxies into three sub-samples in the calibrations. These calibrations can be the extension of the metal-rich region studied by Liang et al. (2006) to the low-metallicity region.

This paper is organized as follows. The sample selection criteria are described in Sect. 2. The determinations of the oxygen abundances from $T_e$ are presented in Sect. 3. In Sect. 4, we present the comparisons between the (O/H)$_{T_e}$ and the (O/H)$_{Bay}$, as well as those abundances derived from other strong-line

relations. Section 5 shows the comparison of the observational data with the photoionization models of KD02. In Sect. 6, we derive analytical calibrations between O/H and $R_{23}$, N2, O3N2, S2 indices, as well the two-parameter calibrations for the N2 index with the P-parameter included. The conclusions are given in Sect. 7.

## 2. Observational data

We selected 531 galaxies from the SDSS-DR4 (Adelman-McCarthy et al. 2006) and gathered 164 low-metallicity H II regions and galaxies from the literature in this study.

### 2.1. The SDSS-DR4 data

The SDSS-DR4 provides spectra in the wavelength range ~3800–9200 Å for >500 000 galaxies over 4783 square degrees<fnref n="1" />. The MPA-JHU collaboration has in addition measured emission-line fluxes and some derived physical parameters for a sample of 520 082 unique galaxies at the MPA SDSS website<fnref n="2" />. Therefore, we call the working sample selected in this study as the “MPA/JHU sample” hereafter. We have selected the “star-forming galaxies” with metallicity measurements and identified them following the selection criteria of the traditional line diagnostic diagram [N II]/Hα vs. [O III]/Hβ (Baldwin et al. 1981; Veilleux & Osterbrock 1987; Kewley et al. 2001; Kauffmann et al. 2003). The fluxes of emission-lines were measured from the stellar-feature-subtracted spectra with the spectral population synthesis code of Bruzual & Charlot (2003; Brinchmann et al. 2004; Tremonti et al. 2004).

We selected the galaxies with redshifts 0.03 < z < 0.25 to make certain to cover from [O II] to Hα and [S II] emission lines. Tremonti et al. (2004) also discuss the weak effect of aperture on estimated metallicities of the sample galaxies with 0.03 < z < 0.25, and this was discussed further by Kewley et al. (2005), but for the present study the aperture effects are unimportant.

In this study, we used the $T_e$-method to derive O/H abundances of the sample galaxies (see Sect. 3 for details); therefore, we selected the samples with the [O III]λ4363 emission-line detected where the S/N is higher than 5σ. To be consistent with Liang et al. (2006) and Tremonti et al. (2004), we also considered the objects with measured fluxes of [O II]λ3726,3729, [O III]λ5007, Hβ, Hα, [N II]λ6583, [S II]λ6717, 6731 emission lines, and the S/N of Hβ, Hα, [N II], [S II] are larger than 5σ. The final sample consists of 531 galaxies. These have fluxes in [O III]λ4363 greater than 5.3×10⁻¹⁷ erg s⁻<fnref n="1" /> cm⁻<fnref n="2" />, with a mean value of 21.27 × 10⁻¹⁷ erg s⁻<fnref n="1" /> cm⁻<fnref n="2" />.

The fluxes of the emission lines are corrected for dust extinction, which are estimated using the Balmer-line ratio Hα/Hβ, and assuming case B recombination, with a density of 100 cm⁻³ and a temperature of 10⁴ K, and the intrinsic ratio of Hα/Hβ is 2.86 (Osterbrock 1989), with the relation of $(H\alpha/H\beta)_{obs} = (H\alpha/H_{g0})_{intr}10^{-c(f(H\alpha)-f(H\beta))}$. Using the average interstellar extinction law given by Osterbrock (1989), we have $f(H\alpha) - f(H\beta) = -0.37$. For the 56 data points with c < 0, we assume they have c = 0 since their intrinsic Hα/Hβ may be lower than 2.86 if their electron temperature is high (Osterbrock 1989, p. 80).

Nearly all previous empirical oxygen abundance calibrations were derived from individual H II regions since it is much easier

<footnote n="1">¹ http://www.sdss.org/dr4/</footnote>

<footnote n="2">² http://www.mpa-garching.mpg.de/SDSS/</footnote>
to detect [O III]4363 that way. In contrast, the SDSS data samples the inner few kpc of most galaxies. One question is whether the global spectrum from a mixture of different H II regions will yield meaningful average abundances of the galaxies or not. Kobulnicky et al. (1999), Moustakas & Kennicutt (2006), and Pilyugin et al. (2004) all conclude that the spatially unresolved emission-line spectra can reliably indicate the chemical properties of distant star-forming galaxies. However, as Kobulnicky et al. (1999) mention, the standard nebular chemical abundance measurement methods may be subject to small systematic errors when the observed volume includes a mixture of gas with diverse temperatures, ionization parameters, and metallicities. For the low-mass, metal-poor galaxies, such as those we are studying in this work, standard chemical analyses using global spectra will overestimate the electron temperatures $T_e$ due to the non-uniform $T_e$ and large variations in the ionization parameter since the global spectra are biased toward the objects with stronger emission lines. As a result, the oxygen abundances derived from $T_e$ will be underestimated, i.e. about <0.1 dex in log(O/H) (for more massive metal-rich galaxies like local spiral galaxies, there is about ±0.2 dex discrepancy). However, since this bias is small, and not well-constrained for our dataset, we do not attempt to correct for it.

## 2.2. The metal-poor galaxies from the literature

In addition to the MPA/JHU samples, we also collected 164 low-metallicity samples including some blue compact galaxies (BCDs) and H II regions from the literature, which were taken from Izotov et al. (1994, 1996, 1997a,b, 1999, 2001a,b, 2004), Izotov & Thuan (1998a,b, 1999, 2004), van Zee (2000), Kniazev et al. (2000), Vilchez et al. (2003), Guseva et al. (2003a,b,c), Melbourne et al. (2004), and Lee et al. (2004). There are 110 H II regions and 54 galaxies in this sample.

We re-estimated their O/H abundances by using the electronic temperatures method given in Sect. 3. Their metallicities are $7.1 < 12+\log(O/H) < 8.4$, more metal-poor than the SDSS galaxies generally. To check if there is systematic difference between our estimates and the values given in the previous studies, we compared their $T_e$-based oxygen abundances obtained by us with those $T_e$-based given in the original reference in Fig. 1, which shows that they are very consistent, and the very slight difference may come from different atomic data.

## 3. Abundance determination from $T_e$

A two-zone model for the temperature structure within the H II region was adopted. In this model, $T_e([O III])$ is taken to represent the temperature for high-ionization species such as $O^{++}$, while $T_e([O II])$ is used for low-ionization species such as $O^+$. The general method is first to derive $t_3$ ($=10^{-4}T_e([O III])$) from the emission-line ratio of [O III]4959,5007/[O III]4363 and then to estimate $t_2$ ($=10^{-4}T_e([O II])$) from an analytical relation between $t_2$ and $t_3$ inferred from photoionization calculations.

Izotov et al. (2006) published a set of equations for the determination of the oxygen abundances in H II regions for a five-level atom. They used the atomic data from the references listed in Stasińska (2005). According to those authors, the electron temperature $t_3$ (in units of $10^4$ K) and the ionic abundances $O^{++}/H^+$ and $O^+/H^+$ are estimated as follows:

$$t_3 = \frac{1.432}{\log((\lambda4959 + \lambda5007)/\lambda4363) - \log C_T}, \quad (1)$$

<figure><img src="image_2.png" /><figcaption>Fig. 1. Comparison between the $T_e$-based oxygen abundances (this work) and those from the literature.</figcaption></figure>

where

$$C_T = (8.44 - 1.09t_3 + 0.5t_3^2 - 0.08t_3^3) \frac{1 + 0.0004x_3}{1 + 0.044x_3}, \quad (2)$$

with $x_3 = 10^{-4}n_e t_3^{-1/2}$, and $n_e$ is the electron density in cm$^{-3}$. And

$$12 + \log(O^{++}/H^+) = \log(I_{[OIII]\lambda4959+\lambda5007}/I_{H\beta}) + 6.200 + \frac{1.251}{t_3} - 0.55\log t_3 - 0.014t_3, \quad (3)$$

$$12 + \log(O^+/H^+) = \log(I_{[OIII]\lambda3726+\lambda3729}/I_{H\beta}) + 5.961 + \frac{1.676}{t_2} - 0.40 \log t_2 - 0.034t_2 + \log(1 + 1.35x_2), \quad (4)$$

with $x_2 = 10^{-4}n_e t_2^{-1/2}$, and $n_e$ is the electron density in cm$^{-3}$. The total oxygen abundances are then derived from the following equation:

$$\frac{O}{H} = \frac{O^+}{H^+} + \frac{O^{++}}{H^+}. \quad (5)$$

The electron temperature $t_2$ (in units of $10^4$ K) of the low-ionization zone is usually determined from $t_3$ following an equation derived by fitting H II region models. Several versions of this relation of $t_2$ vs. $t_3$ have been proposed. We used the one of Garnett (1992), which has been widely used:

$$t_2 = 0.7t_3 + 0.3. \quad (6)$$

The electron densities in the ionized gas of the galaxies were calculated from the line ratios [S II]λ6717/[S II]λ6731 by using the five-level statistical equilibrium model in the task TEMDEN contained in the IRAF/STSDAS package (de Robertis et al. 1987; Shaw & Dufour 1995), which uses the latest atomic data. A reasonable upper limit of the ratios is 1.431 (Osterbrock 1989). However, we find that 118 out of the 531 SDSS galaxies have [S II] line ratios higher than 1.431. For 71 of the 118 galaxies, the difference between the measured ratio and 1.431 is less than the error in the line ratio, so it is very possible that most of the high [S II]λ6717/[S II]λ6731 ratios come from errors. Therefore,
we adopt 1.431 for these galaxies. Indeed, this approximation
would not affect the ionic abundances much. The reasons are:
the term containing $x_3$ is never important and can be omitted in
calculating $C_T$, since $n_e$ is always smaller than $10^3$ cm$^{-3}$, and
$x_2$ is also insignificant since it is generally less than 0.1 with
$n_e < 10^3$ cm$^{-3}$.

Oxygen abundances of all the 695 samples (531 from SDSS-DR4 and 164 from the literature) were estimated using the relations outlined above. The whole sample mostly shows a metallicity range of 7.1 < 12 + log(O/H)$_{T_e}$ < 8.5. Most of the SDSS-DR4 galaxies lie in the more metal-rich region, i.e., 7.6 < 12 + log(O/H)$_{T_e}$ < 8.5, and only 63 of them have lower metal- licities than 12 + log(O/H)$_{T_e}$ = 8.0. Most of the samples from the literature have lower metallicities, i.e., 12 + log(O/H) < 8.0. The typical uncertainty of the estimates is about 0.044 dex in 12+log(O/H) and about 500 K in $T_e$([O III]). All the data for the SDSS galaxies are given in Table 1.

4. Comparisons between the T<sub>e</sub> and strong-line oxygen abundances

We compare the $T_e$-based O/H abundances of the sample galaxies with the Bayesian oxygen abundances provided by the MPA/JHU group, and those derived from other “strong-line” ratios, such as $R_{23}$, $R_{23} - P$, N2, and O3N2.

4.1. Comparison with the Bayesian metallicities obtained by the MPA/JHU group

The MPA/JHU group used photoionization model (Charlot et al. 2006) to simultaneously fit most prominent emission lines. Based on the Bayesian technique, they have calculated the likelihood distribution of the metallicity of each galaxy in the sample by comparing with a large library of models (~2 × 10⁵) corresponding to different assumptions about the effective gas parameters, and then they adopted the median of the distribution as the best estimate of the galaxy metallicity (Tremonti et al. 2004; Brinchmann et al. 2004).

Very surprisingly, Fig. 2a shows that, for almost half of the sample galaxies (~227), their metallicities are overestimated by a factor of about 0.34 dex on average by using the model of Charlot et al. (2006). There is no obviously monotonic trend between the increasing discrepancy and the weakening [O III]4363 line or the decreasing [O III]4363/Hβ ratio. What is the reason for such obvious difference?

In fact, Charlot’s model was based on Charlot & Longhetti (2001, CL01 hereafter), which is a model for consistently computing the line emission and continuum from galaxies, based on a combination of recent population synthesis and photoionization codes of CLOUDY. What they did is to use a sample of 92 local galaxies as the observed constraints to determine the best model parameters, including metallicity Z, etc. In their calibrations, they used the emission-line luminosities of Hα, Hβ, [O II]λ3727, [O III]λ5007, [N II]λ6583, and [S II]λ6717,6731 emission lines. The main difference between this method and the other strong line methods discussed below is that all the emission lines are used simultaneously so that any clear change in the abundance ratio X/O for any element X from that used in the CL01 models has the potential of causing offsets. In particular, the clear offset between (O/H)_{Bay} and (O/H)_{T_e} is possibly related to how secondary nitrogen enrichment is treated in the CL01 models.

<figure><img src="image_3.png" /></figure>

<figure><img src="image_4.png" /><figcaption>**Fig. 2.** *a)* Comparison between the electron temperature-based oxygen abundances and those Bayesian estimates obtained by the MPA/JHU group. The solid line is the equal-value line, and the long-dashed line represents a +0.34 dex discrepancy from the equal-value line to show the overestimates of the oxygen abundances by using the model of Charlot et al. (2006) for almost half of the sample galaxies. *b)* The offset between the log(O/H)_{Bay} and the log(O/H)_{T_e} as a function of the log(N/O) abundance ratios for the MPA/JHU sample galaxies. The solid line is the linear least-square fit for the relations, given as Eq. (7).</figcaption></figure>

Figure 2b shows that the “offset” between log(O/H)_{Bay} and log(O/H)_{T_e} (the former minus the latter) strongly correlates with the log(N/O) abundance ratio, which can be shown as a linear least-square fit:

$$
\text{offset} = 1.589 \times \log(\text{N/O}) + 2.352, \quad (7)
$$

with an rms of 0.176 dex. The log(N/O) abundance ratios are
obtained from the electron temperature in the [N II] emission
region (equal to the t₂ given in Sect. 3) and the flux ratio of
[N II]λ6548,6584 to [O II]λ3727 following the method given
in Thurston et al. (1996). This means that the overestimates of
CL01 models for the O/H abundances may be related to the onset
of secondary N enrichment. There is a considerable spread in
the onset of N enrichment, so that the assumption of the CL01 models of a single N enrichment trend is too simplistic in this transition region. The simple way to avoid this problem might be to exclude [N II] from their fitting procedure. In this transition region, the relations between the log(N/O) and the log(O/H) of galaxies are not monotonic, unlike the almost constant trend in the low-metallicity region or the increasing trend in the high-metallicity region (see Fig. 8 of Liang et al. 2006).

## 4.2. $R_{23}$ method

Pagel et al. (1979) first proposed the empirical abundance indicator $R_{23}$ for metal-rich galaxies. Skillman et al. (1989) went on to suggest that this indicator can also be used for metal-poor galaxies. The relationship between O/H and $R_{23}$ has been extensively discussed in the literature (see Tremonti et al. (2004) and references therein). Different calibrations will result in slightly different oxygen abundances even for the same branch (see Fig. 3 of Tremonti et al. 2004 for comparison). A few calibrations have attempted to improve the calibration by introducing an empirical estimator of the ionization parameter as a second parameter (e.g. McGaugh 1991; Charlot & Longhetti 2001; KD02 etc.). At present, one of the popular formulas is the calibration given by Kobulnicky et al. (1999), which includes two analytical formulas for the metal-rich and metal-poor branches, respectively, and is derived from the photoionization model of McGaugh (1991).

As mentioned in the introduction, $R_{23}$ may overestimate the actual O/H abundances by a factor of ~0.2–0.5 dex (Kennicutt et al. 2003 etc.). On the basis of this large sample of 695 galaxies, we compare here their oxygen abundances derived from the $R_{23}$ and $T_e$ methods. Figures 3a and 3b show this comparison, where we use the calibration formula of Kobulnicky et al. (1999) to derive the $12+\log(O/H)_{R_{23}}$ for the sample galaxies. In Fig. 3a for the galaxies with $12+\log(O/H)_{T_e} < 7.95$, we use their calibration formula for metal-poor galaxies; and for the galaxies with $12+\log(O/H)_{T_e} \ge 8.2$, we use their formulas for the metal-rich branch. These two metallicity limits are defined following the $R_{23}-P$ method in Sect. 4.3 and some other related studies (Pilyugin 2000, 2001a,b; Shi et al. 2006). Figure 3a shows that the $R_{23}$ method will overestimate the O/H abundances by a factor of ~0.20 dex, which is analogous to what was found by Kennicutt et al. (2003) and Shi et al. (2005, 2006). Detailed discussions of this discrepancy can be found in Kennicutt et al. (2003). For the sample galaxies with $8.0 < 12+\log(O/H)_{T_e} < 8.2$, which are in the turn-over region, the calibration in Kobulnicky et al. (1999) of metal-poor branch gives $(O/H)_{R_{23}}$ good agreement with $(O/H)_{T_e}$. These galaxies are omitted when we discuss the discrepancy between the $T_e$- and $R_{23}$-based metallicities, which is acceptable. Figure 3a does not show any obvious offset between the H II regions and galaxies. Pérez-Montero & Díaz (2005) show that the giant extragalactic H II regions (GEHRs) have more dispersion than the H II galaxies and H II regions in the Galaxy and the Magellanic clouds (their Figs. 1,3,7) since the GEHRs may have different ionization parameters and stellar effective temperatures.

To clearly illustrate the uncertainties due to the double-value of the $R_{23}$-O/H relation, we used both of the calibration formulas for metal-poor and metal-rich branches to calculate the $12+\log(O/H)_{R_{23}}$ abundances for the galaxies having $7.9 < 12+\log(O/H)_{T_e} < 8.4$. Figure 3b gives the results as the points between the two vertical dashed lines, which shows that these two different formulas will result in quite different metallicities, and the discrepancy may be up to ~0.4 dex. Therefore, one should be very careful when using the $R_{23}$-method to

<figure><img src="image_5.png" /><figcaption>**Fig. 3.** Comparison between the $T_e$-based abundances with those derived from other strong-line calibrations: a), b) $R_{23}$ method; c), d) $R_{23}-P$ method; e) N2 method; f) O3N2 method (see text). The small blue points represent the SDSS sample, and the larger magenta points (open circles) represent the sample compiled from the literature. The solid lines are the equal-value lines, and the long-dashed lines in a) and c) are the linear least-square fits to the data points, which show a discrepancy of ~0.20 dex and ~0.06 dex from the equal-value lines, respectively. The two pairs of vertical dashed lines in b) and d) show the range of $7.9 < 12+\log(O/H)_{T_e} < 8.4$ for the samples whose metallicities are estimated from strong-line ratios by using two calibrations for metal-rich and metal-poor branches.</figcaption></figure>

derive the metallicities of the galaxies having metallicities in the turn-over region.

## 4.3. The $R_{23}-P$ method

Pilyugin (2000, 2001a,b) suggests that the $P$ method estimates oxygen abundances of galaxies in which the oxygen abundance can be derived from two parameters, $R_{23}$ and $P$ ($=[\text{O III}]/[\text{O II}]+[\text{O III}]$). Therefore, we call this method the “$R_{23}-P$ method”. They derived the O/H = $f(R_{23}, P)$ formulas from a sample of metal-poor H II regions with $7.1 < 12+\log(O/H)_{T_e} < 7.95$ and a sample of moderately metal-rich H II regions with $8.2 < 12+\log(O/H)_{T_e} < 8.7$. The best fitting relation for metal-poor objects is given as Eq. (4) in Pilyugin (2000), and the one for moderately metal-rich objects is given as Eq. (8) in Pilyugin (2001a).
Figure 3c shows that there is slight difference of ~0.06 dex between the (O/H)$_{T_e}$ and the (O/H)$_{R_{23-P}}$ abundances for the samples. This good agreement is indeed not surprising since Pilyugin (2000, 2001a,b) derived the $R_{23-P}$ method formulas by using a subset of the sample we have used here (Izotov et al. 1994, 1997a; Izotov & Thuan 1998b, 1999). The minor offset is very likely caused for two reasons: (1) our larger sample than the one used by Pilyugin, which allowed us to determine the relations with higher precision; (2) the different $T_e$-formulas and/or atomic data used in calculations. Moreover, for the low excitation samples in the low-metallicity branch with $P < 0.75$, the $R_{23-P}$ method may overpredict their oxygen abundances by a factor ~0.1 dex, which is consistent with the 0.1–0.2 dex overestimates found by van Zee & Haynes (2006) for the low-excitation H II regions in dwarf irregular galaxies.

Pilyugin & Thuran (2005) have renewed the $R_{23-P}$ calibrations by including several improvements, such as enlarging the sample by 1 order of magnitude, etc. We used the new calibrations to re-calculate the (O/H)$_{R_{23-P}}$ abundances for our sample galaxies and found the overestimate factor by the $R_{23-P}$ method decreases to ~0.025 dex.

Because there are no observational samples with $7.95 < 12+\log(O/H) < 8.2$ in Pilyugin’s calibration for the $R_{23-P}$ method, this method cannot provide information for the galaxies within this oxygen abundance range. To understand more about this, we calculated oxygen abundances for galaxies with $12+\log(O/H)_{T_e} = 7.9-8.4$ using the two formulas for the metal-rich and metal-poor branches. The results are indicated in Fig. 3d. Similar to what we saw for $R_{23}$, the two branch calibrations give quite different metallicities with a difference of up to ~0.4 dex. Thus one must be very careful when applying the $R_{23-P}$ method to samples of galaxies with metallicities in the turn-over region.

## 4.4. N2 method

The [N II]/H$\alpha$ emission-line ratio can also be used to estimate the metallicity of galaxies. Nitrogen is mainly synthesized in intermediate- and low-mass stars. The [N II]/H$\alpha$ ratio will therefore become stronger with ongoing star formation and galaxy evolution, until very high metallicities are reached, i.e. $12+\log(O/H) > 9.0$, where [N II] starts to become weaker due to the very low electron temperature caused from strong cooling by metal ions. It is worth pointing out that this ratio gives an indirect measurement of the oxygen abundance, however, since oxygen lines are not used in the method.

Following the earlier work by Storchi-Bergmann et al. (1994), and Raimann et al. (2000), D02 and PP04 suggested calibration relations for O/H vs. N2 index from 236 and 137 galaxies respectively. D02 combined a sample of 128 metal-rich galaxies and 108 metal-poor galaxies with [O III]4363 detected to derive their calibration. The way they estimated the metallicities of their galaxy sample was to use the $T_e$-method for the metal-poor galaxies and the $R_{23}$ or $S_{23}$ (=$\log((\text{[S II]}6717,6731+\text{[S III]}9096,9531))/\text{H}\beta$) method for the metal-rich ones. PP04 extracted the metal-poor objects from the work of D02 and updated the abundances for some of them with recent measurements by Kennicutt et al. (2003) for H II regions in M101 and by Skillman et al. (2003) for dwarf irregular galaxies in the Sculptor Group. To be consistent with the $T_e$-method, here we use the calibration formula given by PP04 to derive the metallicities $12+\log(O/H)_{N2}$ for our 695 sample galaxies. Figure 3e gives the comparison between the $12+\log(O/H)_{T_e}$ and $12+\log(O/H)_{N2}$, which shows that the two

estimates are consistent but have some scatter. The scatter may mostly come from the different ionization parameters of the galaxies and the different samples (see Sect. 6.5).

One of the advantages of using the N2 index for estimating metallicity is that the N2 indicator can break the degeneracy when the $R_{23}$–(O/H) and $(R_{23}, P)$–(O/H) relations are double-valued. Also, the N2 index is not affected by dust extinction since $H\alpha$ and [N II] are so closely spaced in wavelength. Furthermore, near-infrared spectrographs can measure these two lines for galaxies out to high redshifts, where it is equivalent to early epochs in the evolution of galaxies (see more discussion in Liang et al. 2006).

## 4.5. O3N2 method

Another indicator of the metallicity of galaxies is O3N2 (=$\log((\text{[O III]}\lambda5007/H\beta)/([\text{N II}]\lambda6583/H\alpha))$). It was introduced by Alloin et al. (1979) and then studied by PP04, who present one such calibration by doing a linear least-square fit for a sample of 65 (from the 137) galaxies with $-1 < \text{O3N2} < 1.9$, and provide a calibration formula. This calibration does not work for the cases of O3N2 $> 1.9$ since the data points are so scattered there in their study. Figure 3f shows the comparison between the $12+\log(O/H)_{T_e}$ and the oxygen abundances derived with the O3N2 method using the calibration of PP04 for our 695 sample galaxies. But we extrapolated to use the PP04’s calibration to the galaxies with O3N2 $> 1.9$.

It is clear that this calibration will overestimate the O/H abundances by a big factor, up to 1.0 dex, for the metal-poor galaxies with O 3 N 2 > 1.9 (about $12+\log(O/H) < 8.0$). The scatter of the data with $-1 < \text{O3N2} < 1.9$ is 4also large, which may be due to the different ionization parameters of the galaxies.

# 5. Comparisons with photoionization models

KD02 calculated the metallicity calibrations for strong-line ratios on the basis of photoionization models. They used a combination of stellar-population synthesis and photoionization models to develop a set of ionization parameters and abundance diagnostics based on emission-line ratios from strong optical lines, with seven ionization parameters $q = 5 \times 10^6$, $1 \times 10^7$, $2 \times 10^7$, $4 \times 10^7$, $8 \times 10^7$, $1.5 \times 10^8$, and $3 \times 10^8$ cm s$^{-1}$. The ionization parameter $q$ is defined on the inner boundary of the nebula and can be physically interpreted as the maximum velocity of an ionization front that can be driven by the local radiation field. It will be interesting to compare the observational samples with these model results. Figure 4 shows the comparisons for the relations of $12+\log(O/H)$ versus $R_{23}$, N2, O3N2, and S2 indices. These relations are for the $T_e$-based oxygen abundances of the metal-poor galaxies. Liang et al. (2006) shows such relations for the metal-rich SDSS galaxies based on $R_{23}$ abundances, and derived the corresponding calibrations (see Figs. 4b, c).

Figure 4a shows that the significant discrepancy in the theoretically expected $R_{23}$ sequence with respect to the observed trend beginning from $12 + \log(O/H)_{T_e} = 8.0$ to lower metallicities. Nagao et al. (2006) also point this out. The observed relation of $R_{23} - \log(O/H)$ for the data points does not show much scatter in contrast to the models of the lower branch of metallicity, which may mean a weak dependence of $R_{23}$ on ionization parameters there. In particular, the distribution of observational data is nearly vertical in an oxygen abundance range of 7.9 ~ 8.5. The physical reason for the insensitivity of $R_{23}$ to metallicity in this metallicity region is that the [O III]/H$\beta$ ratio (also [O II]/H$\beta$) is
<figure><img src="image_6.png" /><figcaption>**Fig. 4.** Comparison between the observational data and the photoionization models of KD02. The symbols are the same as in Fig. 3. The seven lines represent the model results from KD02 with seven photoionization parameters from $q = 5 \times 10^6$ cm s⁻¹ to $q = 3 \times 10^8$ cm s⁻¹, which increase in an orderly fashion from the red dotted line to the black solid line. The solid thick line (in red) in **a**) is the calibration derived by Tremonti et al. (2004) for the metal-rich galaxies, and those in **b**) and **c**) are the calibrations derived by Liang et al. (2006) for the metal-rich SDSS galaxies.</figcaption></figure>

independent of $T_e$, there hence of metallicity (Stasinska 2002). It proves again that the oxygen abundance cannot be accurately measured by using $R_{23}$ in the metallicity turnover region, but the $R_{23}$ indicator works well for the metal-poor galaxies with $12 + \log(O/H) < 7.9$.

Figure 4b shows the comparison between $12+\log(O/H)$ and the N2 index. It shows that the observational data follow the general trend of the model results closely; namely, the N2 indices of galaxies increase following the increasing metallicities, up to $12+\log(O/H) = 9.0$ (by models and Liang et al. 2006). The observational data show some scatter, which may be due to their different ionization parameters. We also plot the calibration relation derived by Liang et al. (2006) with the metal-rich SDSS galaxies ($8.5 < 12 + \log(O/H) < 9.3$) in Fig. 4b. If we derive a calibration from the $T_e$-based oxygen abundances of the metal-poor galaxies and extrapolate it to the metal-rich region, it will result in relatively lower O/H abundance than when directly using the calibration from metal-rich galaxies. Perhaps one reason for this discrepancy stems from the different methods of determining metallicities of the metal-poor and metal-rich galaxies, i.e. the $T_e$-method versus the $R_{23}$-method, or photoionization models. However, Stasińska (2005) points out that, at high metallicity, the derived O/H values from $T_e$ for model H II regions deviate strongly from the true ones; i.e., important deviations appear around $12 + \log(O/H) = 8.6$ and may become huge as the metallicity increases (see their Fig. 1a).

Figure 4c shows the comparison between $12+\log(O/H)$ and the O3N2 index. The general trend of the observations and of the models is similar and shows increasing O/H abundance with decreasing O3N2 index. However, the large scatter of the data

points in this plot may be due to the strong effect of the ionization parameter, and this effect is stronger in the low-metallicity region ($12+\log(O/H) < 8.5$) than in the high-metallicity region ($12+\log(O/H) > 8.5$). Moreover, O3N2 is much less dependent on metallicity in the low-metallicity region than in the high-metallicity region; in particular, it is almost independent of metallicity for the sample galaxies with metallicities of $12+\log(O/H) = 7.1–7.7$. This is possibly the main reason that PP04 had to limit their calibration to O3N2 < 1.9. We also present the calibration for metal-rich SDSS galaxies obtained by Liang et al. (2006) in Fig. 4c in the $8.5 < 12+\log(O/H) < 9.3$ region. Both the calibrations for the metal-rich and metal-poor sample galaxies are consistent with the general trend of the model predictions, but the calibration for metal-poor galaxies corresponds to relatively higher ionization parameter than the metal-rich galaxies.

Figure 4d shows the comparison between $12+\log(O/H)$ and the S2 index. Both the observations and models clearly show increasing S2 with increasing O/H. This increasing trend will extend up to $12+\log(O/H) \sim 8.9–9.0$, but S2 is affected more by the ionization parameters than the N2 index is. The large scatter of this relation may be caused by the different ionization parameters. Most of the SDSS galaxies cluster around $-1.0 < S2 < -0.5$. Liang et al. (2006) did not derive a metallicity calibration for S2 for the metal-rich galaxies since the data points show obvious turnover and double-valued distribution around $12+\log(O/H) \sim 8.9–9.0$.

In summary, Figs. 4a–d show that $R_{23}$ is not a good metallicity indicator for the galaxies with $7.9 < 12+\log(O/H) < 8.5$ due to its independence of metallicity there, and it is a good indicator of the lower metallicity region with $12+\log(O/H) < 7.9$; N2 is a useful indicator for estimating metallicities of galaxies because it is strongly monotonically correlated with metallicity (up to about $12+\log(O/H) \sim 9.0$); although O3N2 and S2 can be used to estimate metallicities of galaxies, they are more sensitive to ionization parameters than N2 is, and O3N2 is less dependent on metallicity than the other two. In addition, when we have the indicator of O3N2 and/or S2, normally we also have N2. Furthermore, if we can find a way to take the ionization parameters of the sample galaxies into account in the calibrations, it will provide more reliable metallicities (see Sects. 6.5, 6.6).

# 6. Deriving oxygen abundance calibrations

We obtain the $T_e$-based O/H abundances for the 695 sample galaxies and H II region. They mostly have metallicities of $7.1 < 12 + \log(O/H)_{T_e} < 8.5$. Then, in this section, we use their (O/H)$_{T_e}$ and line ratios to re-derive the oxygen abundance calibrations for the N2, O3N2 indices, and add an S2 index. We also derive the calibration for $R_{23}$ for the $12+\log(O/H)_{T_e} < 7.9$ region. Moreover, we try to add an excitation parameter $P (=[O III]/([O II]+[O III]))$ in the calibrations to separate the sample galaxies to be three sub-samples, which improves the N2 calibration, but does not improve the O3N2 and S2 calibrations much.

## 6.1. The $R_{23}$ index

The $R_{23}$ index is useful for calibrating metallicities of low metallicity galaxies with $12+\log(O/H) < 7.9$ due to its obvious correlation with $\log(O/H)$ and weak dependence on ionization parameters there. Figure 5a shows this correlation. The linear
<figure><img src="image_7.png" /><figcaption>Fig. 5. $R_{23}$, N2, O3N2, and S2 indices for oxygen abundance calibrations from the sample galaxies: a) the $R_{23}$ index; b) the N2 index; c) the O3N2 index; d) the S2 index. The small filled points represent the SDSS galaxies and the open squares refer to the samples from the literature. The points with uncertainties larger than 0.06 dex in all these line ratios and log(O/H) abundances have been excluded. The solid line a) refers to the linear least-square fit for all the 120 data points in the figure. The three dashed lines refer to the calibrations given by Kobulnicky et al. (1999) for the three different cases of $y$ (=log([O III]/[O II]). In b), the long-dashed and dotted lines refer to the calibrations of PP04 and D02, respectively. In c), the long-dashed line refers to the calibration of PP04. In b)-d), the 11 large filled circles represent the mean values in each bin of oxygen abundances (see text), and the solid lines are the least-square fits for these mean-value points. The two dashed lines show the $2\sigma$ discrepancy from the fits in all the four panels.</figcaption></figure>

least-square fit for all the 120 data points with $12+\log(O/H) < 7.9$ is

$$12 + \log(O/H) = 6.486 + 1.401 \times \log(R_{23}), \qquad (8)$$

with $R_{23} = ([O \text{ II}]\lambda3727+[O \text{ III}]\lambda4959,5007)/H\beta$. The rms of the data to the fit is about 0.103 dex. The appropriate range of this calibration is about $0.4 < \log(R_{23}) < 1.0$ and $7.0 < 12+\log(O/H) < 7.9$. The calibrations of Kobulnicky et al. (1999) are also presented in the figure for comparison for the cases of $y$ (=log([O III]/[O II])) equal to 0, 1, and 1.5. It shows that the $y = 1.0$ and 1.5 can usually explain these observational data.

## 6.2. The N2 index

Since the data points show a relatively tight linear relationship between N2 and $12+\log(O/H)$, we obtain a linear least-square fit for this relation. We use the mean-value points in 11 bins of metallicities to avoid too much weight in the high metallicity range where most of the data are distributed. The bin width is $\Delta[\log(O/H)] = 0.1$ for the galaxies in the range of $7.4 < 12+\log(O/H) < 8.5$, and $\Delta[\log(O/H)] = 0.3$ for the range of $7.1 < 12+\log(O/H) < 7.4$ because of the small number of sources in this range. These bin widths are the same as for

the O3N2 and S2 indices discussed in the consequent two subsections. The objects with higher uncertainty than 0.06 dex on $\log(O/H)$ and $\log([N \text{ II}]/H\alpha)$ have been excluded in calculating the mean values and calibrating, which leaves 584 data points. Nineteen galaxies from the literature cannot be included in deriving calibrations since they do not have [N II] emission-line measurements. The derived analytical relation of a linear least-square fit is

$$12 + \log(O/H) = 9.263 + 0.836 \times N2, \qquad (9)$$

with $N2 = \log([N \text{ II}]\lambda6583/H\alpha)$, shown in Fig. 5b. The rms of the data to the fit is 0.159 dex. A $2\sigma$ discrepancy is shown by the two dashed lines. This calibration is valid in the range of $-2.5 < N2 < -0.5$. The calibrations of D02 ($12 + \log(O/H) = 9.12 + 0.73 \times N2$) and PP04 ($12 + \log(O/H) = 8.90 + 0.57 \times N2$) are also plotted for comparison. It shows that D02's calibration is similar to ours, but the one of PP04 shows a slightly lower slope and the difference is more obvious for the low metallicity region with $12+\log(O/H) < 8.0$. The reason may be that PP04's sample does not extend to much lower metallicity with $12+\log(O/H) < 7.7$, and most of their samples have metallicities of $7.7 < 12+\log(O/H) < 8.5$, while the fit for their these samples results in a slightly lower slope than for ours (see Fig. 1 of D02 and Fig. 1 of PP04).
## 6.3. The O3N2 index

Figure 5c shows our sample galaxies for their (O/H)$_{T_c}$ abundances versus O3N2 indices. Although they are quite scattered, an obvious trend still exists; i.e., O/H increases following the decreasing O3N2 index. We tried to derive a calibration of O3N2 index for O/H abundances from these sample galaxies. The objects with an higher uncertainty than 0.06 dex on log(O/H) and O3N2 are excluded, which leaves 585 data points. Nineteen objects from the literature without their [N II] emission-line measurements are excluded. The mean-value points within 11 bins are obtained for the left sample galaxies. The bin widths are the same as for the N2 calibration (Sect. 6.2). A two-order polynomial fit is obtained by fitting the mean-value points

$$12 + \log(O/H) = 8.203 + 0.630 \times O3N2 - 0.327 \times O3N2^2, (10)$$

with O3N2 = log([O III]λ5007/Hβ)/[N II] λ6583/Hα), shown in Fig. 5c. The rms of the data to the fit is 0.199 dex. This fit is valid for 1.4 < O3N2 < 3. The 2σ discrepancy is shown by the two dashed lines. The calibration of PP04 (12 + log(O/H) = 8.73 - 0.32 × O3N2) is only valid for 1 < O3N2 < 1.9. The calibration of PP04 shows a shallower slope than ours, which comes from their much smaller sample (65 objects) and the much narrower O3N2 range.

## 6.4. The S2 index

The S2 index (log([S II]λλ6717,6731/Hα)) is also a metallicity-sensitive indicator. Although it is less useful than N2 for metallicity calibration due to the stronger dependence on the ionization parameter, it is still interesting to derive a calibration from S2 since it is dependent on metallicity monotonically in the studied metallicity range. This relation has the advantage of not being strongly dependent on reddening corrections. Although the sample data is very scattered, a linear relation obviously exists between O/H and S2.

We calculated the mean values of S2 and O/H abundances for the sample galaxies in 11 bins, the bin widths are the same as we used for the N2 and O3N2 calibrations. Again, the objects with a higher uncertainty than 0.06 dex on log(O/H) and log([S II]/Hα) are excluded in the calculations, which leaves 607 data points. A least-square linear fit to the mean-valued points yields the relation:

$$12 + \log(O/H) = 9.128 + 1.051 \times S2, \quad (11)$$

with S2 = log([S II]λλ6717,6731/Hα), shown in Fig. 5d. The rms of the data to the fit is about 0.176 dex. The 2σ discrepancy is shown by the two dashed lines.

## 6.5. Add the P parameter

The calibration of O/H vs. N2 is dependent on the ionization parameter (Fig. 4b), as well the O3N2 and S2 indices (Figs. 4c, d). Therefore, to get more reliable O/H abundances, an excitation parameter could be included in the calibrations, which correlates strongly with ionization parameter and the hardness of the ionizing radiation field. We use the P parameter given by Pilyugin (2000, 2001a,b), where P was defined as [O III]/([O II]+[O III]), which is similar to [O III]/[O II], the excitation parameter used by Kobulnicky et al. (1999) in calibrations. We should notice that P needs to be computed from the dereddened emission lines.

In Fig. 6a, we plot the (log(O/H)$_{T_c}$ - log(O/H)$_{N2}$) vs. P relations for the sample galaxies, which shows that these galaxies

<figure><img src="image_8.png" /></figure>

<figure><img src="image_9.png" /><figcaption>**Fig. 6.** a) The relation between log(O/H)$_{T_c}$ - log(O/H)$_{N2}$ vs. P for the sample galaxies, which shows that they can be roughly divided into three subsamples with different P parameters: P > 0.80, 0.65 < P < 0.80 and P < 0.65. The symbols are the same as in Fig. 4. b) The calibration of N2 index together with the P parameter. The blue open squares represent the samples with P > 0.80, the red points represent those with 0.65 < P < 0.80, and the green triangles represent those with P < 0.65. The solid, long-dashed, and short-dashed lines refer to the linear least-square fits for each of the three subsamples, respectively (Eq. (12)). The five dotted lines are the model results of KD02, from the right to the left ones, the ionization parameter q increases from the 5 × 10⁶ to the 1 × 10⁷, 2 × 10⁷, 4 × 10⁷, and 8 × 10⁷ cm s⁻¹ grids.</figcaption></figure>

can be roughly separated into three subsamples with P < 0.65 (143 data points), 0.65 < P < 0.80 (292 data points), and P > 0.80 (149 data points). We derive the N2 calibrations for these three subsamples individually. The analytical calibrations of linear least-square fits for the three subsamples with different P parameters are:

$$\begin{aligned} 12 + \log(O/H) &= 9.514 + 0.916 \times N2, \quad (P > 0.80), \\ &= 9.457 + 0.976 \times N2, \quad (0.65 < P < 0.80), \\ &= 9.332 + 0.998 \times N2, \quad (P < 0.65). \end{aligned} \quad (12)$$

The rms of the data to each fit are 0.150, 0.140, and 0.189 dex, respectively. The dotted lines are the photoionization model results of KD02. It shows that the three different P values only correspond to the cases of KD02 of q = 4 × 10⁷, 1 × 10⁷(as well 2 × 10⁷), and 5 × 10⁶ cm s⁻¹.

We also tried to add P as an additional parameter for the O3N2 and S2 indices. The sample galaxies are separated into three sub-samples with P < 0.60, 0.60 < P < 0.85, and P > 0.85 to derive calibrations for these two indices. The basic
<figure><img src="image_10.png" /><figcaption>Fig. 7. Comparisons between the $T_e$-based O/H abundances with those derived from strong-line ratios, including N2 (without and with P), O3N2, and S2 indices: a) for the N2 index (without P, Eq. (9), Fig. 5b); b) for the N2 index (with P, Eq. (12), Fig. 6); c) for the O3N2 index (Eq. (10), Fig. 5c); d) for the S2 index (Eq. (11), Fig. 5d). The rms values of the data to the equal-value lines in each plot are 0.162, 0.158, 0.191, and 0.171 dex, respectively, and they will increase to 0.173, 0.167, 0.215, and 0.203 dex if the data points with uncertainties larger than 0.06 dex in line indices and log(O/H) are included. The symbols in a), c), d) are the same as in Fig. 4, and the symbols in b) are the same as in Fig. 6b.</figcaption></figure>

results consistently follow the photoionization models of KD02. However, we find adding a P parameter does not improve the fits much. Therefore, we do not present the two-parameter calibrations for the O3N2 and S2 indices as figures here. We should note that using P with [N II]/H$\alpha$ means that we need observations covering a much wider wavelength range, which might not be practical at high z. It is not necessary to add the P parameter to the R$_{23}$ calibration since the observational data in the R$_{23}$ vs. O/H relation does not show obvious dependence on ionization parameter in contrast to the lower-branch models (Fig. 4a).

## 6.6. The accuracies of the derived calibrations

We have presented the least-square fits for the relations of 12 + log(O/H)$T_e$ and N2, O3N2, and S2 indices with and without considering the P excitation parameter. To show the accuracies of these calibrations, in Figs. 7a–d we plot the comparisons between log(O/H)$T_e$ and those from line indices. Figures 7a,c,d show the comparisons with the calibrated abundances from N2, O3N2, S2 indices following Eqs. (9)–(11), which have been given as the solid lines in Figs. 5b–d, respectively. Figure 7b shows the calibrated abundances from the N2 index but adding the P parameter following Eq. (12), which improved the N2 calibration. Among these, the rms of the O3N2 and S2 calibrations are large, about 0.191 and 0.171 dex respectively (Fig. 7c,d). The calibration of (N2,P) case (Fig. 7b) shows the lowest rms, which is about 0.158, a bit lower than the rms in Figs. 7a and 3e for the N2 calibration (0.162 and 0.160 dex respectively).

<figure><img src="image_11.png" /><figcaption>Fig. 8. Correlation between the difference in log(O/H)$_{N2,P}$ and log(O/H)$_{T_e}$ and the log(N/O) abundance ratios of the sample galaxies. The symbols are the same as in Figs. 6b, 7b. The solid line is the linear least-square fit for the relations with an rms of 0.104 dex.</figcaption></figure>

Some of the remaining scatter in log(O/H)$_{N2,P}$ may come from the different star-forming history and evolutionary status of the sample galaxies. Figure 8 shows a clear correlation between the log(O/H)$_{N2,P}$ − log(O/H)$_{T_e}$ and the log(N/O) abundance ratios of the sample galaxies, which can be given as a linear least-square fit:

$$ \log(\text{O/H})_{\text{N2,P}} - \log(\text{O/H})_{T_e} = 0.902 \times \log(\text{N/O}) + 1.240, \quad (13) $$

with an rms of 0.104 dex. The corrected calibration of (N2, P) by considering this correlation will provide more accurate oxygen abundance, and the rms of the data to the equal-value lines in Figs. 7a and 7b will decrease to 0.115 dex, which is much less than the previous ones (0.162 and 0.158 dex, respectively). This correlation can be used to correct the derived oxygen abundances from the strong-line ratio when it is necessary. Nevertheless, to apply the N/O correction to 12+log(O/H) abundances, we need to measure [O II], [O III], and H$\beta$, in addition to [N II] and H$\alpha$, so it will not always be practical.

We should notice that both the x and y axes of Fig. 8 depend on nitrogen abundance, which means that the observed correlation could be spurious if the errors in log(N) are large. However, the errors in the log(N/O) abundances of the sample galaxies are quite small. It is about 0.011 dex on average for the MPA/JHU sample galaxies, which is expected since we only select the objects with higher signal-to-noise ratio, i.e. larger than 5$\sigma$, on the flux measurements of [N II] (see Sect. 2.1). For other samples from the literature, the errors in their log(N/O) values are about 0.021 dex on average. Therefore, this correlation is robustly measured and could be used to correct 12+log(O/H)$_{N2,P}$ measurements if desired. More important, the strong trend in Fig. 8 highlights the sensitivity of the N2 calibration to a galaxy’s past history of star formation, since it determines the present-day N/O ratio.

## 7. Conclusions

We compiled a large sample of 695 low-metallicity galaxies and H II regions with [O III]4363 detected, which consists of 531 galaxies from the SDSS-DR4 and 164 galaxies and H II regions from the literature. We determined their electron temperatures, electron densities, and then the $T_e$-based oxygen abundances. The derived oxygen abundances for them are 7.1 < 12+log(O/H) < 8.5.
The comparison of the *T*<sub>e</sub>-based oxygen abundances and the Bayesian metallicities obtained by the MPA/JHU group show that, for about half of the MPA/JHU sample galaxies in this study, their O/H abundances were overestimated by a factor of 0.34 dex on average by using the photoionization models (Charlot et al. 2006; Tremonti et al. 2004; Brinchmann et al. 2004). This is possibly related to how secondary nitrogen enrichment is treated in the models they used.

The *T*<sub>e</sub>-derived oxygen abundances of these sample galaxies were compared with those derived from other strong-line ratios, such as *R*<sub>23</sub>, *R*<sub>23</sub> − *P*, N2, and O3N2 indicators. The results show that the *R*<sub>23</sub> and *R*<sub>23</sub> − *P* methods will generally overestimate the oxygen abundances of the sample galaxies by a factor of ~0.20 dex and ~0.06 dex, respectively. This 0.06 dex discrepancy is quite small, and will decrease to 0.025 dex when the improved *R*<sub>23</sub>−*P* calibrations given by Pilyugin & Thuan (2005) are used. The abundance calibration of N2 index, rather than O3N2 index, from PP04 can result in consistent O/H abundances with (O/H)*T*<sub>e</sub> but with a scatter of about 0.16 dex.

From this large sample of 695 star-forming galaxies and H II regions, we re-derive abundance calibrations for R<sub>23</sub>, N2, O3N2, and S2 indices on the basis of their oxygen abundances derived from T<sub>e</sub>. The N2, O3N2, and S2 indices monotonically change following the increasing O/H abundances from 12+log(O/H) = 7.1 to 8.5, which are consistent with the photoionization model results of KD02. The R<sub>23</sub> parameter is a good metallicity indicator for the metal-poor galaxies with 12+log(O/H) < 7.9. Nevertheless, R<sub>23</sub> does not follow the KD02 models well.

The scatter of the observational data may come from the differences in the ionizing radiation field. We add an excitation parameter *P* to separate the sample galaxies into three sub-samples, and then re-derive the N2 calibrations with three different *P* cases (<0.65, 0.65–0.80, >0.80), which improves the calibration, confirmed by the decreasing rms of the data to the equal-value line, which decreases from 0.162 in Fig. 7a to 0.158 in Fig. 7b. Adding the *P* parameter in the O3N2 and S2 indices does not improve the calibrations. However, some of the remaining scatter in the (N2,P) calibration may come from the different star-forming history and evolutionary status of the galaxies, which can be confirmed by the correlation between the log(O/H)<sub>N2,P</sub> − log(O/H)<sub>T</sub><sub>e</sub> and log(N/O) of them (Fig. 8 and Eq. (13)).

In future studies of the calibrating oxygen abundances of galaxies, when their *T*<sub>e</sub> values are not available, we can use the *R*<sub>23</sub>, N2, O3N2, or S2 indices, together with the *P* parameter if the wavelength coverage is wide enough, to calibrate their oxygen abundances. The *R*<sub>23</sub> parameter shows obvious correlation with oxygen abundances for the low-metallicity galaxies with 12+log(O/H) < 7.9. Compared with O3N2 and S2, The N2 index is less affected by ionization parameter and more obviously correlated with O/H abundances. Also it can be detected by the near-infrared instruments for the intermediate- and high-z star-forming galaxies. The N2 index has helped to provide important information on the metallicities of galaxies at high-z; for example, see Shapley et al. (2004) for a sample of 7 star-forming galaxies at 2.1 < *z* < 2.5, Shapley et al. (2005) for a sample of 12 star-forming galaxies at *z* ~ 1.0–1.5, and Erb et al. (2006) for the six composited spectra of 87 rest-frame UV-selected star-forming galaxies at *z* > 2, etc. However, considering the dependence of N2, as well as the (N2,P) calibration on log(N/O) shown as Fig. 8, we should keep in mind that the resulting log(O/H) abundances from N2 may involve the specific history of N-enrichment in the galaxies. We may worry a bit about comparing the low and high-z observations using [N II] for this reason.

Given the good consistency of our N2 and S2 abundance calibrations with the models of KD02 at low metallicity (see Fig. 4b,d), it may be appropriate to linearly extrapolate our calibrations up to the high metallicity region, up to 12+log(O/H)~9.0 and 8.8 respectively. However, this extrapolation on N2 will result in a lower log(O/H) abundance than the one directly derived from the calibration of the metal-rich SDSS galaxies obtained by Liang et al. (2006), which may be due to the discrepancy between the *T*<sub>e</sub>- and the *R*<sub>23</sub>-based metallicities. However, the *T*<sub>e</sub>-based O3N2 calibration cannot be directly extrapolated to the metal-rich region since the slopes of the correlation relations between log(O/H) vs. O3N2 are not the same in the high-metallicity branch as in the low-metallicity branch (Fig. 4c). The *R*<sub>23</sub> parameter cannot provide reliable oxygen abundances for the galaxies in the metallicity turn-over region with 7.9 < 12+log(O/H) < 8.4.

**Acknowledgements.** We thank the referee for many valuable and wise suggestions and comments, which helped us in improving this work. We thank Stephane Charlot for the interesting discussions about their models for estimating the oxygen abundances of the SDSS galaxies. S.Y.Y. and Y.C.L. thank Jing Wang and Caina Hao for the interesting discussions about the SDSS database. S.Y.Y thanks Yongheng Zhao and the LAMOST group for kindly providing their office for his stay. This work was supported by the Natural Science Foundation of China (NSFC) Foundation under No.10403006, 10433010 10373005, 10573022, 10333060, and 10521001.

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**Online Material**
<table><caption>**Table 1.** The characteristic parameters of the SDSS galaxies: N2 = log([N II]6483/Hα), O3N2 = log([O III]5007/Hβ)/([N II]6483/Hα)), S2 = log([S II]6717,6731/Hα), P = [O III]/([O II]+[O III]). (O/H)Bay = 12+(O/H)Bayian obtained by the MPA/JHU group.</caption><thead><tr><th>(1)<br>Num</th><th>(2)<br>Plate-MJD-FiberID</th><th>(3)<br>IAU designations</th><th>(4)<br>t<sub>5</sub> (10<sup>4</sup>K)</th><th>(5)<br>12+(O/H)<sub>re</sub></th><th>(6)<br>(O/H)<sub>Bay</sub></th><th>(7)<br>N2</th><th>(8)<br>S2</th><th>(9)<br>O3N2</th><th>(10)<br>P</th></tr></thead><tbody><tr><td>1</td><td>266-51630-407</td><td>J094333.91+010659.4</td><td>1.080 ± 0.062</td><td>8.197 ± 0.050</td><td>8.659</td><td>-0.911 ± 0.005</td><td>-0.683 ± 0.005</td><td>1.436 ± 0.003</td><td>0.552</td></tr><tr><td>2</td><td>270-51909-617</td><td>J101430.99+004754.9</td><td>1.198 ± 0.037</td><td>8.141 ± 0.031</td><td>8.427</td><td>-1.331 ± 0.010</td><td>-0.954 ± 0.011</td><td>2.128 ± 0.008</td><td>0.776</td></tr><tr><td>3</td><td>276-51909-490</td><td>J105342.55+000945.0</td><td>1.203 ± 0.073</td><td>8.142 ± 0.051</td><td>8.179</td><td>-1.250 ± 0.014</td><td>-0.746 ± 0.009</td><td>1.941 ± 0.012</td><td>0.639</td></tr><tr><td>4</td><td>277-51908-451</td><td>J110116.39+004814.4</td><td>1.450 ± 0.029</td><td>7.982 ± 0.025</td><td>8.090</td><td>-1.605 ± 0.026</td><td>-1.346 ± 0.029</td><td>2.581 ± 0.024</td><td>0.924</td></tr><tr><td>5</td><td>282-51658-543</td><td>J113703.79+002817.4</td><td>1.199 ± 0.025</td><td>8.210 ± 0.022</td><td>8.206</td><td>-1.413 ± 0.014</td><td>-0.918 ± 0.008</td><td>2.303 ± 0.012</td><td>0.811</td></tr><tr><td>6</td><td>283-51959-572</td><td>J114649.34+005345.9</td><td>1.608 ± 0.035</td><td>7.884 ± 0.030</td><td>7.990</td><td>-2.019 ± 0.041</td><td>-1.392 ± 0.022</td><td>3.018 ± 0.033</td><td>0.937</td></tr><tr><td>7</td><td>285-51930-154</td><td>J120047.07-003611.8</td><td>1.056 ± 0.067</td><td>8.311 ± 0.061</td><td>8.234</td><td>-1.247 ± 0.010</td><td>-0.769 ± 0.009</td><td>1.947 ± 0.008</td><td>0.656</td></tr><tr><td>8</td><td>289-51990-369</td><td>J122419.73+010559.6</td><td>1.245 ± 0.033</td><td>8.075 ± 0.027</td><td>7.993</td><td>-1.615 ± 0.014</td><td>-1.019 ± 0.009</td><td>2.419 ± 0.012</td><td>0.809</td></tr><tr><td>9</td><td>292-51609-372</td><td>J124715.31+003806.7</td><td>1.235 ± 0.048</td><td>8.099 ± 0.032</td><td>8.087</td><td>-1.362 ± 0.011</td><td>-0.774 ± 0.007</td><td>2.077 ± 0.009</td><td>0.679</td></tr><tr><td>10</td><td>296-51984-416</td><td>J131937.25+005043.8</td><td>1.005 ± 0.028</td><td>8.417 ± 0.032</td><td>8.469</td><td>-1.352 ± 0.008</td><td>-0.966 ± 0.007</td><td>2.184 ± 0.005</td><td>0.774</td></tr><tr><td>11</td><td>297-51959-442</td><td>J132654.62+011346.5</td><td>1.175 ± 0.028</td><td>8.178 ± 0.026</td><td>8.348</td><td>-1.434 ± 0.013</td><td>-1.041 ± 0.013</td><td>2.278 ± 0.011</td><td>0.822</td></tr><tr><td>12</td><td>299-51671-311</td><td>J133649.51-001158.9</td><td>0.977 ± 0.040</td><td>8.381 ± 0.045</td><td>8.615</td><td>-1.222 ± 0.008</td><td>-0.911 ± 0.007</td><td>1.945 ± 0.005</td><td>0.731</td></tr><tr><td>13</td><td>304-51957-12</td><td>J142214.30-003919.8</td><td>1.411 ± 0.044</td><td>7.971 ± 0.028</td><td>8.076</td><td>-1.580 ± 0.026</td><td>-1.126 ± 0.014</td><td>2.426 ± 0.024</td><td>0.804</td></tr><tr><td>14</td><td>304-51957-568</td><td>J142200.19+010213.2</td><td>0.994 ± 0.056</td><td>8.400 ± 0.057</td><td>8.448</td><td>-1.225 ± 0.008</td><td>-0.812 ± 0.011</td><td>1.938 ± 0.006</td><td>0.667</td></tr><tr><td>15</td><td>308-51662-412</td><td>J144458.53+004618.8</td><td>0.972 ± 0.048</td><td>8.432 ± 0.054</td><td>8.706</td><td>-1.009 ± 0.008</td><td>-0.887 ± 0.011</td><td>1.796 ± 0.007</td><td>0.758</td></tr><tr><td>16</td><td>309-51994-489</td><td>J145533.67+003657.2</td><td>1.126 ± 0.053</td><td>8.232 ± 0.039</td><td>8.577</td><td>-1.006 ± 0.006</td><td>-0.727 ± 0.007</td><td>1.678 ± 0.004</td><td>0.617</td></tr><tr><td>17</td><td>310-51990-136</td><td>J150356.83+004200.3</td><td>1.059 ± 0.045</td><td>8.308 ± 0.043</td><td>8.358</td><td>-1.300 ± 0.010</td><td>-0.866 ± 0.008</td><td>2.053 ± 0.008</td><td>0.720</td></tr><tr><td>18</td><td>311-51665-8</td><td>J151320.62-002551.9</td><td>1.119 ± 0.064</td><td>8.130 ± 0.054</td><td>8.842</td><td>-0.871 ± 0.007</td><td>-0.918 ± 0.012</td><td>1.517 ± 0.005</td><td>0.711</td></tr><tr><td>19</td><td>313-51673-638</td><td>J152830.72+001740.2</td><td>1.185 ± 0.039</td><td>8.150 ± 0.032</td><td>8.454</td><td>-1.385 ± 0.013</td><td>-0.906 ± 0.009</td><td>2.172 ± 0.010</td><td>0.770</td></tr><tr><td>20</td><td>337-51997-593</td><td>J152556.06-021333.9</td><td>1.560 ± 0.029</td><td>7.831 ± 0.026</td><td>7.854</td><td>-2.040 ± 0.048</td><td>-1.497 ± 0.018</td><td>2.958 ± 0.044</td><td>0.942</td></tr><tr><td>21</td><td>339-51692-437</td><td>J130324.17-021046.9</td><td>0.982 ± 0.053</td><td>8.372 ± 0.056</td><td>8.493</td><td>-1.141 ± 0.007</td><td>-0.741 ± 0.006</td><td>1.814 ± 0.005</td><td>0.670</td></tr><tr><td>22</td><td>344-51693-321</td><td>J155957.38+004741.2</td><td>1.305 ± 0.058</td><td>8.077 ± 0.041</td><td>8.739</td><td>-1.375 ± 0.022</td><td>-1.115 ± 0.029</td><td>2.265 ± 0.020</td><td>0.854</td></tr><tr><td>23</td><td>348-51671-297</td><td>J163012.60-005408.6</td><td>1.157 ± 0.045</td><td>8.169 ± 0.034</td><td>8.474</td><td>-1.149 ± 0.010</td><td>-0.776 ± 0.016</td><td>1.856 ± 0.008</td><td>0.685</td></tr><tr><td>24</td><td>348-51671-331</td><td>J163107.20+005324.7</td><td>1.175 ± 0.055</td><td>8.159 ± 0.042</td><td>8.084</td><td>-1.357 ± 0.007</td><td>-0.813 ± 0.008</td><td>2.084 ± 0.009</td><td>0.698</td></tr><tr><td>25</td><td>350-51691-500</td><td>J171212.07+650248.4</td><td>1.137 ± 0.065</td><td>8.072 ± 0.049</td><td>8.819</td><td>-0.786 ± 0.004</td><td>-0.773 ± 0.006</td><td>1.320 ± 0.002</td><td>0.625</td></tr><tr><td>26</td><td>351-51780-212</td><td>J170201.44+604746.3</td><td>1.003 ± 0.040</td><td>8.316 ± 0.038</td><td>8.616</td><td>-0.963 ± 0.005</td><td>-0.739 ± 0.005</td><td>1.579 ± 0.003</td><td>0.636</td></tr><tr><td>27</td><td>351-51780-600</td><td>J170922.63+614851.1</td><td>1.046 ± 0.066</td><td>8.251 ± 0.058</td><td>8.622</td><td>-1.029 ± 0.008</td><td>-0.705 ± 0.009</td><td>1.612 ± 0.006</td><td>0.607</td></tr><tr><td>28</td><td>353-51703-479</td><td>J170517.74+593546.6</td><td>1.127 ± 0.063</td><td>8.152 ± 0.047</td><td>8.589</td><td>-1.036 ± 0.006</td><td>-0.669 ± 0.005</td><td>1.618 ± 0.005</td><td>0.600</td></tr><tr><td>29</td><td>358-51818-403</td><td>J173021.82+571531.6</td><td>1.074 ± 0.061</td><td>8.297 ± 0.055</td><td>8.568</td><td>-1.181 ± 0.010</td><td>-0.848 ± 0.008</td><td>1.942 ± 0.008</td><td>0.721</td></tr><tr><td>30</td><td>363-51989-532</td><td>J153258.27+004100.2</td><td>1.036 ± 0.065</td><td>8.346 ± 0.062</td><td>8.694</td><td>-0.837 ± 0.006</td><td>-0.729 ± 0.007</td><td>1.558 ± 0.003</td><td>0.673</td></tr><tr><td>31</td><td>364-52000-66</td><td>J163006.89-001810.8</td><td>1.106 ± 0.063</td><td>8.255 ± 0.053</td><td>8.483</td><td>-1.162 ± 0.009</td><td>-0.789 ± 0.007</td><td>1.898 ± 0.007</td><td>0.687</td></tr><tr><td>32</td><td>364-52000-384</td><td>J162150.66+003509.2</td><td>1.337 ± 0.079</td><td>8.018 ± 0.041</td><td>8.334</td><td>-1.048 ± 0.007</td><td>-0.576 ± 0.006</td><td>1.647 ± 0.005</td><td>0.537</td></tr><tr><td>33</td><td>374-51791-612</td><td>J221823.86+003918.3</td><td>1.097 ± 0.074</td><td>8.260 ± 0.065</td><td>8.315</td><td>-1.214 ± 0.013</td><td>-0.780 ± 0.010</td><td>1.965 ± 0.011</td><td>0.714</td></tr><tr><td>34</td><td>375-52140-118</td><td>J222510.13-001152.8</td><td>1.413 ± 0.020</td><td>7.972 ± 0.020</td><td>7.984</td><td>-1.763 ± 0.012</td><td>-1.250 ± 0.008</td><td>2.680 ± 0.010</td><td>0.896</td></tr><tr><td>35</td><td>375-52140-348</td><td>J221823.86+003918.3</td><td>1.150 ± 0.063</td><td>8.213 ± 0.051</td><td>8.343</td><td>-1.213 ± 0.012</td><td>-0.787 ± 0.009</td><td>1.969 ± 0.009</td><td>0.700</td></tr><tr><td>36</td><td>380-51792-253</td><td>J225906.70-005810.2</td><td>0.972 ± 0.058</td><td>8.459 ± 0.065</td><td>8.619</td><td>-1.131 ± 0.007</td><td>-0.931 ± 0.008</td><td>1.911 ± 0.005</td><td>0.716</td></tr><tr><td>37</td><td>384-51821-281</td><td>J232936.56-011057.0</td><td>1.184 ± 0.025</td><td>8.192 ± 0.024</td><td>8.217</td><td>-1.384 ± 0.008</td><td>-0.931 ± 0.007</td><td>2.249 ± 0.006</td><td>0.821</td></tr><tr><td>38</td><td>386-51788-573</td><td>J235347.69+005402.1</td><td>1.194 ± 0.088</td><td>8.179 ± 0.067</td><td>8.217</td><td>-1.379 ± 0.033</td><td>-0.866 ± 0.023</td><td>2.182 ± 0.031</td><td>0.742</td></tr><tr><td>39</td><td>388-51793-239</td><td>J000703.98-003447.6</td><td>1.246 ± 0.033</td><td>8.128 ± 0.027</td><td>8.163</td><td>-1.468 ± 0.015</td><td>-0.970 ± 0.011</td><td>2.313 ± 0.013</td><td>0.792</td></tr><tr><td>40</td><td>388-51793-457</td><td>J000657.02+005125.9</td><td>1.221 ± 0.029</td><td>8.173 ± 0.025</td><td>8.492</td><td>-1.345 ± 0.009</td><td>-0.989 ± 0.009</td><td>2.215 ± 0.006</td><td>0.799</td></tr><tr><td>41</td><td>394-51913-402</td><td>J005105.28+004600.1</td><td>0.982 ± 0.049</td><td>8.426 ± 0.051</td><td>8.177</td><td>-1.297 ± 0.008</td><td>-0.814 ± 0.005</td><td>2.034 ± 0.007</td><td>0.684</td></tr><tr><td>42</td><td>398-51789-223</td><td>J011633.94-002043.0</td><td>1.144 ± 0.076</td><td>8.187 ± 0.063</td><td>8.115</td><td>-1.281 ± 0.015</td><td>-0.750 ± 0.010</td><td>2.002 ± 0.013</td><td>0.699</td></tr><tr><td>43</td><td>406-51869-484</td><td>J022407.68+003226.1</td><td>1.141 ± 0.072</td><td>8.194 ± 0.053</td><td>8.104</td><td>-1.309 ± 0.010</td><td>-0.699 ± 0.006</td><td>1.956 ± 0.008</td><td>0.609</td></tr><tr><td>44</td><td>408-51821-472</td><td>J023900.79+001836.0</td><td>1.265 ± 0.037</td><td>8.140 ± 0.033</td><td>8.376</td><td>-1.509 ± 0.028</td><td>-1.145 ± 0.027</td><td>2.455 ± 0.026</td><td>0.891</td></tr><tr><td>45</td><td>409-51871-50</td><td>J024939.72-011151.3</td><td>1.309 ± 0.033</td><td>8.042 ± 0.028</td><td>8.013</td><td>-1.652 ± 0.015</td><td>-1.060 ± 0.010</td><td>2.519 ± 0.013</td><td>0.857</td></tr><tr><td>46</td><td>414-51901-546</td><td>J032750.16+010135.0</td><td>1.057 ± 0.048</td><td>8.296 ± 0.038</td><td>8.472</td><td>-1.104 ± 0.006</td><td>-0.689 ± 0.004</td><td>1.742 ± 0.004</td><td>0.601</td></tr><tr><td>47</td><td>415-51810-287</td><td>J033031.22-005846.5</td><td>1.178 ± 0.034</td><td>8.199 ± 0.031</td><td>8.127</td><td>-1.481 ± 0.013</td><td>-0.972 ± 0.008</td><td>2.343 ± 0.010</td><td>0.815</td></tr><tr><td>48</td><td>419-51879-364</td><td>J004236.94+160202.7</td><td>1.103 ± 0.042</td><td>8.265 ± 0.040</td><td>8.814</td><td>-1.091 ± 0.010</td><td>-1.054 ± 0.030</td><td>1.926 ± 0.008</td><td>0.807</td></tr><tr><td>49</td><td>420-51871-156</td><td>J005425.68+144852.2</td><td>1.156 ± 0.035</td><td>8.206 ± 0.029</td><td>8.160</td><td>-1.406 ± 0.009</td><td>-0.929 ± 0.007</td><td>2.190 ± 0.007</td><td>0.737</td></tr><tr><td>50</td><td>420-51871-474</td><td>J005300.53+150129.6</td><td>1.200 ± 0.060</td><td>8.136 ± 0.042</td><td>8.138</td><td>-1.282 ± 0.012</td><td>-0.748 ± 0.008</td><td>1.957 ± 0.009</td><td>0.633</td></tr><tr><td>51</td><td>423-51821-402</td><td>J011354.58+153947.8</td><td>1.265 ± 0.036</td><td>8.075 ± 0.027</td><td>8.131</td><td>-1.426 ± 0.011</td><td>-0.955 ± 0.009</td><td>2.214 ± 0.008</td><td>0.761</td></tr></tbody></table>
<table><caption>Table 1. continued.</caption><thead><tr><th>(1)</th><th>(2)</th><th>(3)</th><th>(4)</th><th>(5)</th><th>(6)</th><th>(7)</th><th>(8)</th><th>(9)</th><th>(10)</th></tr><tr><th>Num</th><th>Plate-MJD-FiberID</th><th>IAU designations</th><th>t<sub>3</sub> (10<sup>4</sup>K)</th><th>12+log(O/H)<sub>T<sub>e</sub></sub></th><th>(O/H)<sub>Bay</sub></th><th>N2</th><th>S 2</th><th>O3N2</th><th>P</th></tr></thead><tbody><tr><td>52</td><td>424-51893-368</td><td>J012223.90+152031.9</td><td>1.146 ± 0.036</td><td>8.226 ± 0.034</td><td>8.812</td><td>-1.038 ± 0.007</td><td>-1.008 ± 0.012</td><td>1.897 ± 0.005</td><td>0.822</td></tr><tr><td>53</td><td>430-51877-97</td><td>J015453.90+130721.7</td><td>1.173 ± 0.083</td><td>8.190 ± 0.065</td><td>8.165</td><td>-1.256 ± 0.021</td><td>-0.711 ± 0.010</td><td>1.971 ± 0.016</td><td>0.649</td></tr><tr><td>54</td><td>431-51877-191</td><td>J073256.71+370449.8</td><td>0.966 ± 0.039</td><td>8.372 ± 0.042</td><td>8.697</td><td>-0.981 ± 0.005</td><td>-0.851 ± 0.007</td><td>1.640 ± 0.003</td><td>0.684</td></tr><tr><td>55</td><td>436-51883-391</td><td>J075446.42+451502.7</td><td>0.975 ± 0.045</td><td>8.348 ± 0.048</td><td>8.615</td><td>-1.022 ± 0.008</td><td>-0.776 ± 0.010</td><td>1.677 ± 0.006</td><td>0.695</td></tr><tr><td>56</td><td>442-51882-223</td><td>J082001.71+505039.1</td><td>1.099 ± 0.046</td><td>8.265 ± 0.039</td><td>8.499</td><td>-1.206 ± 0.011</td><td>-0.818 ± 0.009</td><td>1.941 ± 0.010</td><td>0.689</td></tr><tr><td>57</td><td>443-51873-542</td><td>J083108.23+493159.1</td><td>1.145 ± 0.039</td><td>8.177 ± 0.032</td><td>8.028</td><td>-1.407 ± 0.012</td><td>-0.896 ± 0.008</td><td>2.147 ± 0.010</td><td>0.732</td></tr><tr><td>58</td><td>446-51899-86</td><td>J084526.52+531916.2</td><td>1.011 ± 0.050</td><td>8.658 ± 0.063</td><td>8.196</td><td>-1.290 ± 0.008</td><td>-0.819 ± 0.007</td><td>2.010 ± 0.006</td><td>0.393</td></tr><tr><td>59</td><td>446-51899-283</td><td>J083516.99+533211.0</td><td>0.979 ± 0.050</td><td>8.409 ± 0.051</td><td>8.491</td><td>-1.202 ± 0.007</td><td>-0.796 ± 0.006</td><td>1.881 ± 0.005</td><td>0.642</td></tr><tr><td>60</td><td>446-51899-352</td><td>J083313.18+542222.8</td><td>1.062 ± 0.054</td><td>8.305 ± 0.053</td><td>8.403</td><td>-1.320 ± 0.013</td><td>-0.907 ± 0.011</td><td>2.106 ± 0.011</td><td>0.760</td></tr><tr><td>61</td><td>446-51899-541</td><td>J084703.00+545039.4</td><td>1.114 ± 0.051</td><td>8.231 ± 0.042</td><td>8.086</td><td>-1.404 ± 0.023</td><td>-0.780 ± 0.008</td><td>2.123 ± 0.021</td><td>0.684</td></tr><tr><td>62</td><td>447-51877-172</td><td>J084852.46+514532.7</td><td>1.058 ± 0.065</td><td>8.328 ± 0.062</td><td>8.112</td><td>-1.452 ± 0.017</td><td>-0.826 ± 0.009</td><td>2.212 ± 0.014</td><td>0.703</td></tr><tr><td>63</td><td>452-51911-387</td><td>J092635.26+582047.4</td><td>1.251 ± 0.060</td><td>8.123 ± 0.048</td><td>8.049</td><td>-1.750 ± 0.065</td><td>-1.119 ± 0.037</td><td>2.651 ± 0.063</td><td>0.870</td></tr><tr><td>64</td><td>452-51911-487</td><td>J093248.77+582530.7</td><td>1.018 ± 0.039</td><td>8.324 ± 0.039</td><td>8.500</td><td>-1.194 ± 0.007</td><td>-0.796 ± 0.006</td><td>1.883 ± 0.005</td><td>0.687</td></tr><tr><td>65</td><td>454-51908-111</td><td>J022907.37+085726.2</td><td>1.051 ± 0.035</td><td>8.318 ± 0.034</td><td>8.186</td><td>-1.328 ± 0.011</td><td>-0.894 ± 0.011</td><td>2.104 ± 0.010</td><td>0.747</td></tr><tr><td>66</td><td>455-51909-369</td><td>J023426.93+072807.6</td><td>1.187 ± 0.077</td><td>8.163 ± 0.056</td><td>8.149</td><td>-1.315 ± 0.016</td><td>-0.745 ± 0.010</td><td>2.015 ± 0.014</td><td>0.647</td></tr><tr><td>67</td><td>456-51910-195</td><td>J024453.66+082137.8</td><td>1.236 ± 0.032</td><td>8.101 ± 0.023</td><td>8.046</td><td>-1.493 ± 0.010</td><td>-0.926 ± 0.008</td><td>2.260 ± 0.008</td><td>0.740</td></tr><tr><td>68</td><td>458-51929-42</td><td>J030539.70+083905.4</td><td>1.261 ± 0.075</td><td>8.142 ± 0.057</td><td>8.207</td><td>-1.420 ± 0.028</td><td>-0.930 ± 0.018</td><td>2.312 ± 0.026</td><td>0.816</td></tr><tr><td>69</td><td>458-51929-185</td><td>J030321.41+075923.2</td><td>1.480 ± 0.024</td><td>7.898 ± 0.021</td><td>7.898</td><td>-1.586 ± 0.016</td><td>-1.414 ± 0.030</td><td>2.482 ± 0.014</td><td>0.902</td></tr><tr><td>70</td><td>459-51924-253</td><td>J031023.95+083432.8</td><td>1.016 ± 0.039</td><td>8.377 ± 0.042</td><td>8.480</td><td>-1.334 ± 0.010</td><td>-0.958 ± 0.007</td><td>2.137 ± 0.008</td><td>0.767</td></tr><tr><td>71</td><td>460-51924-128</td><td>J032101.01+080150.1</td><td>1.020 ± 0.047</td><td>8.333 ± 0.049</td><td>8.429</td><td>-1.263 ± 0.008</td><td>-0.843 ± 0.007</td><td>1.985 ± 0.006</td><td>0.714</td></tr><tr><td>72</td><td>460-51924-592</td><td>J032613.63+063512.4</td><td>1.110 ± 0.023</td><td>8.269 ± 0.023</td><td>8.754</td><td>-1.101 ± 0.007</td><td>-0.937 ± 0.009</td><td>1.939 ± 0.005</td><td>0.798</td></tr><tr><td>73</td><td>463-51908-299</td><td>J034543.94+065446.0</td><td>1.126 ± 0.064</td><td>8.215 ± 0.052</td><td>8.362</td><td>-1.176 ± 0.009</td><td>-0.730 ± 0.008</td><td>1.853 ± 0.007</td><td>0.641</td></tr><tr><td>74</td><td>467-51901-628</td><td>J085201.82+010459.5</td><td>1.226 ± 0.035</td><td>8.104 ± 0.025</td><td>8.081</td><td>-1.387 ± 0.012</td><td>-0.858 ± 0.008</td><td>2.136 ± 0.009</td><td>0.725</td></tr><tr><td>75</td><td>468-51912-250</td><td>J085207.68-001117.8</td><td>1.034 ± 0.049</td><td>8.344 ± 0.046</td><td>8.571</td><td>-1.212 ± 0.016</td><td>-0.846 ± 0.012</td><td>1.941 ± 0.014</td><td>0.688</td></tr><tr><td>76</td><td>469-51913-110</td><td>J090106.55+005418.0</td><td>1.192 ± 0.024</td><td>8.183 ± 0.022</td><td>8.307</td><td>-1.443 ± 0.010</td><td>-1.011 ± 0.008</td><td>2.306 ± 0.008</td><td>0.818</td></tr><tr><td>77</td><td>472-51955-546</td><td>J091652.23+003114.1</td><td>1.017 ± 0.042</td><td>8.344 ± 0.043</td><td>8.153</td><td>-1.342 ± 0.009</td><td>-0.882 ± 0.007</td><td>2.087 ± 0.007</td><td>0.733</td></tr><tr><td>78</td><td>474-52000-610</td><td>J092918.38+002813.0</td><td>1.298 ± 0.023</td><td>8.071 ± 0.022</td><td>8.041</td><td>-1.625 ± 0.011</td><td>-1.161 ± 0.009</td><td>2.352 ± 0.009</td><td>0.885</td></tr><tr><td>79</td><td>483-51924-495</td><td>J090004.75+574255.0</td><td>1.037 ± 0.039</td><td>8.322 ± 0.041</td><td>8.724</td><td>-1.059 ± 0.006</td><td>-0.910 ± 0.009</td><td>1.826 ± 0.004</td><td>0.757</td></tr><tr><td>80</td><td>483-51924-594</td><td>J090139.89+575945.9</td><td>1.087 ± 0.040</td><td>8.271 ± 0.036</td><td>8.124</td><td>-1.311 ± 0.009</td><td>-0.788 ± 0.008</td><td>2.047 ± 0.006</td><td>0.698</td></tr><tr><td>81</td><td>489-51930-434</td><td>J103007.42+654756.0</td><td>1.171 ± 0.079</td><td>8.164 ± 0.060</td><td>8.103</td><td>-1.305 ± 0.015</td><td>-0.725 ± 0.010</td><td>2.005 ± 0.012</td><td>0.665</td></tr><tr><td>82</td><td>490-51929-363</td><td>J105506.12+670918.3</td><td>1.188 ± 0.040</td><td>8.150 ± 0.028</td><td>8.094</td><td>-1.338 ± 0.008</td><td>-0.818 ± 0.006</td><td>2.053 ± 0.006</td><td>0.678</td></tr><tr><td>83</td><td>490-51929-396</td><td>J105032.50+661654.1</td><td>1.211 ± 0.038</td><td>8.152 ± 0.030</td><td>8.100</td><td>-1.524 ± 0.014</td><td>-0.945 ± 0.010</td><td>2.353 ± 0.012</td><td>0.786</td></tr><tr><td>84</td><td>493-51957-144</td><td>J121333.58+665053.8</td><td>1.280 ± 0.066</td><td>8.064 ± 0.042</td><td>8.129</td><td>-1.326 ± 0.013</td><td>-0.797 ± 0.009</td><td>2.022 ± 0.009</td><td>0.645</td></tr><tr><td>85</td><td>493-51957-219</td><td>J120821.93+661905.8</td><td>1.217 ± 0.054</td><td>8.138 ± 0.041</td><td>8.097</td><td>-1.439 ± 0.015</td><td>-0.825 ± 0.009</td><td>2.222 ± 0.013</td><td>0.738</td></tr><tr><td>86</td><td>502-51957-7</td><td>J101430.99+004754.9</td><td>1.185 ± 0.024</td><td>8.142 ± 0.021</td><td>8.481</td><td>-1.323 ± 0.007</td><td>-0.939 ± 0.007</td><td>2.112 ± 0.005</td><td>0.784</td></tr><tr><td>87</td><td>505-52317-228</td><td>J103412.22+014248.9</td><td>1.501 ± 0.043</td><td>7.858 ± 0.026</td><td>7.977</td><td>-1.757 ± 0.023</td><td>-1.104 ± 0.012</td><td>2.577 ± 0.021</td><td>0.826</td></tr><tr><td>88</td><td>507-52353-87</td><td>J105331.42+011740.5</td><td>1.231 ± 0.038</td><td>8.130 ± 0.029</td><td>8.112</td><td>-1.496 ± 0.014</td><td>-0.942 ± 0.009</td><td>2.305 ± 0.012</td><td>0.764</td></tr><tr><td>89</td><td>507-52353-347</td><td>J104642.48+022930.1</td><td>1.126 ± 0.060</td><td>8.212 ± 0.047</td><td>8.472</td><td>-1.147 ± 0.008</td><td>-0.752 ± 0.009</td><td>1.804 ± 0.006</td><td>0.618</td></tr><tr><td>90</td><td>509-52374-268</td><td>J110719.03+015909.6</td><td>1.226 ± 0.057</td><td>8.199 ± 0.051</td><td>8.144</td><td>-1.742 ± 0.043</td><td>-1.286 ± 0.040</td><td>2.724 ± 0.041</td><td>0.909</td></tr><tr><td>91</td><td>509-52374-592</td><td>J111224.38+022734.5</td><td>1.517 ± 0.117</td><td>7.903 ± 0.054</td><td>8.408</td><td>-1.049 ± 0.014</td><td>-0.636 ± 0.013</td><td>1.737 ± 0.010</td><td>0.595</td></tr><tr><td>92</td><td>512-51992-524</td><td>J112938.16+031503.9</td><td>1.010 ± 0.060</td><td>8.359 ± 0.057</td><td>8.497</td><td>-1.104 ± 0.008</td><td>-0.713 ± 0.006</td><td>1.730 ± 0.005</td><td>0.585</td></tr><tr><td>93</td><td>513-51989-521</td><td>J113655.80+033333.4</td><td>1.073 ± 0.062</td><td>8.257 ± 0.053</td><td>8.462</td><td>-1.145 ± 0.010</td><td>-0.739 ± 0.010</td><td>1.797 ± 0.008</td><td>0.638</td></tr><tr><td>94</td><td>515-52051-378</td><td>J115117.02+032656.0</td><td>1.134 ± 0.052</td><td>8.237 ± 0.042</td><td>8.304</td><td>-1.236 ± 0.012</td><td>-0.835 ± 0.010</td><td>1.992 ± 0.010</td><td>0.696</td></tr><tr><td>95</td><td>516-52017-403</td><td>J120055.63+032403.9</td><td>1.535 ± 0.029</td><td>7.841 ± 0.022</td><td>7.909</td><td>-1.806 ± 0.019</td><td>-1.257 ± 0.016</td><td>2.691 ± 0.017</td><td>0.906</td></tr><tr><td>96</td><td>519-52283-507</td><td>J122416.44+030036.0</td><td>1.059 ± 0.063</td><td>8.286 ± 0.058</td><td>8.228</td><td>-1.238 ± 0.011</td><td>-0.773 ± 0.012</td><td>1.923 ± 0.009</td><td>0.665</td></tr><tr><td>97</td><td>519-52283-615</td><td>J122948.09+030658.6</td><td>1.203 ± 0.043</td><td>8.112 ± 0.033</td><td>8.048</td><td>-1.359 ± 0.012</td><td>-0.804 ± 0.009</td><td>2.103 ± 0.009</td><td>0.739</td></tr><tr><td>98</td><td>524-52027-16</td><td>J130831.56+012208.0</td><td>1.133 ± 0.036</td><td>8.228 ± 0.032</td><td>8.495</td><td>-1.304 ± 0.008</td><td>-0.928 ± 0.008</td><td>2.103 ± 0.006</td><td>0.761</td></tr><tr><td>99</td><td>524-52027-260</td><td>J130148.03+013718.4</td><td>1.074 ± 0.033</td><td>8.319 ± 0.033</td><td>8.256</td><td>-1.412 ± 0.010</td><td>-0.949 ± 0.009</td><td>2.239 ± 0.008</td><td>0.774</td></tr><tr><td>100</td><td>525-52295-626</td><td>J131710.87+025620.0</td><td>1.146 ± 0.029</td><td>8.218 ± 0.027</td><td>8.273</td><td>-1.421 ± 0.023</td><td>-0.992 ± 0.010</td><td>2.258 ± 0.020</td><td>0.804</td></tr><tr><td>101</td><td>527-52342-247</td><td>J132654.62+011346.9</td><td>1.255 ± 0.023</td><td>8.108 ± 0.020</td><td>8.210</td><td>-1.415 ± 0.010</td><td>-0.999 ± 0.011</td><td>2.273 ± 0.008</td><td>0.823</td></tr><tr><td>102</td><td>530-52026-525</td><td>J135155.89+032524.2</td><td>1.052 ± 0.036</td><td>8.264 ± 0.038</td><td>8.834</td><td>-1.036 ± 0.007</td><td>-0.992 ± 0.015</td><td>1.787 ± 0.005</td><td>0.785</td></tr><tr><td>103</td><td>535-51999-52</td><td>J143210.15+012551.9</td><td>1.086 ± 0.038</td><td>8.243 ± 0.037</td><td>8.823</td><td>-1.167 ± 0.008</td><td>-1.051 ± 0.013</td><td>1.939 ± 0.006</td><td>0.785</td></tr><tr><td>104</td><td>539-52017-356</td><td>J145814.74+020652.2</td><td>1.111 ± 0.050</td><td>8.240 ± 0.041</td><td>8.239</td><td>-1.241 ± 0.008</td><td>-0.773 ± 0.007</td><td>1.950 ± 0.007</td><td>0.666</td></tr></tbody></table>
<table><caption>Table 1. continued.</caption><thead><tr><th>(1)<br>Num</th><th>(2)<br>Plate-MJD-FiberID</th><th>(3)<br>IAU designations</th><th>(4)<br>t<sub>3</sub> (10<sup>4</sup>K)</th><th>(5)<br>12+log(O/H)<sub>T<sub>e</sub></sub></th><th>(6)<br>(O/H)<sub>Bay</sub></th><th>(7)<br>N2</th><th>(8)<br>S2</th><th>(9)<br>O3N2</th><th>(10)<br>P</th></tr></thead><tbody><tr><td>105</td><td>544-52201-67</td><td>J080139.46+382305.2</td><td>1.086 ± 0.036</td><td>8.258 ± 0.036</td><td>8.414</td><td>-1.353 ± 0.010</td><td>-0.947 ± 0.008</td><td>2.141 ± 0.008</td><td>0.781</td></tr><tr><td>106</td><td>544-52201-610</td><td>J080406.22+393656.8</td><td>1.067 ± 0.068</td><td>8.209 ± 0.062</td><td>8.624</td><td>-0.983 ± 0.011</td><td>-0.770 ± 0.010</td><td>1.610 ± 0.009</td><td>0.673</td></tr><tr><td>107</td><td>548-51986-324</td><td>J081829.71+453309.3</td><td>1.339 ± 0.098</td><td>8.011 ± 0.054</td><td>8.163</td><td>-1.227 ± 0.012</td><td>-0.676 ± 0.008</td><td>1.855 ± 0.010</td><td>0.572</td></tr><tr><td>108</td><td>548-51986-347</td><td>J082059.30+461823.4</td><td>1.027 ± 0.043</td><td>8.314 ± 0.043</td><td>8.052</td><td>-1.310 ± 0.008</td><td>-0.810 ± 0.006</td><td>2.026 ± 0.006</td><td>0.715</td></tr><tr><td>109</td><td>549-51981-90</td><td>J083350.23+454933.6</td><td>0.947 ± 0.049</td><td>8.453 ± 0.056</td><td>8.591</td><td>-1.137 ± 0.012</td><td>-0.832 ± 0.009</td><td>1.855 ± 0.011</td><td>0.697</td></tr><tr><td>110</td><td>550-51959-485</td><td>J083914.95+481518.3</td><td>1.188 ± 0.081</td><td>8.130 ± 0.058</td><td>8.248</td><td>-1.175 ± 0.011</td><td>-0.712 ± 0.008</td><td>1.801 ± 0.008</td><td>0.598</td></tr><tr><td>111</td><td>553-51999-134</td><td>J091052.58+522756.5</td><td>1.040 ± 0.043</td><td>8.335 ± 0.039</td><td>8.282</td><td>-1.234 ± 0.007</td><td>-0.777 ± 0.005</td><td>1.915 ± 0.004</td><td>0.628</td></tr><tr><td>112</td><td>555-52266-517</td><td>J093126.23+551221.6</td><td>1.121 ± 0.030</td><td>8.244 ± 0.025</td><td>8.547</td><td>-1.270 ± 0.008</td><td>-0.892 ± 0.007</td><td>2.045 ± 0.006</td><td>0.731</td></tr><tr><td>113</td><td>557-52253-590</td><td>J095513.13+573203.1</td><td>1.169 ± 0.074</td><td>8.152 ± 0.056</td><td>8.603</td><td>-1.148 ± 0.011</td><td>-0.798 ± 0.012</td><td>1.842 ± 0.009</td><td>0.683</td></tr><tr><td>114</td><td>560-52296-204</td><td>J103103.99+585602.0</td><td>1.075 ± 0.066</td><td>8.199 ± 0.054</td><td>8.699</td><td>-0.847 ± 0.006</td><td>-0.727 ± 0.008</td><td>1.381 ± 0.004</td><td>0.565</td></tr><tr><td>115</td><td>564-52224-363</td><td>J084216.95+033806.7</td><td>1.094 ± 0.044</td><td>8.298 ± 0.043</td><td>8.272</td><td>-1.315 ± 0.046</td><td>-1.000 ± 0.018</td><td>2.178 ± 0.044</td><td>0.819</td></tr><tr><td>116</td><td>566-52238-497</td><td>J090531.08+033530.4</td><td>1.484 ± 0.018</td><td>7.871 ± 0.018</td><td>7.914</td><td>-1.758 ± 0.012</td><td>-1.207 ± 0.008</td><td>2.632 ± 0.009</td><td>0.898</td></tr><tr><td>117</td><td>568-52254-244</td><td>J092251.26+025607.4</td><td>1.078 ± 0.049</td><td>8.277 ± 0.041</td><td>8.575</td><td>-1.078 ± 0.007</td><td>-0.747 ± 0.006</td><td>1.765 ± 0.005</td><td>0.648</td></tr><tr><td>118</td><td>569-52264-609</td><td>J093815.91+043408.4</td><td>1.106 ± 0.037</td><td>8.245 ± 0.035</td><td>8.713</td><td>-1.243 ± 0.009</td><td>-0.981 ± 0.008</td><td>2.054 ± 0.007</td><td>0.798</td></tr><tr><td>119</td><td>570-52266-61</td><td>J094646.66+033812.8</td><td>1.145 ± 0.061</td><td>8.220 ± 0.053</td><td>8.557</td><td>-1.196 ± 0.011</td><td>-0.928 ± 0.015</td><td>2.016 ± 0.008</td><td>0.779</td></tr><tr><td>120</td><td>582-52045-445</td><td>J140725.32+052837.9</td><td>1.234 ± 0.028</td><td>8.103 ± 0.025</td><td>8.032</td><td>-1.533 ± 0.012</td><td>-1.059 ± 0.013</td><td>2.373 ± 0.010</td><td>0.834</td></tr><tr><td>121</td><td>587-52026-155</td><td>J144610.32+033921.6</td><td>1.105 ± 0.039</td><td>8.228 ± 0.030</td><td>8.573</td><td>-1.099 ± 0.006</td><td>-0.741 ± 0.007</td><td>1.773 ± 0.004</td><td>0.648</td></tr><tr><td>122</td><td>587-52026-495</td><td>J144441.37+040941.7</td><td>1.679 ± 0.022</td><td>7.841 ± 0.021</td><td>7.930</td><td>-2.036 ± 0.029</td><td>-1.621 ± 0.025</td><td>3.052 ± 0.021</td><td>0.961</td></tr><tr><td>123</td><td>588-52045-483</td><td>J145424.60+035925.0</td><td>1.183 ± 0.051</td><td>8.177 ± 0.036</td><td>8.573</td><td>-1.069 ± 0.009</td><td>-0.803 ± 0.010</td><td>1.799 ± 0.007</td><td>0.671</td></tr><tr><td>124</td><td>589-52055-483</td><td>J150339.41+035051.7</td><td>1.159 ± 0.078</td><td>8.138 ± 0.062</td><td>8.574</td><td>-1.051 ± 0.010</td><td>-0.764 ± 0.009</td><td>1.728 ± 0.007</td><td>0.682</td></tr><tr><td>125</td><td>590-52057-200</td><td>J151045.41+033038.5</td><td>1.094 ± 0.057</td><td>8.272 ± 0.049</td><td>8.213</td><td>-1.231 ± 0.010</td><td>-0.748 ± 0.007</td><td>1.925 ± 0.006</td><td>0.635</td></tr><tr><td>126</td><td>594-52045-493</td><td>J154654.55+030902.1</td><td>1.154 ± 0.025</td><td>8.209 ± 0.022</td><td>8.554</td><td>-1.327 ± 0.009</td><td>-0.971 ± 0.007</td><td>2.150 ± 0.007</td><td>0.788</td></tr><tr><td>127</td><td>597-52059-460</td><td>J113303.79+651341.1</td><td>1.363 ± 0.053</td><td>8.012 ± 0.035</td><td>8.193</td><td>-1.420 ± 0.032</td><td>-1.098 ± 0.041</td><td>2.292 ± 0.030</td><td>0.842</td></tr><tr><td>128</td><td>597-52059-586</td><td>J114047.42+644710.3</td><td>1.102 ± 0.032</td><td>8.274 ± 0.029</td><td>8.313</td><td>-1.345 ± 0.008</td><td>-0.920 ± 0.007</td><td>2.133 ± 0.006</td><td>0.735</td></tr><tr><td>129</td><td>602-52072-19</td><td>J131426.57+633311.5</td><td>1.057 ± 0.052</td><td>8.302 ± 0.048</td><td>8.595</td><td>-1.142 ± 0.007</td><td>-0.833 ± 0.008</td><td>1.854 ± 0.004</td><td>0.681</td></tr><tr><td>130</td><td>605-52353-616</td><td>J141145.34+623911.1</td><td>1.106 ± 0.052</td><td>8.269 ± 0.048</td><td>8.508</td><td>-1.258 ± 0.016</td><td>-0.921 ± 0.029</td><td>2.081 ± 0.014</td><td>0.786</td></tr><tr><td>131</td><td>606-52365-604</td><td>J142619.15+622750.0</td><td>1.048 ± 0.039</td><td>8.328 ± 0.039</td><td>8.559</td><td>-1.329 ± 0.010</td><td>-0.972 ± 0.008</td><td>2.128 ± 0.008</td><td>0.771</td></tr><tr><td>132</td><td>608-52081-255</td><td>J144329.11+585543.6</td><td>1.195 ± 0.084</td><td>8.116 ± 0.064</td><td>8.043</td><td>-1.375 ± 0.014</td><td>-0.816 ± 0.010</td><td>2.079 ± 0.011</td><td>0.695</td></tr><tr><td>133</td><td>609-52339-441</td><td>J144845.84+634620.2</td><td>1.062 ± 0.054</td><td>8.323 ± 0.053</td><td>8.203</td><td>-1.346 ± 0.012</td><td>-0.874 ± 0.019</td><td>2.145 ± 0.010</td><td>0.752</td></tr><tr><td>134</td><td>613-52345-342</td><td>J150728.68+595913.2</td><td>1.138 ± 0.034</td><td>8.164 ± 0.028</td><td>8.759</td><td>-1.039 ± 0.006</td><td>-0.909 ± 0.008</td><td>1.773 ± 0.004</td><td>0.753</td></tr><tr><td>135</td><td>615-52347-606</td><td>J153737.27+584740.5</td><td>1.253 ± 0.053</td><td>8.124 ± 0.041</td><td>8.542</td><td>-1.147 ± 0.046</td><td>-1.027 ± 0.023</td><td>2.023 ± 0.045</td><td>0.833</td></tr><tr><td>136</td><td>616-52374-349</td><td>J153534.13+545534.3</td><td>1.102 ± 0.037</td><td>8.269 ± 0.032</td><td>8.613</td><td>-1.132 ± 0.007</td><td>-0.891 ± 0.011</td><td>1.906 ± 0.005</td><td>0.727</td></tr><tr><td>137</td><td>620-52375-428</td><td>J155829.49+520650.7</td><td>1.032 ± 0.061</td><td>8.285 ± 0.057</td><td>8.621</td><td>-1.031 ± 0.007</td><td>-0.778 ± 0.008</td><td>1.659 ± 0.005</td><td>0.637</td></tr><tr><td>138</td><td>620-52375-506</td><td>J160041.62+514443.0</td><td>1.230 ± 0.060</td><td>8.132 ± 0.047</td><td>8.118</td><td>-1.319 ± 0.017</td><td>-0.742 ± 0.009</td><td>2.075 ± 0.008</td><td>0.696</td></tr><tr><td>139</td><td>621-52055-618</td><td>J161156.30+532630.1</td><td>1.064 ± 0.047</td><td>8.305 ± 0.041</td><td>8.144</td><td>-1.275 ± 0.010</td><td>-0.745 ± 0.007</td><td>1.970 ± 0.008</td><td>0.642</td></tr><tr><td>140</td><td>623-52051-396</td><td>J161031.34+522305.9</td><td>1.405 ± 0.057</td><td>7.905 ± 0.037</td><td>7.929</td><td>-1.628 ± 0.025</td><td>-1.058 ± 0.016</td><td>2.426 ± 0.023</td><td>0.833</td></tr><tr><td>141</td><td>625-52145-72</td><td>J163106.19+484527.0</td><td>1.812 ± 0.177</td><td>7.664 ± 0.058</td><td>8.148</td><td>-1.216 ± 0.017</td><td>-0.632 ± 0.012</td><td>1.810 ± 0.013</td><td>0.550</td></tr><tr><td>142</td><td>627-52144-253</td><td>J163240.72+463338.1</td><td>0.986 ± 0.054</td><td>8.365 ± 0.056</td><td>8.681</td><td>-0.977 ± 0.006</td><td>-0.823 ± 0.009</td><td>1.665 ± 0.005</td><td>0.697</td></tr><tr><td>143</td><td>627-52144-295</td><td>J163055.78+461805.7</td><td>1.052 ± 0.050</td><td>8.329 ± 0.050</td><td>8.566</td><td>-1.184 ± 0.010</td><td>-0.895 ± 0.014</td><td>1.976 ± 0.009</td><td>0.753</td></tr><tr><td>144</td><td>627-52144-446</td><td>J163445.34+465903.1</td><td>1.010 ± 0.040</td><td>8.372 ± 0.043</td><td>8.534</td><td>-1.212 ± 0.011</td><td>-0.853 ± 0.009</td><td>1.980 ± 0.009</td><td>0.741</td></tr><tr><td>145</td><td>628-52083-555</td><td>J164235.52+422349.5</td><td>1.105 ± 0.031</td><td>8.232 ± 0.026</td><td>8.589</td><td>-1.164 ± 0.006</td><td>-0.857 ± 0.007</td><td>1.893 ± 0.004</td><td>0.707</td></tr><tr><td>146</td><td>629-52051-497</td><td>J164359.16+443632.7</td><td>0.957 ± 0.045</td><td>8.473 ± 0.051</td><td>8.481</td><td>-1.260 ± 0.008</td><td>-0.872 ± 0.007</td><td>2.002 ± 0.006</td><td>0.678</td></tr><tr><td>147</td><td>631-52079-307</td><td>J164645.10+413208.8</td><td>1.242 ± 0.091</td><td>8.064 ± 0.066</td><td>8.023</td><td>-1.430 ± 0.019</td><td>-0.826 ± 0.013</td><td>2.154 ± 0.016</td><td>0.725</td></tr><tr><td>148</td><td>633-52079-336</td><td>J165711.23+401915.6</td><td>1.080 ± 0.064</td><td>8.273 ± 0.061</td><td>8.291</td><td>-1.249 ± 0.011</td><td>-0.829 ± 0.009</td><td>2.032 ± 0.009</td><td>0.765</td></tr><tr><td>149</td><td>636-52176-439</td><td>J205430.86-061739.8</td><td>1.217 ± 0.089</td><td>8.116 ± 0.062</td><td>8.300</td><td>-1.142 ± 0.012</td><td>-0.706 ± 0.008</td><td>1.831 ± 0.010</td><td>0.650</td></tr><tr><td>150</td><td>637-52174-399</td><td>J210114.40-055510.2</td><td>1.056 ± 0.029</td><td>8.360 ± 0.029</td><td>8.401</td><td>-1.333 ± 0.011</td><td>-0.905 ± 0.008</td><td>2.165 ± 0.010</td><td>0.759</td></tr><tr><td>151</td><td>639-52146-143</td><td>J211902.28-074226.6</td><td>1.276 ± 0.047</td><td>8.048 ± 0.033</td><td>8.032</td><td>-1.447 ± 0.011</td><td>-0.907 ± 0.010</td><td>2.210 ± 0.009</td><td>0.753</td></tr><tr><td>152</td><td>648-52559-288</td><td>J234148.29-105619.6</td><td>1.049 ± 0.048</td><td>8.279 ± 0.045</td><td>8.163</td><td>-1.223 ± 0.008</td><td>-0.754 ± 0.006</td><td>1.905 ± 0.006</td><td>0.681</td></tr><tr><td>153</td><td>649-52201-637</td><td>J235604.68-085423.4</td><td>1.121 ± 0.044</td><td>8.233 ± 0.040</td><td>8.120</td><td>-1.427 ± 0.016</td><td>-0.933 ± 0.014</td><td>2.227 ± 0.014</td><td>0.778</td></tr><tr><td>154</td><td>651-52141-304</td><td>J000430.34+101129.7</td><td>1.489 ± 0.055</td><td>7.865 ± 0.033</td><td>7.933</td><td>-1.594 ± 0.034</td><td>-1.322 ± 0.047</td><td>2.434 ± 0.033</td><td>0.856</td></tr><tr><td>155</td><td>656-52148-140</td><td>J004645.72+105410.4</td><td>1.128 ± 0.072</td><td>8.283 ± 0.063</td><td>8.290</td><td>-1.346 ± 0.015</td><td>-0.886 ± 0.011</td><td>2.196 ± 0.012</td><td>0.765</td></tr><tr><td>156</td><td>658-52146-17</td><td>J010513.49+103740.8</td><td>1.187 ± 0.041</td><td>8.202 ± 0.035</td><td>8.136</td><td>-1.529 ± 0.014</td><td>-0.978 ± 0.009</td><td>2.377 ± 0.012</td><td>0.780</td></tr><tr><td>157</td><td>659-52199-307</td><td>J010409.91-095346.6</td><td>1.205 ± 0.074</td><td>8.129 ± 0.055</td><td>8.060</td><td>-1.486 ± 0.019</td><td>-0.830 ± 0.011</td><td>2.218 ± 0.017</td><td>0.701</td></tr></tbody></table>
<table><caption>Table 1. continued.</caption><thead><tr><th>(1)<br>Num</th><th>(2)<br>Plate-MJD-FiberID</th><th>(3)<br>IAU designations</th><th>(4)<br>t<sub>3</sub> (10<sup>4</sup>K)</th><th>(5)<br>12+log(O/H)<sub>τ<sub>e</sub></sub></th><th>(6)<br>(O/H)<sub>Bay</sub></th><th>(7)<br>N2</th><th>(8)<br>S2</th><th>(9)<br>O3N2</th><th>(10)<br>P</th></tr></thead><tbody><tr><td>158</td><td>659-52199-435</td><td>J010643.32-092223.1</td><td>1.117 ± 0.059</td><td>8.255 ± 0.054</td><td>8.159</td><td>-1.369 ± 0.016</td><td>-0.871 ± 0.012</td><td>2.171 ± 0.012</td><td>0.755</td></tr><tr><td>159</td><td>660-52177-414</td><td>J011616.82-085021.4</td><td>1.263 ± 0.041</td><td>8.060 ± 0.029</td><td>8.070</td><td>-1.386 ± 0.011</td><td>-0.900 ± 0.008</td><td>2.154 ± 0.009</td><td>0.756</td></tr><tr><td>160</td><td>660-52177-450</td><td>J011729.09-084403.8</td><td>1.045 ± 0.038</td><td>8.305 ± 0.036</td><td>8.567</td><td>-1.139 ± 0.008</td><td>-0.824 ± 0.009</td><td>1.855 ± 0.005</td><td>0.697</td></tr><tr><td>161</td><td>663-52145-406</td><td>J013844.90-083540.5</td><td>1.233 ± 0.046</td><td>8.118 ± 0.033</td><td>8.114</td><td>-1.404 ± 0.013</td><td>-0.860 ± 0.009</td><td>2.184 ± 0.011</td><td>0.738</td></tr><tr><td>162</td><td>664-52174-112</td><td>J014721.67-091646.2</td><td>1.139 ± 0.042</td><td>8.218 ± 0.036</td><td>8.123</td><td>-1.391 ± 0.016</td><td>-0.841 ± 0.013</td><td>2.177 ± 0.014</td><td>0.750</td></tr><tr><td>163</td><td>664-52174-447</td><td>J014713.82-080702.6</td><td>1.251 ± 0.063</td><td>8.056 ± 0.043</td><td>8.038</td><td>-1.388 ± 0.014</td><td>-0.797 ± 0.009</td><td>2.079 ± 0.011</td><td>0.682</td></tr><tr><td>164</td><td>666-52149-532</td><td>J020356.90-080758.4</td><td>1.027 ± 0.048</td><td>8.307 ± 0.043</td><td>8.594</td><td>-1.091 ± 0.007</td><td>-0.759 ± 0.007</td><td>1.748 ± 0.006</td><td>0.653</td></tr><tr><td>165</td><td>668-52162-89</td><td>J022037.66-092907.4</td><td>1.220 ± 0.028</td><td>8.140 ± 0.023</td><td>8.407</td><td>-1.144 ± 0.006</td><td>-0.985 ± 0.007</td><td>1.973 ± 0.005</td><td>0.793</td></tr><tr><td>166</td><td>716-52203-368</td><td>J215637.75-070007.9</td><td>1.198 ± 0.082</td><td>8.110 ± 0.058</td><td>8.352</td><td>-1.138 ± 0.009</td><td>-0.710 ± 0.008</td><td>1.732 ± 0.007</td><td>0.574</td></tr><tr><td>167</td><td>726-52226-532</td><td>J231322.68-084503.9</td><td>1.080 ± 0.068</td><td>8.274 ± 0.056</td><td>8.484</td><td>-1.081 ± 0.008</td><td>-0.686 ± 0.007</td><td>1.706 ± 0.006</td><td>0.576</td></tr><tr><td>168</td><td>730-52466-376</td><td>J212442.05+114751.0</td><td>1.014 ± 0.037</td><td>8.324 ± 0.036</td><td>8.610</td><td>-1.007 ± 0.005</td><td>-0.816 ± 0.005</td><td>1.687 ± 0.003</td><td>0.682</td></tr><tr><td>169</td><td>735-52519-461</td><td>J220802.88+131334.6</td><td>1.192 ± 0.041</td><td>8.127 ± 0.033</td><td>8.485</td><td>-1.295 ± 0.009</td><td>-0.908 ± 0.008</td><td>2.064 ± 0.007</td><td>0.768</td></tr><tr><td>170</td><td>740-52263-267</td><td>J224422.71+131608.7</td><td>1.021 ± 0.063</td><td>8.338 ± 0.062</td><td>8.544</td><td>-1.150 ± 0.010</td><td>-0.776 ± 0.007</td><td>1.846 ± 0.008</td><td>0.673</td></tr><tr><td>171</td><td>753-52233-593</td><td>J002652.08+152737.8</td><td>1.273 ± 0.066</td><td>8.048 ± 0.049</td><td>8.722</td><td>-1.249 ± 0.031</td><td>-1.026 ± 0.027</td><td>2.081 ± 0.028</td><td>0.845</td></tr><tr><td>172</td><td>755-52235-300</td><td>J073928.39+314502.1</td><td>1.086 ± 0.039</td><td>8.264 ± 0.037</td><td>8.063</td><td>-1.367 ± 0.009</td><td>-0.810 ± 0.006</td><td>2.130 ± 0.007</td><td>0.743</td></tr><tr><td>173</td><td>756-52577-37</td><td>J075507.92+340827.6</td><td>1.146 ± 0.035</td><td>8.185 ± 0.030</td><td>8.729</td><td>-1.012 ± 0.006</td><td>-0.876 ± 0.009</td><td>1.778 ± 0.005</td><td>0.758</td></tr><tr><td>174</td><td>761-52266-443</td><td>J082542.86+422758.6</td><td>1.342 ± 0.025</td><td>8.032 ± 0.018</td><td>8.117</td><td>-1.506 ± 0.011</td><td>-0.945 ± 0.012</td><td>2.339 ± 0.009</td><td>0.788</td></tr><tr><td>175</td><td>761-52266-454</td><td>J082614.16+422833.6</td><td>1.123 ± 0.074</td><td>8.241 ± 0.057</td><td>8.431</td><td>-1.097 ± 0.009</td><td>-0.694 ± 0.007</td><td>1.725 ± 0.007</td><td>0.560</td></tr><tr><td>176</td><td>762-52232-217</td><td>J083343.87+431951.6</td><td>1.002 ± 0.058</td><td>8.363 ± 0.056</td><td>8.157</td><td>-1.207 ± 0.008</td><td>-0.705 ± 0.007</td><td>1.852 ± 0.006</td><td>0.614</td></tr><tr><td>177</td><td>762-52232-575</td><td>J083803.72+445900.2</td><td>1.205 ± 0.050</td><td>8.099 ± 0.036</td><td>8.598</td><td>-1.186 ± 0.011</td><td>-0.821 ± 0.010</td><td>1.876 ± 0.009</td><td>0.689</td></tr><tr><td>178</td><td>767-52252-463</td><td>J092429.86+514301.2</td><td>1.208 ± 0.048</td><td>8.117 ± 0.032</td><td>8.124</td><td>-1.284 ± 0.009</td><td>-0.740 ± 0.006</td><td>1.960 ± 0.007</td><td>0.644</td></tr><tr><td>179</td><td>768-52281-193</td><td>J093733.77+523924.8</td><td>1.114 ± 0.068</td><td>8.237 ± 0.054</td><td>8.290</td><td>-1.197 ± 0.009</td><td>-0.743 ± 0.007</td><td>1.851 ± 0.007</td><td>0.603</td></tr><tr><td>180</td><td>769-52282-100</td><td>J095131.78+525936.2</td><td>1.268 ± 0.021</td><td>8.087 ± 0.021</td><td>8.027</td><td>-1.599 ± 0.009</td><td>-1.103 ± 0.006</td><td>2.468 ± 0.007</td><td>0.849</td></tr><tr><td>181</td><td>769-52282-575</td><td>J095408.42+544606.9</td><td>1.069 ± 0.040</td><td>8.318 ± 0.037</td><td>8.366</td><td>-1.247 ± 0.034</td><td>-0.874 ± 0.009</td><td>2.023 ± 0.032</td><td>0.719</td></tr><tr><td>182</td><td>771-52370-490</td><td>J101242.98+613302.8</td><td>1.123 ± 0.030</td><td>8.248 ± 0.028</td><td>8.105</td><td>-1.453 ± 0.009</td><td>-0.914 ± 0.007</td><td>2.257 ± 0.007</td><td>0.757</td></tr><tr><td>183</td><td>772-52375-270</td><td>J102132.50+614404.5</td><td>1.277 ± 0.067</td><td>8.086 ± 0.045</td><td>8.303</td><td>-1.263 ± 0.014</td><td>-0.872 ± 0.012</td><td>2.031 ± 0.011</td><td>0.709</td></tr><tr><td>184</td><td>773-52376-143</td><td>J104500.96+621527.3</td><td>1.269 ± 0.083</td><td>8.058 ± 0.048</td><td>8.594</td><td>-0.691 ± 0.005</td><td>-0.477 ± 0.006</td><td>1.218 ± 0.003</td><td>0.491</td></tr><tr><td>185</td><td>775-52295-291</td><td>J111439.19+605418.3</td><td>1.163 ± 0.039</td><td>8.199 ± 0.030</td><td>8.311</td><td>-1.284 ± 0.009</td><td>-0.850 ± 0.007</td><td>2.034 ± 0.007</td><td>0.693</td></tr><tr><td>186</td><td>779-52342-355</td><td>J120725.66+623458.0</td><td>0.993 ± 0.043</td><td>8.310 ± 0.043</td><td>8.709</td><td>-0.970 ± 0.006</td><td>-0.830 ± 0.006</td><td>1.579 ± 0.003</td><td>0.652</td></tr><tr><td>187</td><td>782-52320-22</td><td>J130445.62+622420.8</td><td>0.961 ± 0.042</td><td>8.382 ± 0.045</td><td>8.695</td><td>-0.936 ± 0.005</td><td>-0.813 ± 0.005</td><td>1.580 ± 0.003</td><td>0.663</td></tr><tr><td>188</td><td>784-52327-179</td><td>J132002.90+616427.4</td><td>1.247 ± 0.088</td><td>8.109 ± 0.059</td><td>8.196</td><td>-1.247 ± 0.015</td><td>-0.769 ± 0.011</td><td>1.937 ± 0.012</td><td>0.624</td></tr><tr><td>189</td><td>792-52353-110</td><td>J150127.22+553126.3</td><td>1.113 ± 0.072</td><td>8.255 ± 0.059</td><td>8.160</td><td>-1.284 ± 0.012</td><td>-0.741 ± 0.009</td><td>1.952 ± 0.009</td><td>0.601</td></tr><tr><td>190</td><td>794-52376-460</td><td>J152045.65+533807.0</td><td>1.070 ± 0.054</td><td>8.326 ± 0.054</td><td>8.421</td><td>-1.246 ± 0.019</td><td>-0.887 ± 0.015</td><td>2.072 ± 0.015</td><td>0.770</td></tr><tr><td>191</td><td>817-52381-424</td><td>J163210.01+412055.6</td><td>1.105 ± 0.043</td><td>8.226 ± 0.036</td><td>8.487</td><td>-1.164 ± 0.009</td><td>-0.771 ± 0.009</td><td>1.856 ± 0.006</td><td>0.672</td></tr><tr><td>192</td><td>828-52317-319</td><td>J083145.67+384756.7</td><td>1.107 ± 0.067</td><td>8.257 ± 0.059</td><td>8.188</td><td>-1.310 ± 0.014</td><td>-0.846 ± 0.013</td><td>2.074 ± 0.011</td><td>0.718</td></tr><tr><td>193</td><td>834-52316-157</td><td>J093855.90+471228.8</td><td>1.100 ± 0.053</td><td>8.259 ± 0.047</td><td>8.096</td><td>-1.384 ± 0.011</td><td>-0.810 ± 0.008</td><td>2.121 ± 0.009</td><td>0.695</td></tr><tr><td>194</td><td>836-52376-378</td><td>J112145.51+055756.5</td><td>1.066 ± 0.039</td><td>8.300 ± 0.042</td><td>8.537</td><td>-1.298 ± 0.010</td><td>-0.934 ± 0.011</td><td>2.129 ± 0.008</td><td>0.821</td></tr><tr><td>195</td><td>838-52378-595</td><td>J111435.54+052154.7</td><td>1.459 ± 0.033</td><td>7.881 ± 0.024</td><td>8.717</td><td>-1.457 ± 0.014</td><td>-1.172 ± 0.013</td><td>2.288 ± 0.011</td><td>0.854</td></tr><tr><td>196</td><td>841-52375-333</td><td>J115641.37+054315.6</td><td>1.082 ± 0.067</td><td>8.251 ± 0.059</td><td>8.567</td><td>-1.120 ± 0.009</td><td>-0.755 ± 0.008</td><td>1.793 ± 0.007</td><td>0.655</td></tr><tr><td>197</td><td>845-52381-1</td><td>J123523.86+034536.0</td><td>1.099 ± 0.049</td><td>8.255 ± 0.044</td><td>8.159</td><td>-1.332 ± 0.011</td><td>-0.828 ± 0.018</td><td>2.094 ± 0.008</td><td>0.732</td></tr><tr><td>198</td><td>846-52407-267</td><td>J123538.74+041245.0</td><td>1.113 ± 0.041</td><td>8.260 ± 0.034</td><td>8.420</td><td>-1.246 ± 0.007</td><td>-0.826 ± 0.006</td><td>1.997 ± 0.005</td><td>0.691</td></tr><tr><td>199</td><td>847-52426-522</td><td>J124954.84+060610.4</td><td>1.105 ± 0.035</td><td>8.230 ± 0.029</td><td>8.338</td><td>-1.233 ± 0.007</td><td>-0.799 ± 0.006</td><td>1.932 ± 0.005</td><td>0.676</td></tr><tr><td>200</td><td>848-52669-528</td><td>J125657.58+055616.4</td><td>0.949 ± 0.055</td><td>8.368 ± 0.059</td><td>8.678</td><td>-0.972 ± 0.006</td><td>-0.790 ± 0.007</td><td>1.542 ± 0.003</td><td>0.611</td></tr><tr><td>201</td><td>853-52374-577</td><td>J133810.13+053504.5</td><td>1.000 ± 0.055</td><td>8.332 ± 0.054</td><td>8.672</td><td>-1.030 ± 0.006</td><td>-0.819 ± 0.006</td><td>1.640 ± 0.004</td><td>0.616</td></tr><tr><td>202</td><td>857-52314-386</td><td>J074034.66+244136.6</td><td>1.096 ± 0.038</td><td>8.277 ± 0.035</td><td>8.366</td><td>-1.312 ± 0.029</td><td>-0.944 ± 0.012</td><td>2.117 ± 0.027</td><td>0.763</td></tr><tr><td>203</td><td>859-52317-70</td><td>J080000.70+274641.8</td><td>1.117 ± 0.031</td><td>8.269 ± 0.030</td><td>8.189</td><td>-1.408 ± 0.009</td><td>-0.939 ± 0.007</td><td>2.245 ± 0.006</td><td>0.781</td></tr><tr><td>204</td><td>864-52320-379</td><td>J083833.53+374216.5</td><td>1.137 ± 0.064</td><td>8.239 ± 0.059</td><td>8.416</td><td>-1.415 ± 0.034</td><td>-1.141 ± 0.039</td><td>2.306 ± 0.032</td><td>0.862</td></tr><tr><td>205</td><td>870-52325-321</td><td>J092600.41+442736.0</td><td>1.268 ± 0.029</td><td>8.094 ± 0.023</td><td>8.459</td><td>-1.409 ± 0.011</td><td>-1.020 ± 0.011</td><td>2.257 ± 0.009</td><td>0.813</td></tr><tr><td>206</td><td>879-52365-14</td><td>J113247.69+510215.3</td><td>1.260 ± 0.046</td><td>8.087 ± 0.034</td><td>8.724</td><td>-1.305 ± 0.016</td><td>-1.047 ± 0.010</td><td>2.116 ± 0.014</td><td>0.785</td></tr><tr><td>207</td><td>881-52368-567</td><td>J115240.85+533228.3</td><td>0.997 ± 0.049</td><td>8.303 ± 0.051</td><td>8.603</td><td>-0.986 ± 0.006</td><td>-0.737 ± 0.006</td><td>1.627 ± 0.004</td><td>0.692</td></tr><tr><td>208</td><td>884-52374-404</td><td>J122611.16+532602.0</td><td>1.497 ± 0.027</td><td>7.853 ± 0.022</td><td>7.937</td><td>-1.858 ± 0.019</td><td>-1.138 ± 0.009</td><td>2.696 ± 0.015</td><td>0.861</td></tr><tr><td>209</td><td>886-52381-129</td><td>J125427.22+510436.1</td><td>1.197 ± 0.083</td><td>8.153 ± 0.061</td><td>8.184</td><td>-1.267 ± 0.013</td><td>-0.779 ± 0.010</td><td>1.982 ± 0.010</td><td>0.661</td></tr><tr><td>210</td><td>886-52381-605</td><td>J125931.51+531554.0</td><td>1.044 ± 0.049</td><td>8.305 ± 0.046</td><td>8.601</td><td>-1.092 ± 0.008</td><td>-0.815 ± 0.008</td><td>1.787 ± 0.006</td><td>0.678</td></tr></tbody></table>
<table><caption>Table 1. continued.</caption><thead><tr><th>(1)<br>Num</th><th>(2)<br>Plate-MJD-FiberID</th><th>(3)<br>IAU designations</th><th>(4)<br>t<sub>3</sub> (10<sup>4</sup>K)</th><th>(5)<br>12+log(O/H)<sub>τ<sub>e</sub></sub></th><th>(6)<br>(O/H)<sub>Bay</sub></th><th>(7)<br>N2</th><th>(8)<br>S2</th><th>(9)<br>O3N2</th><th>(10)<br>P</th></tr></thead><tbody><tr><td>211</td><td>890-52583-49</td><td>J075308.57+304512.6</td><td>1.039 ± 0.044</td><td>8.356 ± 0.045</td><td>8.227</td><td>-1.299 ± 0.010</td><td>-0.839 ± 0.009</td><td>2.093 ± 0.008</td><td>0.742</td></tr><tr><td>212</td><td>890-52583-65</td><td>J075454.69+312821.0</td><td>1.057 ± 0.063</td><td>8.332 ± 0.063</td><td>8.336</td><td>-1.352 ± 0.016</td><td>-0.943 ± 0.011</td><td>2.178 ± 0.014</td><td>0.783</td></tr><tr><td>213</td><td>893-52589-76</td><td>J082010.56+374354.4</td><td>1.366 ± 0.081</td><td>8.022 ± 0.046</td><td>8.171</td><td>-1.315 ± 0.016</td><td>-0.764 ± 0.010</td><td>2.055 ± 0.014</td><td>0.657</td></tr><tr><td>214</td><td>893-52589-177</td><td>J081755.35+372959.6</td><td>1.137 ± 0.066</td><td>8.170 ± 0.048</td><td>8.501</td><td>-1.073 ± 0.007</td><td>-0.676 ± 0.006</td><td>1.626 ± 0.004</td><td>0.541</td></tr><tr><td>215</td><td>896-52592-125</td><td>J084419.08+414310.2</td><td>1.063 ± 0.039</td><td>8.256 ± 0.035</td><td>8.714</td><td>-0.925 ± 0.005</td><td>-0.832 ± 0.007</td><td>1.614 ± 0.003</td><td>0.696</td></tr><tr><td>216</td><td>901-52641-536</td><td>J093816.85+504200.0</td><td>1.253 ± 0.038</td><td>8.101 ± 0.027</td><td>8.260</td><td>-1.341 ± 0.015</td><td>-0.903 ± 0.013</td><td>2.124 ± 0.012</td><td>0.736</td></tr><tr><td>217</td><td>902-52409-135</td><td>J094903.36+500126.0</td><td>1.091 ± 0.037</td><td>8.256 ± 0.034</td><td>8.608</td><td>-1.058 ± 0.006</td><td>-0.844 ± 0.008</td><td>1.816 ± 0.004</td><td>0.743</td></tr><tr><td>218</td><td>903-52400-600</td><td>J100751.67+525624.0</td><td>1.216 ± 0.050</td><td>8.105 ± 0.034</td><td>8.076</td><td>-1.396 ± 0.017</td><td>-0.802 ± 0.008</td><td>2.070 ± 0.014</td><td>0.648</td></tr><tr><td>219</td><td>904-52381-501</td><td>J102024.05+540043.9</td><td>1.078 ± 0.044</td><td>8.272 ± 0.045</td><td>8.162</td><td>-1.374 ± 0.011</td><td>-0.907 ± 0.009</td><td>2.162 ± 0.008</td><td>0.780</td></tr><tr><td>220</td><td>908-52373-27</td><td>J111558.18+554806.4</td><td>1.175 ± 0.037</td><td>8.166 ± 0.028</td><td>8.334</td><td>-1.237 ± 0.007</td><td>-0.800 ± 0.006</td><td>1.946 ± 0.004</td><td>0.667</td></tr><tr><td>221</td><td>909-52379-616</td><td>J112313.30+570327.7</td><td>1.362 ± 0.027</td><td>7.966 ± 0.021</td><td>8.004</td><td>-1.747 ± 0.022</td><td>-1.072 ± 0.010</td><td>2.562 ± 0.020</td><td>0.823</td></tr><tr><td>222</td><td>915-52443-598</td><td>J140539.17-015334.4</td><td>1.160 ± 0.068</td><td>8.192 ± 0.054</td><td>8.146</td><td>-1.312 ± 0.011</td><td>-0.818 ± 0.008</td><td>2.058 ± 0.007</td><td>0.699</td></tr><tr><td>223</td><td>926-52413-279</td><td>J153804.80+014940.8</td><td>1.072 ± 0.063</td><td>8.320 ± 0.060</td><td>8.352</td><td>-1.294 ± 0.008</td><td>-0.860 ± 0.007</td><td>2.074 ± 0.006</td><td>0.716</td></tr><tr><td>224</td><td>927-52577-514</td><td>J074553.04+231017.0</td><td>1.080 ± 0.048</td><td>8.248 ± 0.041</td><td>8.681</td><td>-0.981 ± 0.007</td><td>-0.838 ± 0.011</td><td>1.669 ± 0.006</td><td>0.681</td></tr><tr><td>225</td><td>934-52672-483</td><td>J084725.06+355451.4</td><td>1.069 ± 0.025</td><td>8.326 ± 0.025</td><td>8.570</td><td>-1.248 ± 0.008</td><td>-0.923 ± 0.008</td><td>2.071 ± 0.006</td><td>0.771</td></tr><tr><td>226</td><td>936-52705-477</td><td>J085949.13+380632.0</td><td>1.260 ± 0.032</td><td>8.113 ± 0.027</td><td>8.118</td><td>-1.512 ± 0.014</td><td>-0.988 ± 0.010</td><td>2.384 ± 0.012</td><td>0.830</td></tr><tr><td>227</td><td>937-52707-275</td><td>J090741.52+385202.2</td><td>1.107 ± 0.066</td><td>8.212 ± 0.055</td><td>8.610</td><td>-1.141 ± 0.009</td><td>-0.797 ± 0.009</td><td>1.809 ± 0.006</td><td>0.659</td></tr><tr><td>228</td><td>940-52670-594</td><td>J094330.67+422142.8</td><td>1.013 ± 0.058</td><td>8.367 ± 0.059</td><td>8.429</td><td>-1.116 ± 0.009</td><td>-0.730 ± 0.008</td><td>1.836 ± 0.009</td><td>0.680</td></tr><tr><td>229</td><td>945-52652-423</td><td>J095859.35+552415.8</td><td>1.161 ± 0.040</td><td>8.184 ± 0.033</td><td>8.214</td><td>-1.266 ± 0.010</td><td>-0.808 ± 0.007</td><td>2.046 ± 0.008</td><td>0.752</td></tr><tr><td>230</td><td>949-52427-359</td><td>J104337.66+580820.7</td><td>1.235 ± 0.040</td><td>8.322 ± 0.076</td><td>8.049</td><td>-1.497 ± 0.013</td><td>-0.996 ± 0.010</td><td>2.291 ± 0.011</td><td>0.523</td></tr><tr><td>231</td><td>952-52409-264</td><td>J112509.46+584700.9</td><td>1.004 ± 0.046</td><td>8.360 ± 0.046</td><td>8.612</td><td>-1.153 ± 0.007</td><td>-0.839 ± 0.006</td><td>1.842 ± 0.004</td><td>0.667</td></tr><tr><td>232</td><td>952-52409-439</td><td>J112555.10+593319.0</td><td>1.235 ± 0.025</td><td>8.157 ± 0.016</td><td>8.197</td><td>-1.347 ± 0.009</td><td>-0.817 ± 0.006</td><td>2.133 ± 0.007</td><td>0.695</td></tr><tr><td>233</td><td>952-52409-447</td><td>J113116.49+601229.5</td><td>1.105 ± 0.058</td><td>8.224 ± 0.053</td><td>8.103</td><td>-1.343 ± 0.013</td><td>-0.871 ± 0.011</td><td>2.098 ± 0.011</td><td>0.753</td></tr><tr><td>234</td><td>955-52409-383</td><td>J121142.86+603626.6</td><td>1.166 ± 0.054</td><td>8.204 ± 0.045</td><td>8.235</td><td>-1.295 ± 0.013</td><td>-0.823 ± 0.012</td><td>2.121 ± 0.011</td><td>0.779</td></tr><tr><td>235</td><td>956-52401-20</td><td>J124340.29+590311.1</td><td>1.071 ± 0.070</td><td>8.309 ± 0.063</td><td>8.258</td><td>-1.234 ± 0.015</td><td>-0.759 ± 0.009</td><td>1.950 ± 0.006</td><td>0.652</td></tr><tr><td>236</td><td>956-52401-347</td><td>J122630.60+595712.6</td><td>1.126 ± 0.063</td><td>8.235 ± 0.057</td><td>8.144</td><td>-1.429 ± 0.024</td><td>-0.930 ± 0.013</td><td>2.240 ± 0.022</td><td>0.778</td></tr><tr><td>237</td><td>957-52398-210</td><td>J125328.61+584021.7</td><td>1.114 ± 0.027</td><td>8.272 ± 0.027</td><td>8.306</td><td>-1.375 ± 0.009</td><td>-0.930 ± 0.007</td><td>2.211 ± 0.006</td><td>0.785</td></tr><tr><td>238</td><td>957-52398-530</td><td>J125856.26+604730.8</td><td>1.074 ± 0.045</td><td>8.289 ± 0.044</td><td>8.297</td><td>-1.319 ± 0.012</td><td>-0.889 ± 0.009</td><td>2.105 ± 0.009</td><td>0.759</td></tr><tr><td>239</td><td>959-52411-137</td><td>J132455.03+574510.7</td><td>1.163 ± 0.028</td><td>8.219 ± 0.028</td><td>8.760</td><td>-1.281 ± 0.009</td><td>-1.056 ± 0.010</td><td>2.152 ± 0.007</td><td>0.824</td></tr><tr><td>240</td><td>963-52643-165</td><td>J105315.89+471517.2</td><td>1.289 ± 0.057</td><td>8.083 ± 0.034</td><td>8.472</td><td>-1.127 ± 0.009</td><td>-0.748 ± 0.008</td><td>1.815 ± 0.006</td><td>0.608</td></tr><tr><td>241</td><td>964-52646-570</td><td>J110918.05+494753.8</td><td>1.109 ± 0.030</td><td>8.249 ± 0.025</td><td>8.453</td><td>-1.169 ± 0.007</td><td>-0.780 ± 0.006</td><td>1.890 ± 0.005</td><td>0.674</td></tr><tr><td>242</td><td>969-52442-354</td><td>J115630.62+500822.2</td><td>1.156 ± 0.036</td><td>8.147 ± 0.029</td><td>8.764</td><td>-1.040 ± 0.007</td><td>-0.950 ± 0.013</td><td>1.772 ± 0.005</td><td>0.748</td></tr><tr><td>243</td><td>971-52644-599</td><td>J123153.64+500056.5</td><td>1.105 ± 0.057</td><td>8.192 ± 0.048</td><td>8.673</td><td>-1.000 ± 0.007</td><td>-0.824 ± 0.010</td><td>1.664 ± 0.004</td><td>0.680</td></tr><tr><td>244</td><td>972-52435-370</td><td>J165844.50+351923.1</td><td>1.108 ± 0.035</td><td>8.251 ± 0.030</td><td>8.329</td><td>-1.248 ± 0.008</td><td>-0.822 ± 0.007</td><td>2.011 ± 0.006</td><td>0.724</td></tr><tr><td>245</td><td>978-52441-408</td><td>J171400.93+313023.4</td><td>1.053 ± 0.043</td><td>8.309 ± 0.039</td><td>8.621</td><td>-1.032 ± 0.007</td><td>-0.841 ± 0.013</td><td>1.746 ± 0.006</td><td>0.681</td></tr><tr><td>246</td><td>979-52427-83</td><td>J172006.75+255827.4</td><td>1.110 ± 0.066</td><td>8.223 ± 0.054</td><td>8.219</td><td>-1.214 ± 0.014</td><td>-0.760 ± 0.010</td><td>1.903 ± 0.012</td><td>0.664</td></tr><tr><td>247</td><td>984-52442-263</td><td>J205510.41-001903.0</td><td>1.063 ± 0.065</td><td>8.235 ± 0.053</td><td>8.740</td><td>-0.812 ± 0.005</td><td>-0.709 ± 0.006</td><td>1.354 ± 0.004</td><td>0.558</td></tr><tr><td>248</td><td>987-52523-394</td><td>J211958.32+005233.6</td><td>1.145 ± 0.039</td><td>8.235 ± 0.037</td><td>8.138</td><td>-1.449 ± 0.012</td><td>-0.947 ± 0.009</td><td>2.303 ± 0.010</td><td>0.806</td></tr><tr><td>249</td><td>987-52523-440</td><td>J212043.97+010006.8</td><td>1.025 ± 0.058</td><td>8.335 ± 0.055</td><td>8.513</td><td>-1.064 ± 0.007</td><td>-0.722 ± 0.006</td><td>1.722 ± 0.002</td><td>0.624</td></tr><tr><td>250</td><td>988-52520-456</td><td>J212829.71+003021.9</td><td>1.100 ± 0.067</td><td>8.229 ± 0.053</td><td>8.274</td><td>-1.139 ± 0.009</td><td>-0.664 ± 0.007</td><td>1.753 ± 0.006</td><td>0.588</td></tr><tr><td>251</td><td>992-52644-19</td><td>J093625.35+050332.0</td><td>1.362 ± 0.036</td><td>8.015 ± 0.028</td><td>8.118</td><td>-1.516 ± 0.013</td><td>-1.050 ± 0.014</td><td>2.396 ± 0.011</td><td>0.844</td></tr><tr><td>252</td><td>997-52734-474</td><td>J101637.77+065214.5</td><td>1.184 ± 0.079</td><td>8.140 ± 0.060</td><td>8.078</td><td>-1.375 ± 0.017</td><td>-0.793 ± 0.011</td><td>2.069 ± 0.014</td><td>0.668</td></tr><tr><td>253</td><td>999-52636-150</td><td>J103404.17+061210.4</td><td>1.156 ± 0.036</td><td>8.185 ± 0.030</td><td>8.587</td><td>-1.217 ± 0.008</td><td>-0.911 ± 0.007</td><td>1.991 ± 0.006</td><td>0.754</td></tr><tr><td>254</td><td>1001-52670-385</td><td>J104727.84+072238.2</td><td>0.983 ± 0.055</td><td>8.342 ± 0.060</td><td>8.847</td><td>-0.909 ± 0.007</td><td>-0.919 ± 0.016</td><td>1.587 ± 0.005</td><td>0.711</td></tr><tr><td>255</td><td>1001-52670-611</td><td>J105445.74+073731.8</td><td>1.127 ± 0.058</td><td>8.230 ± 0.047</td><td>8.479</td><td>-1.173 ± 0.037</td><td>-0.836 ± 0.014</td><td>1.897 ± 0.035</td><td>0.677</td></tr><tr><td>256</td><td>1002-52646-525</td><td>J105854.79+080043.9</td><td>0.917 ± 0.051</td><td>8.503 ± 0.064</td><td>8.578</td><td>-1.198 ± 0.008</td><td>-0.851 ± 0.008</td><td>1.931 ± 0.006</td><td>0.711</td></tr><tr><td>257</td><td>1005-52703-268</td><td>J094422.13+480130.3</td><td>1.446 ± 0.045</td><td>7.958 ± 0.033</td><td>8.055</td><td>-1.813 ± 0.027</td><td>-1.169 ± 0.016</td><td>2.721 ± 0.023</td><td>0.866</td></tr><tr><td>258</td><td>1007-52706-225</td><td>J100912.50+500604.6</td><td>1.339 ± 0.108</td><td>7.910 ± 0.063</td><td>8.660</td><td>-0.946 ± 0.009</td><td>-0.746 ± 0.010</td><td>1.532 ± 0.006</td><td>0.636</td></tr><tr><td>259</td><td>1008-52707-430</td><td>J101855.46+515527.8</td><td>1.267 ± 0.033</td><td>8.097 ± 0.024</td><td>8.153</td><td>-1.418 ± 0.011</td><td>-0.932 ± 0.012</td><td>2.232 ± 0.009</td><td>0.765</td></tr><tr><td>260</td><td>1013-52707-229</td><td>J111824.48+540115.9</td><td>1.188 ± 0.086</td><td>8.226 ± 0.071</td><td>8.166</td><td>-1.562 ± 0.027</td><td>-1.002 ± 0.019</td><td>2.439 ± 0.024</td><td>0.785</td></tr><tr><td>261</td><td>1014-52707-393</td><td>J112544.09+550532.2</td><td>1.039 ± 0.066</td><td>8.275 ± 0.062</td><td>8.688</td><td>-0.990 ± 0.007</td><td>-0.815 ± 0.008</td><td>1.631 ± 0.005</td><td>0.656</td></tr><tr><td>262</td><td>1020-52721-287</td><td>J122842.45+535723.0</td><td>1.183 ± 0.052</td><td>8.166 ± 0.047</td><td>8.131</td><td>-1.455 ± 0.014</td><td>-0.965 ± 0.011</td><td>2.308 ± 0.012</td><td>0.842</td></tr><tr><td>263</td><td>1021-52460-446</td><td>J204018.05+010324.4</td><td>1.075 ± 0.064</td><td>8.253 ± 0.058</td><td>8.536</td><td>-1.156 ± 0.009</td><td>-0.782 ± 0.007</td><td>1.871 ± 0.007</td><td>0.714</td></tr></tbody></table>
<table><caption>Table 1. continued.</caption><thead><tr><th>(1)</th><th>(2)</th><th>(3)</th><th>(4)</th><th>(5)</th><th>(6)</th><th>(7)</th><th>(8)</th><th>(9)</th><th>(10)</th></tr><tr><th>Num</th><th>Plate-MJD-FiberID</th><th>IAU designations</th><th>t<sub>3</sub> (10<sup>4</sup>K)</th><th>12+log(O/H)<sub>T<sub>e</sub></sub></th><th>(O/H)<sub>Bay</sub></th><th>N2</th><th>S2</th><th>O3N2</th><th>P</th></tr></thead><tbody><tr><td>264</td><td>1024-52826-106</td><td>J210134.44-002846.9</td><td>1.401 ± 0.099</td><td>7.982 ± 0.056</td><td>8.150</td><td>-1.370 ± 0.027</td><td>-0.824 ± 0.024</td><td>2.159 ± 0.025</td><td>0.726</td></tr><tr><td>265</td><td>1026-52558-122</td><td>J211451.48-011046.2</td><td>1.142 ± 0.062</td><td>8.210 ± 0.051</td><td>8.109</td><td>-1.378 ± 0.018</td><td>-0.823 ± 0.009</td><td>2.133 ± 0.016</td><td>0.714</td></tr><tr><td>266</td><td>1026-52558-596</td><td>J211829.85+003059.4</td><td>1.262 ± 0.041</td><td>8.102 ± 0.029</td><td>8.395</td><td>-1.320 ± 0.017</td><td>-0.904 ± 0.013</td><td>2.136 ± 0.015</td><td>0.771</td></tr><tr><td>267</td><td>1028-52562-373</td><td>J212705.80+005827.1</td><td>1.362 ± 0.041</td><td>8.011 ± 0.027</td><td>8.079</td><td>-1.647 ± 0.023</td><td>-0.993 ± 0.011</td><td>2.475 ± 0.021</td><td>0.781</td></tr><tr><td>268</td><td>1028-52562-388</td><td>J212702.90+002701.8</td><td>1.011 ± 0.056</td><td>8.357 ± 0.059</td><td>8.464</td><td>-1.256 ± 0.012</td><td>-0.872 ± 0.009</td><td>2.002 ± 0.010</td><td>0.728</td></tr><tr><td>269</td><td>1028-52562-422</td><td>J212829.71+003021.9</td><td>1.004 ± 0.061</td><td>8.351 ± 0.058</td><td>8.187</td><td>-1.139 ± 0.008</td><td>-0.645 ± 0.006</td><td>1.757 ± 0.006</td><td>0.593</td></tr><tr><td>270</td><td>1028-52562-592</td><td>J213338.95+002605.2</td><td>1.334 ± 0.038</td><td>8.024 ± 0.025</td><td>8.074</td><td>-1.610 ± 0.018</td><td>-0.961 ± 0.009</td><td>2.409 ± 0.015</td><td>0.758</td></tr><tr><td>271</td><td>1028-52884-386</td><td>J212705.80+005827.1</td><td>1.291 ± 0.040</td><td>8.071 ± 0.028</td><td>8.125</td><td>-1.552 ± 0.020</td><td>-0.951 ± 0.010</td><td>2.368 ± 0.018</td><td>0.772</td></tr><tr><td>272</td><td>1028-52884-562</td><td>J213338.95+002605.2</td><td>1.328 ± 0.032</td><td>8.029 ± 0.022</td><td>8.084</td><td>-1.597 ± 0.015</td><td>-0.962 ± 0.008</td><td>2.409 ± 0.012</td><td>0.776</td></tr><tr><td>273</td><td>1030-52914-77</td><td>J214642.29+000009.0</td><td>1.076 ± 0.047</td><td>8.498 ± 0.057</td><td>8.227</td><td>-1.420 ± 0.010</td><td>-0.957 ± 0.009</td><td>2.248 ± 0.008</td><td>0.562</td></tr><tr><td>274</td><td>1030-52914-107</td><td>J214459.59+001140.2</td><td>1.003 ± 0.050</td><td>8.355 ± 0.051</td><td>8.441</td><td>-1.242 ± 0.009</td><td>-0.829 ± 0.006</td><td>1.946 ± 0.007</td><td>0.693</td></tr><tr><td>275</td><td>1032-53175-635</td><td>J220412.46+002201.5</td><td>1.328 ± 0.058</td><td>8.045 ± 0.045</td><td>8.058</td><td>-1.512 ± 0.019</td><td>-0.862 ± 0.011</td><td>2.356 ± 0.012</td><td>0.795</td></tr><tr><td>276</td><td>1033-52822-458</td><td>J220707.90+004658.8</td><td>1.306 ± 0.097</td><td>8.035 ± 0.064</td><td>8.102</td><td>-1.473 ± 0.031</td><td>-0.865 ± 0.015</td><td>2.269 ± 0.029</td><td>0.773</td></tr><tr><td>277</td><td>1034-52525-551</td><td>J221549.25+010938.8</td><td>1.197 ± 0.053</td><td>8.141 ± 0.040</td><td>8.110</td><td>-1.341 ± 0.014</td><td>-0.818 ± 0.008</td><td>2.092 ± 0.012</td><td>0.722</td></tr><tr><td>278</td><td>1034-52813-521</td><td>J221549.25+010938.8</td><td>1.091 ± 0.047</td><td>8.273 ± 0.041</td><td>8.095</td><td>-1.372 ± 0.011</td><td>-0.816 ± 0.006</td><td>2.123 ± 0.000</td><td>0.706</td></tr><tr><td>279</td><td>1035-52816-574</td><td>J222358.95+005007.8</td><td>1.217 ± 0.037</td><td>8.170 ± 0.032</td><td>8.301</td><td>-1.310 ± 0.046</td><td>-1.008 ± 0.012</td><td>2.202 ± 0.044</td><td>0.840</td></tr><tr><td>280</td><td>1040-52722-21</td><td>J132150.45+534127.9</td><td>1.221 ± 0.061</td><td>8.127 ± 0.047</td><td>8.083</td><td>-1.545 ± 0.016</td><td>-0.908 ± 0.011</td><td>2.335 ± 0.014</td><td>0.755</td></tr><tr><td>281</td><td>1040-52722-358</td><td>J130728.44+542652.4</td><td>1.123 ± 0.061</td><td>8.204 ± 0.045</td><td>8.166</td><td>-1.172 ± 0.007</td><td>-0.702 ± 0.006</td><td>1.702 ± 0.001</td><td>0.501</td></tr><tr><td>282</td><td>1042-52725-399</td><td>J133446.30+534927.4</td><td>1.172 ± 0.052</td><td>8.162 ± 0.046</td><td>8.768</td><td>-1.319 ± 0.017</td><td>-1.098 ± 0.030</td><td>2.146 ± 0.015</td><td>0.827</td></tr><tr><td>283</td><td>1043-52465-78</td><td>J135624.07+523851.0</td><td>1.203 ± 0.077</td><td>8.095 ± 0.058</td><td>8.613</td><td>-1.191 ± 0.013</td><td>-0.880 ± 0.014</td><td>1.896 ± 0.011</td><td>0.712</td></tr><tr><td>284</td><td>1052-52466-115</td><td>J153808.50+431421.1</td><td>1.164 ± 0.078</td><td>8.174 ± 0.057</td><td>8.530</td><td>-1.067 ± 0.009</td><td>-0.684 ± 0.007</td><td>1.708 ± 0.006</td><td>0.595</td></tr><tr><td>285</td><td>1054-52516-499</td><td>J155411.09+400602.8</td><td>1.098 ± 0.067</td><td>8.207 ± 0.061</td><td>8.058</td><td>-1.299 ± 0.012</td><td>-0.769 ± 0.009</td><td>2.001 ± 0.009</td><td>0.718</td></tr><tr><td>286</td><td>1060-52636-21</td><td>J075638.45+291819.8</td><td>1.342 ± 0.090</td><td>7.944 ± 0.048</td><td>8.690</td><td>-0.834 ± 0.007</td><td>-0.731 ± 0.014</td><td>1.386 ± 0.005</td><td>0.557</td></tr><tr><td>287</td><td>1060-52636-328</td><td>J075230.29+301607.6</td><td>1.247 ± 0.046</td><td>8.076 ± 0.035</td><td>8.037</td><td>-1.556 ± 0.031</td><td>-0.943 ± 0.013</td><td>2.341 ± 0.028</td><td>0.778</td></tr><tr><td>288</td><td>1063-52591-389</td><td>J033128.49+003737.5</td><td>1.599 ± 0.082</td><td>7.789 ± 0.039</td><td>8.086</td><td>-1.439 ± 0.025</td><td>-0.809 ± 0.013</td><td>2.172 ± 0.019</td><td>0.715</td></tr><tr><td>289</td><td>1064-52577-509</td><td>J032713.08+003112.3</td><td>1.184 ± 0.062</td><td>8.171 ± 0.050</td><td>8.212</td><td>-1.320 ± 0.016</td><td>-0.859 ± 0.011</td><td>2.124 ± 0.014</td><td>0.766</td></tr><tr><td>290</td><td>1067-52616-112</td><td>J030502.28+000453.7</td><td>1.169 ± 0.059</td><td>8.161 ± 0.051</td><td>8.041</td><td>-1.478 ± 0.016</td><td>-0.935 ± 0.011</td><td>2.268 ± 0.013</td><td>0.783</td></tr><tr><td>291</td><td>1069-52590-399</td><td>J024359.02+003322.6</td><td>1.304 ± 0.036</td><td>8.075 ± 0.028</td><td>8.108</td><td>-1.606 ± 0.020</td><td>-1.053 ± 0.012</td><td>2.483 ± 0.018</td><td>0.830</td></tr><tr><td>292</td><td>1073-52649-409</td><td>J021306.62+005612.4</td><td>1.427 ± 0.018</td><td>7.972 ± 0.021</td><td>8.654</td><td>-1.555 ± 0.007</td><td>-1.259 ± 0.007</td><td>2.501 ± 0.005</td><td>0.921</td></tr><tr><td>293</td><td>1073-52649-419</td><td>J021332.93+010825.8</td><td>1.419 ± 0.042</td><td>7.973 ± 0.030</td><td>8.045</td><td>-1.699 ± 0.023</td><td>-1.047 ± 0.013</td><td>2.602 ± 0.020</td><td>0.868</td></tr><tr><td>294</td><td>1074-52937-186</td><td>J020551.72+003229.0</td><td>1.021 ± 0.057</td><td>8.292 ± 0.054</td><td>8.602</td><td>-1.022 ± 0.006</td><td>-0.700 ± 0.006</td><td>1.627 ± 0.004</td><td>0.620</td></tr><tr><td>295</td><td>1074-52937-573</td><td>J020817.62+004358.4</td><td>1.145 ± 0.045</td><td>8.214 ± 0.040</td><td>8.182</td><td>-1.440 ± 0.014</td><td>-0.995 ± 0.011</td><td>2.252 ± 0.012</td><td>0.777</td></tr><tr><td>296</td><td>1081-52531-17</td><td>J011640.25+004712.8</td><td>1.257 ± 0.075</td><td>8.141 ± 0.050</td><td>8.264</td><td>-1.355 ± 0.018</td><td>-0.874 ± 0.014</td><td>2.140 ± 0.016</td><td>0.696</td></tr><tr><td>297</td><td>1083-52520-354</td><td>J005410.34+003812.4</td><td>1.259 ± 0.078</td><td>8.120 ± 0.059</td><td>8.143</td><td>-1.546 ± 0.036</td><td>-1.109 ± 0.026</td><td>2.443 ± 0.033</td><td>0.858</td></tr><tr><td>298</td><td>1084-52591-99</td><td>J005132.11-004608.0</td><td>1.343 ± 0.097</td><td>7.957 ± 0.062</td><td>7.923</td><td>-2.024 ± 0.070</td><td>-1.082 ± 0.019</td><td>2.792 ± 0.068</td><td>0.794</td></tr><tr><td>299</td><td>1093-52591-261</td><td>J233817.90+001157.4</td><td>1.212 ± 0.071</td><td>8.175 ± 0.054</td><td>8.268</td><td>-1.338 ± 0.013</td><td>-0.889 ± 0.009</td><td>2.154 ± 0.010</td><td>0.739</td></tr><tr><td>300</td><td>1094-52524-543</td><td>J233549.15+001314.8</td><td>1.426 ± 0.069</td><td>7.887 ± 0.043</td><td>7.882</td><td>-1.746 ± 0.061</td><td>-1.284 ± 0.054</td><td>2.558 ± 0.059</td><td>0.853</td></tr><tr><td>301</td><td>1095-52521-381</td><td>J232122.52+003455.2</td><td>1.217 ± 0.071</td><td>8.154 ± 0.057</td><td>8.122</td><td>-1.558 ± 0.029</td><td>-0.988 ± 0.018</td><td>2.408 ± 0.025</td><td>0.803</td></tr><tr><td>302</td><td>1095-52521-619</td><td>J232757.74+005819.2</td><td>1.279 ± 0.096</td><td>8.067 ± 0.067</td><td>8.075</td><td>-1.596 ± 0.034</td><td>-0.940 ± 0.017</td><td>2.394 ± 0.031</td><td>0.770</td></tr><tr><td>303</td><td>1096-52974-102</td><td>J231845.21-002610.3</td><td>1.124 ± 0.057</td><td>8.224 ± 0.046</td><td>8.147</td><td>-1.297 ± 0.009</td><td>-0.784 ± 0.012</td><td>2.035 ± 0.007</td><td>0.707</td></tr><tr><td>304</td><td>1096-52974-630</td><td>J232122.52+003455.2</td><td>1.173 ± 0.061</td><td>8.204 ± 0.052</td><td>8.103</td><td>-1.626 ± 0.024</td><td>-1.005 ± 0.013</td><td>2.483 ± 0.021</td><td>0.811</td></tr><tr><td>305</td><td>1101-52621-576</td><td>J224041.33+005703.6</td><td>1.257 ± 0.073</td><td>8.145 ± 0.052</td><td>8.334</td><td>-1.400 ± 0.027</td><td>-0.986 ± 0.021</td><td>2.265 ± 0.025</td><td>0.785</td></tr><tr><td>306</td><td>1104-52912-439</td><td>J221243.06+000648.6</td><td>1.141 ± 0.061</td><td>8.221 ± 0.053</td><td>8.505</td><td>-1.278 ± 0.035</td><td>-0.965 ± 0.024</td><td>2.102 ± 0.033</td><td>0.806</td></tr><tr><td>307</td><td>1104-52912-511</td><td>J221523.06+000246.6</td><td>1.304 ± 0.019</td><td>8.093 ± 0.020</td><td>8.711</td><td>-1.350 ± 0.007</td><td>-1.162 ± 0.010</td><td>2.280 ± 0.005</td><td>0.877</td></tr><tr><td>308</td><td>1116-52932-12</td><td>J205034.66+004619.9</td><td>1.486 ± 0.095</td><td>7.867 ± 0.045</td><td>8.000</td><td>-1.528 ± 0.032</td><td>-0.902 ± 0.021</td><td>2.213 ± 0.029</td><td>0.671</td></tr><tr><td>309</td><td>1116-52932-89</td><td>J204827.46+005958.5</td><td>1.615 ± 0.060</td><td>7.723 ± 0.030</td><td>7.896</td><td>-1.828 ± 0.028</td><td>-1.089 ± 0.013</td><td>2.574 ± 0.026</td><td>0.801</td></tr><tr><td>310</td><td>1156-52641-378</td><td>J033128.49+003737.5</td><td>1.392 ± 0.065</td><td>7.919 ± 0.037</td><td>7.991</td><td>-1.506 ± 0.019</td><td>-0.891 ± 0.011</td><td>2.220 ± 0.017</td><td>0.720</td></tr><tr><td>311</td><td>1156-52641-423</td><td>J033047.69+002920.4</td><td>1.166 ± 0.048</td><td>8.187 ± 0.038</td><td>8.176</td><td>-1.360 ± 0.012</td><td>-0.880 ± 0.009</td><td>2.125 ± 0.010</td><td>0.724</td></tr><tr><td>312</td><td>1158-52668-370</td><td>J135013.80+585313.5</td><td>1.175 ± 0.085</td><td>8.113 ± 0.064</td><td>8.217</td><td>-1.160 ± 0.011</td><td>-0.716 ± 0.010</td><td>1.774 ± 0.008</td><td>0.619</td></tr><tr><td>313</td><td>1160-52674-534</td><td>J141652.46+571215.8</td><td>1.103 ± 0.057</td><td>8.223 ± 0.048</td><td>8.157</td><td>-1.212 ± 0.012</td><td>-0.719 ± 0.011</td><td>1.902 ± 0.010</td><td>0.675</td></tr><tr><td>314</td><td>1163-52669-284</td><td>J144328.47+533919.0</td><td>1.221 ± 0.031</td><td>8.121 ± 0.024</td><td>8.577</td><td>-1.259 ± 0.008</td><td>-0.925 ± 0.007</td><td>2.049 ± 0.006</td><td>0.764</td></tr><tr><td>315</td><td>1168-52731-639</td><td>J155548.46+465715.8</td><td>1.243 ± 0.078</td><td>8.080 ± 0.055</td><td>8.135</td><td>-1.238 ± 0.013</td><td>-0.697 ± 0.009</td><td>1.913 ± 0.010</td><td>0.644</td></tr><tr><td>316</td><td>1170-52756-485</td><td>J160821.94+432738.5</td><td>1.041 ± 0.064</td><td>8.309 ± 0.063</td><td>8.579</td><td>-1.157 ± 0.009</td><td>-0.815 ± 0.011</td><td>1.882 ± 0.007</td><td>0.714</td></tr></tbody></table>
<table><caption>Table 1. continued.</caption><thead><tr><th>(1)<br>Num</th><th>(2)<br>Plate-MJD-FiberID</th><th>(3)<br>IAU designations</th><th>(4)<br>t<sub>3</sub> (10<sup>4</sup>K)</th><th>(5)<br>12+log(O/H)<sub>τ<sub>e</sub></sub></th><th>(6)<br>(O/H)<sub>Bay</sub></th><th>(7)<br>N2</th><th>(8)<br>S2</th><th>(9)<br>O3N2</th><th>(10)<br>P</th></tr></thead><tbody><tr><td>317</td><td>1176-52791-591</td><td>J165712.75+321141.2</td><td>1.208 ± 0.031</td><td>8.094 ± 0.025</td><td>8.097</td><td>-1.344 ± 0.008</td><td>-0.894 ± 0.007</td><td>2.085 ± 0.006</td><td>0.751</td></tr><tr><td>318</td><td>1177-52824-556</td><td>J214350.86-072003.8</td><td>1.388 ± 0.044</td><td>7.950 ± 0.028</td><td>8.551</td><td>-1.299 ± 0.013</td><td>-0.957 ± 0.011</td><td>2.097 ± 0.011</td><td>0.793</td></tr><tr><td>319</td><td>1177-52824-616</td><td>J214338.30-065034.8</td><td>1.155 ± 0.061</td><td>8.179 ± 0.048</td><td>8.221</td><td>-1.215 ± 0.009</td><td>-0.755 ± 0.009</td><td>1.912 ± 0.005</td><td>0.665</td></tr><tr><td>320</td><td>1184-52641-581</td><td>J082057.60+034503.6</td><td>1.049 ± 0.064</td><td>8.296 ± 0.058</td><td>8.584</td><td>-1.091 ± 0.007</td><td>-0.735 ± 0.006</td><td>1.740 ± 0.005</td><td>0.624</td></tr><tr><td>321</td><td>1192-52649-173</td><td>J090356.79+045613.5</td><td>1.238 ± 0.041</td><td>8.086 ± 0.031</td><td>8.411</td><td>-1.310 ± 0.022</td><td>-0.948 ± 0.011</td><td>2.093 ± 0.019</td><td>0.775</td></tr><tr><td>322</td><td>1195-52724-60</td><td>J092540.94+063116.6</td><td>1.198 ± 0.040</td><td>8.163 ± 0.031</td><td>8.112</td><td>-1.419 ± 0.011</td><td>-0.862 ± 0.008</td><td>2.204 ± 0.008</td><td>0.734</td></tr><tr><td>323</td><td>1199-52703-600</td><td>J090610.83+395335.1</td><td>1.170 ± 0.050</td><td>8.171 ± 0.035</td><td>8.278</td><td>-1.151 ± 0.009</td><td>-0.679 ± 0.006</td><td>1.805 ± 0.006</td><td>0.608</td></tr><tr><td>324</td><td>1203-52669-570</td><td>J074915.48+225342.3</td><td>0.983 ± 0.054</td><td>8.417 ± 0.056</td><td>8.539</td><td>-1.163 ± 0.008</td><td>-0.777 ± 0.007</td><td>1.850 ± 0.005</td><td>0.635</td></tr><tr><td>325</td><td>1205-52670-307</td><td>J075838.40+252558.4</td><td>1.018 ± 0.055</td><td>8.265 ± 0.052</td><td>8.797</td><td>-0.938 ± 0.006</td><td>-0.873 ± 0.007</td><td>1.526 ± 0.004</td><td>0.640</td></tr><tr><td>326</td><td>1207-52672-506</td><td>J082527.65+295739.2</td><td>1.001 ± 0.048</td><td>8.368 ± 0.046</td><td>8.346</td><td>-1.129 ± 0.007</td><td>-0.679 ± 0.006</td><td>1.761 ± 0.005</td><td>0.597</td></tr><tr><td>327</td><td>1212-52703-388</td><td>J090403.60+363914.0</td><td>1.137 ± 0.036</td><td>8.238 ± 0.030</td><td>8.124</td><td>-1.411 ± 0.011</td><td>-0.854 ± 0.008</td><td>2.178 ± 0.008</td><td>0.702</td></tr><tr><td>328</td><td>1212-52703-584</td><td>J091208.95+362226.4</td><td>1.281 ± 0.029</td><td>8.061 ± 0.022</td><td>8.641</td><td>-1.230 ± 0.009</td><td>-0.993 ± 0.011</td><td>2.033 ± 0.007</td><td>0.781</td></tr><tr><td>329</td><td>1213-52972-88</td><td>J091724.07+362618.9</td><td>0.974 ± 0.050</td><td>8.397 ± 0.053</td><td>8.552</td><td>-1.152 ± 0.008</td><td>-0.773 ± 0.007</td><td>1.824 ± 0.005</td><td>0.653</td></tr><tr><td>330</td><td>1213-52972-500</td><td>J091640.05+373159.5</td><td>1.277 ± 0.039</td><td>8.105 ± 0.028</td><td>8.136</td><td>-1.464 ± 0.015</td><td>-0.903 ± 0.010</td><td>2.289 ± 0.013</td><td>0.758</td></tr><tr><td>331</td><td>1214-52731-339</td><td>J092126.45+384619.2</td><td>0.996 ± 0.047</td><td>8.344 ± 0.050</td><td>8.653</td><td>-1.050 ± 0.007</td><td>-0.879 ± 0.008</td><td>1.753 ± 0.005</td><td>0.721</td></tr><tr><td>332</td><td>1215-52725-273</td><td>J093538.86+383754.4</td><td>1.187 ± 0.024</td><td>8.205 ± 0.025</td><td>8.786</td><td>-1.440 ± 0.011</td><td>-1.131 ± 0.013</td><td>2.345 ± 0.009</td><td>0.859</td></tr><tr><td>333</td><td>1215-52725-629</td><td>J094314.40+403842.7</td><td>1.078 ± 0.062</td><td>8.282 ± 0.051</td><td>8.581</td><td>-1.035 ± 0.008</td><td>-0.682 ± 0.007</td><td>1.657 ± 0.005</td><td>0.569</td></tr><tr><td>334</td><td>1217-52672-271</td><td>J095538.93+414320.7</td><td>1.040 ± 0.065</td><td>8.328 ± 0.064</td><td>8.111</td><td>-1.341 ± 0.013</td><td>-0.830 ± 0.009</td><td>2.083 ± 0.010</td><td>0.709</td></tr><tr><td>335</td><td>1223-52781-287</td><td>J112437.80+083112.7</td><td>1.237 ± 0.069</td><td>8.074 ± 0.047</td><td>8.573</td><td>-1.098 ± 0.009</td><td>-0.739 ± 0.007</td><td>1.773 ± 0.006</td><td>0.661</td></tr><tr><td>336</td><td>1224-52765-566</td><td>J114025.94+104653.7</td><td>1.191 ± 0.074</td><td>8.167 ± 0.056</td><td>8.290</td><td>-1.252 ± 0.014</td><td>-0.804 ± 0.013</td><td>2.012 ± 0.011</td><td>0.708</td></tr><tr><td>337</td><td>1233-52734-335</td><td>J123444.26+104308.7</td><td>1.219 ± 0.033</td><td>8.158 ± 0.026</td><td>8.119</td><td>-1.494 ± 0.011</td><td>-0.905 ± 0.007</td><td>2.296 ± 0.007</td><td>0.736</td></tr><tr><td>338</td><td>1237-52762-42</td><td>J101629.88+073404.8</td><td>1.173 ± 0.035</td><td>8.211 ± 0.029</td><td>8.722</td><td>-1.088 ± 0.008</td><td>-0.922 ± 0.012</td><td>1.920 ± 0.007</td><td>0.774</td></tr><tr><td>339</td><td>1240-52734-340</td><td>J103509.33+094516.9</td><td>1.070 ± 0.039</td><td>8.263 ± 0.039</td><td>8.596</td><td>-1.207 ± 0.009</td><td>-0.914 ± 0.009</td><td>1.962 ± 0.006</td><td>0.761</td></tr><tr><td>340</td><td>1268-52933-318</td><td>J083038.23+285852.6</td><td>1.089 ± 0.044</td><td>8.226 ± 0.041</td><td>8.884</td><td>-0.890 ± 0.006</td><td>-0.953 ± 0.009</td><td>1.624 ± 0.004</td><td>0.755</td></tr><tr><td>341</td><td>1269-52937-177</td><td>J084219.08+300703.7</td><td>1.046 ± 0.039</td><td>8.280 ± 0.038</td><td>8.623</td><td>-1.113 ± 0.006</td><td>-0.877 ± 0.008</td><td>1.816 ± 0.004</td><td>0.711</td></tr><tr><td>342</td><td>1274-52995-258</td><td>J092125.53+345858.4</td><td>1.134 ± 0.060</td><td>8.212 ± 0.048</td><td>8.417</td><td>-1.161 ± 0.010</td><td>-0.737 ± 0.011</td><td>1.870 ± 0.008</td><td>0.669</td></tr><tr><td>343</td><td>1279-52736-147</td><td>J125153.04+493216.7</td><td>1.158 ± 0.056</td><td>8.193 ± 0.048</td><td>8.128</td><td>-1.377 ± 0.012</td><td>-0.871 ± 0.009</td><td>2.148 ± 0.007</td><td>0.733</td></tr><tr><td>344</td><td>1283-52762-315</td><td>J132751.58+480805.2</td><td>1.080 ± 0.048</td><td>8.250 ± 0.045</td><td>8.572</td><td>-1.122 ± 0.009</td><td>-0.829 ± 0.008</td><td>1.850 ± 0.006</td><td>0.724</td></tr><tr><td>345</td><td>1286-52725-150</td><td>J141020.62+460501.6</td><td>1.210 ± 0.045</td><td>8.133 ± 0.032</td><td>8.507</td><td>-1.091 ± 0.008</td><td>-0.740 ± 0.007</td><td>1.816 ± 0.006</td><td>0.681</td></tr><tr><td>346</td><td>1286-52725-579</td><td>J141121.91+472849.4</td><td>1.124 ± 0.052</td><td>8.232 ± 0.042</td><td>8.331</td><td>-1.190 ± 0.010</td><td>-0.741 ± 0.008</td><td>1.905 ± 0.007</td><td>0.666</td></tr><tr><td>347</td><td>1301-52976-356</td><td>J090934.68+085837.5</td><td>1.041 ± 0.054</td><td>8.272 ± 0.043</td><td>8.671</td><td>-0.888 ± 0.004</td><td>-0.681 ± 0.005</td><td>1.416 ± 0.003</td><td>0.535</td></tr><tr><td>348</td><td>1303-53050-66</td><td>J093623.28+090001.0</td><td>1.166 ± 0.056</td><td>8.201 ± 0.049</td><td>8.701</td><td>-1.211 ± 0.015</td><td>-0.979 ± 0.017</td><td>2.066 ± 0.013</td><td>0.822</td></tr><tr><td>349</td><td>1304-52993-245</td><td>J093317.21+085425.9</td><td>1.153 ± 0.074</td><td>8.153 ± 0.052</td><td>8.607</td><td>-0.909 ± 0.007</td><td>-0.665 ± 0.006</td><td>1.484 ± 0.004</td><td>0.561</td></tr><tr><td>350</td><td>1306-52996-292</td><td>J094756.86+091132.2</td><td>1.403 ± 0.032</td><td>7.930 ± 0.023</td><td>7.987</td><td>-1.735 ± 0.018</td><td>-1.087 ± 0.010</td><td>2.549 ± 0.015</td><td>0.826</td></tr><tr><td>351</td><td>1310-53033-508</td><td>J113734.87+572406.1</td><td>1.107 ± 0.047</td><td>8.252 ± 0.040</td><td>8.132</td><td>-1.319 ± 0.013</td><td>-0.787 ± 0.008</td><td>2.065 ± 0.010</td><td>0.704</td></tr><tr><td>352</td><td>1316-52790-581</td><td>J123801.22+580114.5</td><td>1.367 ± 0.024</td><td>8.057 ± 0.022</td><td>8.367</td><td>-1.575 ± 0.012</td><td>-1.146 ± 0.014</td><td>2.530 ± 0.009</td><td>0.885</td></tr><tr><td>353</td><td>1324-53088-524</td><td>J140721.21+553807.8</td><td>1.001 ± 0.057</td><td>8.387 ± 0.058</td><td>8.590</td><td>-1.141 ± 0.009</td><td>-0.817 ± 0.016</td><td>1.861 ± 0.007</td><td>0.683</td></tr><tr><td>354</td><td>1325-52762-519</td><td>J141431.20+543056.1</td><td>1.260 ± 0.059</td><td>8.091 ± 0.043</td><td>8.256</td><td>-1.406 ± 0.027</td><td>-1.020 ± 0.026</td><td>2.234 ± 0.025</td><td>0.799</td></tr><tr><td>355</td><td>1326-52764-377</td><td>J142344.91+535924.8</td><td>1.308 ± 0.067</td><td>8.029 ± 0.045</td><td>8.092</td><td>-1.416 ± 0.019</td><td>-0.835 ± 0.012</td><td>2.192 ± 0.016</td><td>0.755</td></tr><tr><td>356</td><td>1331-52766-258</td><td>J152115.67+465840.8</td><td>1.290 ± 0.090</td><td>7.948 ± 0.054</td><td>8.696</td><td>-0.903 ± 0.010</td><td>-0.727 ± 0.011</td><td>1.447 ± 0.008</td><td>0.598</td></tr><tr><td>357</td><td>1331-52766-554</td><td>J152841.69+475445.7</td><td>1.247 ± 0.032</td><td>8.075 ± 0.028</td><td>8.362</td><td>-1.445 ± 0.012</td><td>-1.063 ± 0.011</td><td>2.262 ± 0.009</td><td>0.822</td></tr><tr><td>358</td><td>1332-52781-27</td><td>J154120.02+453619.0</td><td>1.016 ± 0.051</td><td>8.345 ± 0.053</td><td>8.846</td><td>-0.956 ± 0.009</td><td>-0.915 ± 0.011</td><td>1.713 ± 0.007</td><td>0.756</td></tr><tr><td>359</td><td>1332-52781-602</td><td>J153821.29+465103.6</td><td>1.492 ± 0.137</td><td>7.870 ± 0.066</td><td>8.242</td><td>-1.197 ± 0.019</td><td>-0.734 ± 0.018</td><td>1.867 ± 0.016</td><td>0.633</td></tr><tr><td>360</td><td>1333-52782-172</td><td>J154544.52+441551.8</td><td>1.281 ± 0.048</td><td>8.075 ± 0.033</td><td>8.107</td><td>-1.462 ± 0.014</td><td>-0.901 ± 0.010</td><td>2.239 ± 0.011</td><td>0.727</td></tr><tr><td>361</td><td>1335-52824-291</td><td>J155944.57+403325.2</td><td>1.195 ± 0.053</td><td>8.167 ± 0.045</td><td>8.310</td><td>-1.369 ± 0.021</td><td>-0.995 ± 0.020</td><td>2.221 ± 0.019</td><td>0.820</td></tr><tr><td>362</td><td>1338-52765-329</td><td>J162350.72+371003.7</td><td>1.106 ± 0.036</td><td>8.290 ± 0.034</td><td>8.509</td><td>-1.329 ± 0.010</td><td>-0.965 ± 0.011</td><td>2.152 ± 0.008</td><td>0.756</td></tr><tr><td>363</td><td>1345-52814-364</td><td>J134251.19+441343.3</td><td>1.068 ± 0.065</td><td>8.268 ± 0.064</td><td>8.171</td><td>-1.335 ± 0.014</td><td>-0.882 ± 0.011</td><td>2.100 ± 0.011</td><td>0.770</td></tr><tr><td>364</td><td>1349-52797-175</td><td>J143248.38+395917.8</td><td>1.224 ± 0.021</td><td>8.148 ± 0.019</td><td>8.434</td><td>-1.393 ± 0.009</td><td>-0.993 ± 0.008</td><td>2.245 ± 0.007</td><td>0.807</td></tr><tr><td>365</td><td>1349-52797-429</td><td>J143036.00+402413.6</td><td>1.193 ± 0.065</td><td>8.186 ± 0.051</td><td>8.187</td><td>-1.396 ± 0.018</td><td>-0.907 ± 0.013</td><td>2.206 ± 0.015</td><td>0.743</td></tr><tr><td>366</td><td>1355-52823-98</td><td>J153536.14+332843.3</td><td>0.984 ± 0.052</td><td>8.441 ± 0.059</td><td>8.531</td><td>-1.209 ± 0.008</td><td>-0.850 ± 0.008</td><td>1.978 ± 0.004</td><td>0.700</td></tr><tr><td>367</td><td>1356-53033-248</td><td>J100052.15+383056.8</td><td>1.016 ± 0.051</td><td>8.347 ± 0.052</td><td>8.573</td><td>-0.988 ± 0.007</td><td>-0.783 ± 0.009</td><td>1.699 ± 0.005</td><td>0.690</td></tr><tr><td>368</td><td>1357-53034-245</td><td>J101207.44+393132.1</td><td>1.080 ± 0.071</td><td>8.286 ± 0.062</td><td>8.489</td><td>-1.085 ± 0.035</td><td>-0.767 ± 0.010</td><td>1.820 ± 0.034</td><td>0.692</td></tr><tr><td>369</td><td>1357-53034-540</td><td>J101541.16+412050.2</td><td>1.037 ± 0.042</td><td>8.357 ± 0.044</td><td>8.585</td><td>-1.209 ± 0.009</td><td>-0.960 ± 0.009</td><td>2.015 ± 0.006</td><td>0.760</td></tr></tbody></table>
<table><caption>Table 1. continued.</caption><thead><tr><th>(1)</th><th>(2)</th><th>(3)</th><th>(4)</th><th>(5)</th><th>(6)</th><th>(7)</th><th>(8)</th><th>(9)</th><th>(10)</th></tr><tr><th>Num</th><th>Plate-MJD-FiberID</th><th>IAU designations</th><th>t<sub>2</sub> (10<sup>4</sup>K)</th><th>12+log(O/H)<sub>T<sub>e</sub></sub></th><th>(O/H)<sub>Bay</sub></th><th>N2</th><th>S2</th><th>O3N2</th><th>P</th></tr></thead><tbody><tr><td>370</td><td>1357-53034-579</td><td>J101803.24+410621.2</td><td>1.407 ± 0.036</td><td>7.979 ± 0.026</td><td>8.649</td><td>-1.440 ± 0.023</td><td>-1.186 ± 0.032</td><td>2.340 ± 0.021</td><td>0.872</td></tr><tr><td>371</td><td>1363-53053-411</td><td>J110251.98+433827.2</td><td>1.135 ± 0.045</td><td>8.206 ± 0.036</td><td>8.077</td><td>-1.390 ± 0.012</td><td>-0.817 ± 0.008</td><td>2.117 ± 0.009</td><td>0.696</td></tr><tr><td>372</td><td>1363-53053-599</td><td>J110744.09+443825.8</td><td>1.074 ± 0.058</td><td>8.286 ± 0.053</td><td>8.423</td><td>-1.221 ± 0.010</td><td>-0.805 ± 0.009</td><td>1.948 ± 0.006</td><td>0.688</td></tr><tr><td>373</td><td>1365-53062-381</td><td>J111727.26+450043.2</td><td>1.349 ± 0.031</td><td>8.072 ± 0.029</td><td>8.182</td><td>-1.518 ± 0.024</td><td>-1.322 ± 0.030</td><td>2.497 ± 0.022</td><td>0.919</td></tr><tr><td>374</td><td>1368-53084-334</td><td>J114424.02+443630.2</td><td>1.102 ± 0.055</td><td>8.198 ± 0.046</td><td>8.505</td><td>-1.167 ± 0.010</td><td>-0.773 ± 0.007</td><td>1.827 ± 0.007</td><td>0.673</td></tr><tr><td>375</td><td>1372-53062-517</td><td>J123915.79+444800.7</td><td>0.964 ± 0.045</td><td>8.368 ± 0.049</td><td>8.622</td><td>-0.969 ± 0.006</td><td>-0.776 ± 0.006</td><td>1.607 ± 0.004</td><td>0.666</td></tr><tr><td>376</td><td>1382-53115-231</td><td>J143532.88+364630.7</td><td>1.295 ± 0.087</td><td>8.010 ± 0.053</td><td>8.243</td><td>-1.183 ± 0.015</td><td>-0.755 ± 0.010</td><td>1.825 ± 0.013</td><td>0.629</td></tr><tr><td>377</td><td>1388-53119-39</td><td>J153656.45+312248.0</td><td>1.088 ± 0.052</td><td>8.260 ± 0.045</td><td>8.589</td><td>-1.110 ± 0.007</td><td>-0.829 ± 0.007</td><td>1.811 ± 0.004</td><td>0.666</td></tr><tr><td>378</td><td>1391-52817-231</td><td>J155338.85+280257.8</td><td>1.074 ± 0.068</td><td>8.222 ± 0.054</td><td>8.780</td><td>-0.708 ± 0.005</td><td>-0.696 ± 0.006</td><td>1.241 ± 0.003</td><td>0.547</td></tr><tr><td>379</td><td>1394-53108-259</td><td>J141240.42+424213.7</td><td>1.210 ± 0.090</td><td>8.156 ± 0.062</td><td>8.146</td><td>-1.290 ± 0.013</td><td>-0.695 ± 0.010</td><td>1.978 ± 0.013</td><td>0.613</td></tr><tr><td>380</td><td>1395-52825-242</td><td>J142405.74+421646.2</td><td>1.353 ± 0.018</td><td>8.059 ± 0.019</td><td>8.786</td><td>-1.330 ± 0.009</td><td>-1.180 ± 0.012</td><td>2.276 ± 0.007</td><td>0.889</td></tr><tr><td>381</td><td>1398-53146-573</td><td>J150321.55+401652.6</td><td>1.494 ± 0.138</td><td>7.863 ± 0.069</td><td>8.134</td><td>-1.280 ± 0.021</td><td>-0.731 ± 0.017</td><td>1.948 ± 0.017</td><td>0.636</td></tr><tr><td>382</td><td>1399-53172-204</td><td>J151242.96+372535.0</td><td>1.067 ± 0.068</td><td>8.321 ± 0.068</td><td>8.550</td><td>-1.248 ± 0.018</td><td>-0.956 ± 0.017</td><td>2.070 ± 0.015</td><td>0.776</td></tr><tr><td>383</td><td>1401-53144-397</td><td>J152821.98+362409.3</td><td>1.069 ± 0.042</td><td>8.323 ± 0.043</td><td>8.543</td><td>-1.290 ± 0.011</td><td>-0.968 ± 0.010</td><td>2.126 ± 0.008</td><td>0.791</td></tr><tr><td>384</td><td>1405-52826-395</td><td>J160135.95+311353.7</td><td>1.021 ± 0.061</td><td>8.335 ± 0.063</td><td>8.585</td><td>-1.135 ± 0.010</td><td>-0.842 ± 0.010</td><td>1.861 ± 0.007</td><td>0.715</td></tr><tr><td>385</td><td>1409-52824-461</td><td>J163305.62+260026.6</td><td>1.920 ± 0.219</td><td>7.595 ± 0.068</td><td>8.046</td><td>-1.539 ± 0.045</td><td>-0.805 ± 0.021</td><td>2.183 ± 0.041</td><td>0.617</td></tr><tr><td>386</td><td>1418-53142-442</td><td>J160055.10+344551.8</td><td>1.155 ± 0.055</td><td>8.138 ± 0.042</td><td>8.615</td><td>-1.051 ± 0.008</td><td>-0.794 ± 0.008</td><td>1.712 ± 0.006</td><td>0.672</td></tr><tr><td>387</td><td>1425-52913-518</td><td>J170450.35+204718.9</td><td>1.052 ± 0.053</td><td>8.359 ± 0.053</td><td>8.500</td><td>-1.247 ± 0.011</td><td>-0.886 ± 0.010</td><td>2.056 ± 0.009</td><td>0.738</td></tr><tr><td>388</td><td>1428-52998-568</td><td>J102847.64+394941.5</td><td>0.923 ± 0.047</td><td>8.515 ± 0.055</td><td>8.623</td><td>-1.071 ± 0.007</td><td>-0.759 ± 0.006</td><td>1.695 ± 0.004</td><td>0.558</td></tr><tr><td>389</td><td>1430-53002-389</td><td>J102909.31+394426.1</td><td>0.955 ± 0.046</td><td>8.401 ± 0.052</td><td>8.602</td><td>-1.108 ± 0.007</td><td>-0.815 ± 0.007</td><td>1.780 ± 0.005</td><td>0.684</td></tr><tr><td>390</td><td>1442-53050-396</td><td>J112546.80+470000.3</td><td>0.865 ± 0.044</td><td>8.557 ± 0.059</td><td>8.688</td><td>-0.963 ± 0.005</td><td>-0.846 ± 0.006</td><td>1.627 ± 0.003</td><td>0.665</td></tr><tr><td>391</td><td>1445-53062-429</td><td>J114138.04+423437.2</td><td>1.299 ± 0.060</td><td>8.024 ± 0.039</td><td>8.065</td><td>-1.365 ± 0.015</td><td>-0.837 ± 0.011</td><td>2.093 ± 0.013</td><td>0.709</td></tr><tr><td>392</td><td>1454-53090-204</td><td>J123506.50+413736.4</td><td>0.975 ± 0.058</td><td>8.358 ± 0.062</td><td>8.735</td><td>-0.902 ± 0.007</td><td>-0.800 ± 0.009</td><td>1.556 ± 0.005</td><td>0.679</td></tr><tr><td>393</td><td>1455-53089-287</td><td>J123803.77+461820.1</td><td>1.243 ± 0.026</td><td>8.153 ± 0.022</td><td>8.662</td><td>-1.262 ± 0.008</td><td>-0.979 ± 0.008</td><td>2.135 ± 0.005</td><td>0.800</td></tr><tr><td>394</td><td>1457-53116-381</td><td>J125251.63+480508.1</td><td>1.059 ± 0.068</td><td>8.340 ± 0.064</td><td>8.225</td><td>-1.307 ± 0.016</td><td>-0.825 ± 0.010</td><td>2.063 ± 0.013</td><td>0.680</td></tr><tr><td>395</td><td>1462-53112-184</td><td>J132032.04+405901.6</td><td>1.020 ± 0.064</td><td>8.326 ± 0.063</td><td>8.708</td><td>-1.041 ± 0.008</td><td>-0.897 ± 0.009</td><td>1.717 ± 0.006</td><td>0.671</td></tr><tr><td>396</td><td>1464-53091-232</td><td>J133037.68+401953.0</td><td>1.016 ± 0.041</td><td>8.356 ± 0.042</td><td>8.156</td><td>-1.304 ± 0.008</td><td>-0.821 ± 0.008</td><td>2.037 ± 0.006</td><td>0.706</td></tr><tr><td>397</td><td>1464-53091-442</td><td>J133346.30+415213.0</td><td>1.138 ± 0.064</td><td>8.226 ± 0.050</td><td>8.460</td><td>-1.131 ± 0.011</td><td>-0.727 ± 0.008</td><td>1.828 ± 0.008</td><td>0.633</td></tr><tr><td>398</td><td>1466-53083-92</td><td>J135403.26+442616.4</td><td>1.065 ± 0.063</td><td>8.296 ± 0.057</td><td>8.588</td><td>-1.090 ± 0.008</td><td>-0.797 ± 0.008</td><td>1.780 ± 0.005</td><td>0.645</td></tr><tr><td>399</td><td>1467-53115-32</td><td>J141022.27+441455.6</td><td>1.079 ± 0.066</td><td>8.244 ± 0.059</td><td>8.296</td><td>-1.183 ± 0.009</td><td>-0.752 ± 0.008</td><td>1.851 ± 0.007</td><td>0.660</td></tr><tr><td>400</td><td>1467-53115-579</td><td>J141007.10+450817.5</td><td>1.057 ± 0.047</td><td>8.274 ± 0.038</td><td>8.597</td><td>-0.975 ± 0.006</td><td>-0.674 ± 0.006</td><td>1.563 ± 0.003</td><td>0.570</td></tr><tr><td>401</td><td>1474-52933-51</td><td>J220200.67+011208.6</td><td>1.302 ± 0.060</td><td>8.041 ± 0.043</td><td>8.056</td><td>-1.621 ± 0.029</td><td>-0.955 ± 0.016</td><td>2.436 ± 0.027</td><td>0.795</td></tr><tr><td>402</td><td>1476-52964-530</td><td>J221549.25+010938.8</td><td>1.077 ± 0.052</td><td>8.264 ± 0.049</td><td>8.091</td><td>-1.347 ± 0.013</td><td>-0.803 ± 0.009</td><td>2.098 ± 0.011</td><td>0.742</td></tr><tr><td>403</td><td>1487-52964-510</td><td>J234249.56+002440.3</td><td>1.309 ± 0.049</td><td>8.011 ± 0.034</td><td>8.025</td><td>-1.519 ± 0.032</td><td>-0.939 ± 0.011</td><td>2.300 ± 0.030</td><td>0.783</td></tr><tr><td>404</td><td>1491-52996-350</td><td>J000938.35+002535.7</td><td>1.546 ± 0.147</td><td>7.801 ± 0.070</td><td>8.093</td><td>-1.416 ± 0.044</td><td>-0.835 ± 0.020</td><td>2.156 ± 0.041</td><td>0.755</td></tr><tr><td>405</td><td>1492-52932-10</td><td>J002425.03+010359.0</td><td>1.498 ± 0.046</td><td>7.895 ± 0.032</td><td>7.998</td><td>-1.808 ± 0.028</td><td>-1.180 ± 0.016</td><td>2.705 ± 0.021</td><td>0.884</td></tr><tr><td>406</td><td>1495-52944-627</td><td>J004829.64+003710.5</td><td>1.369 ± 0.049</td><td>7.983 ± 0.031</td><td>8.082</td><td>-1.514 ± 0.019</td><td>-0.892 ± 0.009</td><td>2.276 ± 0.014</td><td>0.724</td></tr><tr><td>407</td><td>1522-52932-40</td><td>J212657.96+003227.9</td><td>1.713 ± 0.152</td><td>7.744 ± 0.062</td><td>8.124</td><td>-1.562 ± 0.049</td><td>-0.902 ± 0.031</td><td>2.359 ± 0.047</td><td>0.760</td></tr><tr><td>408</td><td>1562-53052-557</td><td>J025754.79+002726.6</td><td>1.250 ± 0.043</td><td>8.179 ± 0.036</td><td>8.116</td><td>-1.581 ± 0.023</td><td>-1.066 ± 0.017</td><td>2.528 ± 0.021</td><td>0.855</td></tr><tr><td>409</td><td>1570-53149-146</td><td>J164202.38+210345.7</td><td>1.067 ± 0.045</td><td>8.219 ± 0.039</td><td>8.816</td><td>-0.801 ± 0.005</td><td>-0.798 ± 0.005</td><td>1.420 ± 0.002</td><td>0.654</td></tr><tr><td>410</td><td>1571-53174-155</td><td>J163527.94+222518.8</td><td>0.959 ± 0.053</td><td>8.413 ± 0.060</td><td>8.557</td><td>-1.200 ± 0.007</td><td>-0.821 ± 0.007</td><td>1.893 ± 0.005</td><td>0.690</td></tr><tr><td>411</td><td>1580-53145-418</td><td>J154613.87+330423.1</td><td>1.087 ± 0.048</td><td>8.241 ± 0.044</td><td>8.592</td><td>-1.090 ± 0.008</td><td>-0.841 ± 0.008</td><td>1.814 ± 0.005</td><td>0.718</td></tr><tr><td>412</td><td>1580-53145-419</td><td>J154659.02+325632.2</td><td>1.277 ± 0.034</td><td>8.110 ± 0.030</td><td>8.137</td><td>-1.543 ± 0.030</td><td>-1.196 ± 0.016</td><td>2.463 ± 0.028</td><td>0.879</td></tr><tr><td>413</td><td>1584-52943-372</td><td>J080824.94+230840.9</td><td>0.981 ± 0.048</td><td>8.413 ± 0.048</td><td>8.780</td><td>-0.846 ± 0.006</td><td>-0.826 ± 0.007</td><td>1.542 ± 0.004</td><td>0.654</td></tr><tr><td>414</td><td>1584-52943-486</td><td>J080911.47+224758.9</td><td>1.113 ± 0.069</td><td>8.238 ± 0.050</td><td>8.575</td><td>-0.973 ± 0.007</td><td>-0.635 ± 0.010</td><td>1.555 ± 0.005</td><td>0.527</td></tr><tr><td>415</td><td>1590-52974-628</td><td>J090405.90+313045.0</td><td>1.332 ± 0.082</td><td>7.921 ± 0.047</td><td>8.613</td><td>-1.022 ± 0.008</td><td>-0.725 ± 0.009</td><td>1.614 ± 0.005</td><td>0.635</td></tr><tr><td>416</td><td>1595-52999-532</td><td>J095115.96+364031.0</td><td>1.041 ± 0.061</td><td>8.267 ± 0.053</td><td>8.623</td><td>-0.914 ± 0.006</td><td>-0.676 ± 0.006</td><td>1.469 ± 0.004</td><td>0.561</td></tr><tr><td>417</td><td>1597-52999-50</td><td>J101828.39+095412.2</td><td>1.021 ± 0.063</td><td>8.270 ± 0.060</td><td>8.663</td><td>-0.994 ± 0.006</td><td>-0.768 ± 0.006</td><td>1.588 ± 0.004</td><td>0.636</td></tr><tr><td>418</td><td>1597-52999-168</td><td>J101546.87+101234.5</td><td>1.131 ± 0.076</td><td>8.230 ± 0.064</td><td>8.189</td><td>-1.304 ± 0.020</td><td>-0.806 ± 0.012</td><td>2.062 ± 0.017</td><td>0.711</td></tr><tr><td>419</td><td>1597-52999-251</td><td>J101139.17+101042.2</td><td>1.059 ± 0.053</td><td>8.325 ± 0.051</td><td>8.120</td><td>-1.366 ± 0.013</td><td>-0.811 ± 0.009</td><td>2.123 ± 0.010</td><td>0.703</td></tr><tr><td>420</td><td>1597-52999-358</td><td>J100950.23+110439.3</td><td>1.024 ± 0.042</td><td>8.301 ± 0.042</td><td>8.598</td><td>-1.153 ± 0.007</td><td>-0.830 ± 0.007</td><td>1.851 ± 0.005</td><td>0.717</td></tr><tr><td>421</td><td>1601-53115-168</td><td>J104829.23+111520.1</td><td>1.224 ± 0.027</td><td>8.161 ± 0.024</td><td>8.161</td><td>-1.421 ± 0.010</td><td>-0.909 ± 0.012</td><td>2.295 ± 0.008</td><td>0.815</td></tr><tr><td>422</td><td>1601-53115-526</td><td>J104819.42+123745.8</td><td>1.324 ± 0.103</td><td>7.944 ± 0.059</td><td>8.627</td><td>-1.048 ± 0.015</td><td>-0.717 ± 0.017</td><td>1.623 ± 0.012</td><td>0.598</td></tr><tr><td>423</td><td>1607-53083-205</td><td>J113530.91+111717.8</td><td>1.104 ± 0.040</td><td>8.245 ± 0.036</td><td>8.112</td><td>-1.327 ± 0.011</td><td>-0.819 ± 0.008</td><td>2.077 ± 0.009</td><td>0.721</td></tr></tbody></table>
<table><caption>Table 1. continued.</caption><thead><tr><th>(1)<br>Num</th><th>(2)<br>Plate-MJD-FiberID</th><th>(3)<br>IAU designations</th><th>(4)<br>t<sub>3</sub> (10<sup>4</sup>K)</th><th>(5)<br>12+log(O/H)<sub>τ<sub>e</sub></sub></th><th>(6)<br>(O/H)<sub>Bay</sub></th><th>(7)<br>N2</th><th>(8)<br>S2</th><th>(9)<br>O3N2</th><th>(10)<br>P</th></tr></thead><tbody><tr><td>424</td><td>1609-53142-238</td><td>J114837.49+121407.8</td><td>1.170 ± 0.045</td><td>8.142 ± 0.036</td><td>8.041</td><td>-1.360 ± 0.010</td><td>-0.861 ± 0.008</td><td>2.096 ± 0.008</td><td>0.738</td></tr><tr><td>425</td><td>1615-53166-206</td><td>J122900.39+112302.0</td><td>1.105 ± 0.069</td><td>8.247 ± 0.061</td><td>8.536</td><td>-1.148 ± 0.011</td><td>-0.789 ± 0.010</td><td>1.879 ± 0.008</td><td>0.693</td></tr><tr><td>426</td><td>1616-53169-205</td><td>J123534.25+111926.0</td><td>1.151 ± 0.039</td><td>8.247 ± 0.034</td><td>8.118</td><td>-1.410 ± 0.014</td><td>-0.875 ± 0.009</td><td>2.237 ± 0.011</td><td>0.745</td></tr><tr><td>427</td><td>1620-53137-470</td><td>J114228.75+075709.3</td><td>0.991 ± 0.059</td><td>8.403 ± 0.062</td><td>8.498</td><td>-1.232 ± 0.012</td><td>-0.844 ± 0.015</td><td>1.974 ± 0.009</td><td>0.706</td></tr><tr><td>428</td><td>1623-53089-493</td><td>J120344.83+072903.8</td><td>1.234 ± 0.089</td><td>8.071 ± 0.062</td><td>8.099</td><td>-1.268 ± 0.015</td><td>-0.694 ± 0.011</td><td>1.918 ± 0.012</td><td>0.638</td></tr><tr><td>429</td><td>1632-52996-135</td><td>J034254.29-005520.2</td><td>1.124 ± 0.045</td><td>8.229 ± 0.039</td><td>8.190</td><td>-1.341 ± 0.022</td><td>-0.910 ± 0.011</td><td>2.132 ± 0.021</td><td>0.762</td></tr><tr><td>430</td><td>1644-53144-564</td><td>J142805.52+362710.4</td><td>1.418 ± 0.022</td><td>7.941 ± 0.017</td><td>8.065</td><td>-1.502 ± 0.009</td><td>-1.029 ± 0.008</td><td>2.333 ± 0.006</td><td>0.816</td></tr><tr><td>431</td><td>1648-53171-21</td><td>J150950.07+314639.7</td><td>1.238 ± 0.076</td><td>8.084 ± 0.057</td><td>8.042</td><td>-1.439 ± 0.018</td><td>-0.868 ± 0.013</td><td>2.191 ± 0.015</td><td>0.739</td></tr><tr><td>432</td><td>1650-53174-305</td><td>J151634.77+300653.6</td><td>0.988 ± 0.044</td><td>8.387 ± 0.047</td><td>8.498</td><td>-1.098 ± 0.007</td><td>-0.832 ± 0.006</td><td>1.812 ± 0.004</td><td>0.694</td></tr><tr><td>433</td><td>1682-53173-3</td><td>J160810.37+352809.1</td><td>1.800 ± 0.039</td><td>7.745 ± 0.031</td><td>7.879</td><td>-2.528 ± 0.054</td><td>-1.833 ± 0.032</td><td>3.529 ± 0.047</td><td>0.980</td></tr><tr><td>434</td><td>1689-53177-521</td><td>J171108.98+234547.1</td><td>1.279 ± 0.049</td><td>8.075 ± 0.034</td><td>8.094</td><td>-1.515 ± 0.017</td><td>-0.897 ± 0.010</td><td>2.312 ± 0.015</td><td>0.756</td></tr><tr><td>435</td><td>1697-53142-48</td><td>J131644.79+105733.1</td><td>1.123 ± 0.033</td><td>8.259 ± 0.033</td><td>8.188</td><td>-1.425 ± 0.018</td><td>-0.959 ± 0.009</td><td>2.275 ± 0.016</td><td>0.805</td></tr><tr><td>436</td><td>1702-53144-62</td><td>J135832.26+104718.9</td><td>1.202 ± 0.025</td><td>8.222 ± 0.026</td><td>8.794</td><td>-1.466 ± 0.011</td><td>-1.199 ± 0.011</td><td>2.414 ± 0.008</td><td>0.867</td></tr><tr><td>437</td><td>1704-53178-345</td><td>J140158.15+134830.2</td><td>1.177 ± 0.069</td><td>8.163 ± 0.049</td><td>8.277</td><td>-1.180 ± 0.010</td><td>-0.716 ± 0.010</td><td>1.841 ± 0.007</td><td>0.613</td></tr><tr><td>438</td><td>1704-53178-478</td><td>J140555.23+140528.3</td><td>1.185 ± 0.077</td><td>8.149 ± 0.055</td><td>8.159</td><td>-1.248 ± 0.014</td><td>-0.741 ± 0.010</td><td>1.922 ± 0.012</td><td>0.634</td></tr><tr><td>439</td><td>1734-53034-490</td><td>J073149.49+404513.3</td><td>1.224 ± 0.031</td><td>8.145 ± 0.028</td><td>8.106</td><td>-1.549 ± 0.012</td><td>-1.013 ± 0.008</td><td>2.409 ± 0.009</td><td>0.820</td></tr><tr><td>440</td><td>1744-53055-450</td><td>J100307.77+130326.2</td><td>1.015 ± 0.061</td><td>8.339 ± 0.058</td><td>8.614</td><td>-0.991 ± 0.007</td><td>-0.742 ± 0.007</td><td>1.630 ± 0.004</td><td>0.618</td></tr><tr><td>441</td><td>1745-53061-463</td><td>J101157.09+130822.2</td><td>1.431 ± 0.018</td><td>8.000 ± 0.019</td><td>8.361</td><td>-1.644 ± 0.013</td><td>-1.349 ± 0.013</td><td>2.622 ± 0.011</td><td>0.918</td></tr><tr><td>442</td><td>1747-53075-182</td><td>J102744.14+130934.2</td><td>1.043 ± 0.054</td><td>8.307 ± 0.053</td><td>8.589</td><td>-1.039 ± 0.007</td><td>-0.817 ± 0.008</td><td>1.772 ± 0.005</td><td>0.720</td></tr><tr><td>443</td><td>1758-53084-338</td><td>J082520.11+082723.0</td><td>1.122 ± 0.042</td><td>8.265 ± 0.040</td><td>8.379</td><td>-1.423 ± 0.014</td><td>-1.016 ± 0.016</td><td>2.287 ± 0.011</td><td>0.818</td></tr><tr><td>444</td><td>1821-53167-496</td><td>J154453.28+062452.9</td><td>1.314 ± 0.089</td><td>7.985 ± 0.056</td><td>8.034</td><td>-1.337 ± 0.017</td><td>-0.770 ± 0.013</td><td>2.016 ± 0.015</td><td>0.681</td></tr><tr><td>445</td><td>282-51630-546</td><td>J113703.79+002817.4</td><td>1.156 ± 0.034</td><td>8.248 ± 0.031</td><td>8.186</td><td>-1.443 ± 0.018</td><td>-0.916 ± 0.010</td><td>2.333 ± 0.016</td><td>0.822</td></tr><tr><td>446</td><td>296-51665-411</td><td>J131937.25+005043.8</td><td>1.062 ± 0.037</td><td>8.346 ± 0.038</td><td>8.485</td><td>-1.364 ± 0.012</td><td>-0.995 ± 0.010</td><td>2.199 ± 0.008</td><td>0.770</td></tr><tr><td>447</td><td>297-51663-446</td><td>J132654.62+011346.5</td><td>1.209 ± 0.028</td><td>8.135 ± 0.025</td><td>8.103</td><td>-1.445 ± 0.012</td><td>-0.977 ± 0.012</td><td>2.286 ± 0.011</td><td>0.828</td></tr><tr><td>448</td><td>301-51641-525</td><td>J140018.94+010453.7</td><td>1.232 ± 0.025</td><td>8.124 ± 0.021</td><td>8.536</td><td>-1.303 ± 0.008</td><td>-0.955 ± 0.008</td><td>2.135 ± 0.006</td><td>0.799</td></tr><tr><td>449</td><td>304-51609-583</td><td>J142200.19+010213.2</td><td>1.011 ± 0.053</td><td>8.359 ± 0.052</td><td>8.553</td><td>-1.189 ± 0.008</td><td>-0.800 ± 0.011</td><td>1.893 ± 0.006</td><td>0.677</td></tr><tr><td>450</td><td>309-51666-282</td><td>J145146.99-005643.8</td><td>1.162 ± 0.026</td><td>8.188 ± 0.023</td><td>8.067</td><td>-1.545 ± 0.013</td><td>-0.976 ± 0.008</td><td>2.346 ± 0.011</td><td>0.773</td></tr><tr><td>451</td><td>348-51696-339</td><td>J163107.20+005324.7</td><td>1.168 ± 0.061</td><td>8.177 ± 0.047</td><td>8.088</td><td>-1.384 ± 0.011</td><td>-0.828 ± 0.008</td><td>2.116 ± 0.009</td><td>0.692</td></tr><tr><td>452</td><td>351-51695-217</td><td>J170201.44+604746.3</td><td>1.034 ± 0.041</td><td>8.293 ± 0.035</td><td>8.624</td><td>-0.961 ± 0.005</td><td>-0.747 ± 0.005</td><td>1.568 ± 0.003</td><td>0.602</td></tr><tr><td>453</td><td>394-51812-480</td><td>J005147.30+000939.9</td><td>1.566 ± 0.023</td><td>7.782 ± 0.018</td><td>7.866</td><td>-1.880 ± 0.024</td><td>-1.260 ± 0.010</td><td>2.709 ± 0.022</td><td>0.880</td></tr><tr><td>454</td><td>394-51876-472</td><td>J005147.30+000939.9</td><td>1.548 ± 0.018</td><td>7.797 ± 0.017</td><td>7.864</td><td>-1.873 ± 0.018</td><td>-1.289 ± 0.009</td><td>2.718 ± 0.016</td><td>0.898</td></tr><tr><td>455</td><td>406-51817-490</td><td>J022407.68+003226.1</td><td>1.085 ± 0.070</td><td>8.263 ± 0.059</td><td>8.125</td><td>-1.272 ± 0.011</td><td>-0.708 ± 0.007</td><td>1.919 ± 0.008</td><td>0.607</td></tr><tr><td>456</td><td>406-51900-204</td><td>J022312.62+004539.9</td><td>1.432 ± 0.125</td><td>7.906 ± 0.063</td><td>8.499</td><td>-1.015 ± 0.013</td><td>-0.630 ± 0.012</td><td>1.597 ± 0.010</td><td>0.550</td></tr><tr><td>457</td><td>406-51900-488</td><td>J022407.68+003226.1</td><td>1.183 ± 0.068</td><td>8.158 ± 0.048</td><td>8.130</td><td>-1.281 ± 0.011</td><td>-0.709 ± 0.008</td><td>1.920 ± 0.008</td><td>0.588</td></tr><tr><td>458</td><td>414-51869-459</td><td>J032724.17+004804.3</td><td>1.026 ± 0.051</td><td>8.310 ± 0.047</td><td>8.661</td><td>-1.086 ± 0.007</td><td>-0.841 ± 0.009</td><td>1.751 ± 0.005</td><td>0.667</td></tr><tr><td>459</td><td>414-51869-524</td><td>J032750.16+010135.0</td><td>1.040 ± 0.061</td><td>8.343 ± 0.054</td><td>8.445</td><td>-1.131 ± 0.008</td><td>-0.720 ± 0.007</td><td>1.788 ± 0.006</td><td>0.593</td></tr><tr><td>460</td><td>415-51879-284</td><td>J033031.22+005846.5</td><td>1.139 ± 0.039</td><td>8.250 ± 0.037</td><td>8.132</td><td>-1.518 ± 0.016</td><td>-0.991 ± 0.009</td><td>2.382 ± 0.014</td><td>0.807</td></tr><tr><td>461</td><td>419-51812-362</td><td>J004236.94+160202.7</td><td>1.059 ± 0.064</td><td>8.319 ± 0.063</td><td>8.821</td><td>-1.105 ± 0.012</td><td>-1.050 ± 0.028</td><td>1.931 ± 0.010</td><td>0.800</td></tr><tr><td>462</td><td>419-51868-362</td><td>J004236.94+160202.7</td><td>1.004 ± 0.059</td><td>8.393 ± 0.066</td><td>8.826</td><td>-1.063 ± 0.011</td><td>-1.107 ± 0.040</td><td>1.894 ± 0.010</td><td>0.809</td></tr><tr><td>463</td><td>425-51884-635</td><td>J013700.31+144157.1</td><td>1.028 ± 0.063</td><td>8.301 ± 0.063</td><td>8.052</td><td>-1.295 ± 0.009</td><td>-0.779 ± 0.006</td><td>2.001 ± 0.007</td><td>0.719</td></tr><tr><td>464</td><td>437-51876-460</td><td>J080147.11+435302.0</td><td>1.094 ± 0.034</td><td>8.271 ± 0.031</td><td>8.584</td><td>-1.236 ± 0.008</td><td>-0.912 ± 0.009</td><td>2.017 ± 0.006</td><td>0.746</td></tr><tr><td>465</td><td>483-51942-474</td><td>J090047.45+574255.0</td><td>0.985 ± 0.048</td><td>8.409 ± 0.053</td><td>8.767</td><td>-1.053 ± 0.006</td><td>-0.934 ± 0.009</td><td>1.830 ± 0.004</td><td>0.754</td></tr><tr><td>466</td><td>483-51942-586</td><td>J090139.89+575945.9</td><td>1.114 ± 0.045</td><td>8.235 ± 0.037</td><td>8.127</td><td>-1.317 ± 0.008</td><td>-0.813 ± 0.007</td><td>2.048 ± 0.006</td><td>0.697</td></tr><tr><td>467</td><td>594-52027-516</td><td>J154654.55+030902.0</td><td>1.109 ± 0.034</td><td>8.286 ± 0.032</td><td>8.532</td><td>-1.302 ± 0.012</td><td>-0.968 ± 0.011</td><td>2.149 ± 0.010</td><td>0.788</td></tr><tr><td>468</td><td>616-52442-336</td><td>J153534.13+545534.3</td><td>1.083 ± 0.054</td><td>8.314 ± 0.047</td><td>8.568</td><td>-1.125 ± 0.009</td><td>-0.832 ± 0.019</td><td>1.913 ± 0.007</td><td>0.726</td></tr><tr><td>469</td><td>662-52178-466</td><td>J013258.54+085337.6</td><td>1.003 ± 0.041</td><td>8.381 ± 0.042</td><td>8.349</td><td>-1.147 ± 0.007</td><td>-0.700 ± 0.007</td><td>1.844 ± 0.002</td><td>0.656</td></tr><tr><td>470</td><td>673-52162-73</td><td>J223126.30+000456.2</td><td>1.038 ± 0.065</td><td>8.328 ± 0.062</td><td>8.575</td><td>-1.100 ± 0.008</td><td>-0.776 ± 0.007</td><td>1.797 ± 0.005</td><td>0.657</td></tr><tr><td>471</td><td>675-52590-39</td><td>J225059.28+000032.7</td><td>1.763 ± 0.049</td><td>7.697 ± 0.032</td><td>7.909</td><td>-1.639 ± 0.014</td><td>-1.445 ± 0.034</td><td>2.543 ± 0.007</td><td>0.934</td></tr><tr><td>472</td><td>676-52178-192</td><td>J225059.28+000032.7</td><td>1.628 ± 0.033</td><td>7.758 ± 0.023</td><td>7.855</td><td>-1.687 ± 0.013</td><td>-1.398 ± 0.023</td><td>2.559 ± 0.011</td><td>0.916</td></tr><tr><td>473</td><td>677-52606-374</td><td>J225833.74+005630.4</td><td>1.247 ± 0.095</td><td>8.088 ± 0.070</td><td>8.319</td><td>-1.290 ± 0.023</td><td>-0.912 ± 0.023</td><td>2.093 ± 0.020</td><td>0.788</td></tr><tr><td>474</td><td>677-52606-533</td><td>J230210.00+004939.0</td><td>1.731 ± 0.029</td><td>7.655 ± 0.022</td><td>7.835</td><td>-2.212 ± 0.030</td><td>-1.456 ± 0.015</td><td>3.039 ± 0.027</td><td>0.910</td></tr><tr><td>475</td><td>678-52884-446</td><td>J230703.74+011311.2</td><td>1.002 ± 0.049</td><td>8.334 ± 0.047</td><td>8.819</td><td>-0.833 ± 0.005</td><td>-0.819 ± 0.006</td><td>1.467 ± 0.003</td><td>0.645</td></tr><tr><td>476</td><td>681-52199-201</td><td>J232936.56-011057.0</td><td>1.202 ± 0.027</td><td>8.176 ± 0.025</td><td>8.225</td><td>-1.394 ± 0.010</td><td>-0.937 ± 0.007</td><td>2.255 ± 0.008</td><td>0.813</td></tr><tr><td>477</td><td>681-52199-595</td><td>J233435.40+002714.4</td><td>1.315 ± 0.102</td><td>8.038 ± 0.061</td><td>8.189</td><td>-1.269 ± 0.039</td><td>-0.700 ± 0.014</td><td>1.927 ± 0.035</td><td>0.597</td></tr></tbody></table>
<table><caption>Table 1. continued.</caption><thead><tr><th>(1)<br>Num</th><th>(2)<br>Plate-MJD-FiberID</th><th>(3)<br>IAU designations</th><th>(4)<br>t<sub>3</sub> (10<sup>4</sup>K)</th><th>(5)<br>12+log(O/H)<sub>t<sub>c</sub></sub></th><th>(6)<br>(O/H)<sub>Bay</sub></th><th>(7)<br>N2</th><th>(8)<br>S2</th><th>(9)<br>O3N2</th><th>(10)<br>P</th></tr></thead><tbody><tr><td>478</td><td>682-52525-63</td><td>J234209.77-002451.1</td><td>1.282 ± 0.065</td><td>8.103 ± 0.047</td><td>8.122</td><td>-1.593 ± 0.027</td><td>-0.997 ± 0.035</td><td>2.448 ± 0.025</td><td>0.790</td></tr><tr><td>479</td><td>682-52525-172</td><td>J233751.94-001000.4</td><td>1.809 ± 0.033</td><td>7.738 ± 0.020</td><td>8.048</td><td>-1.804 ± 0.017</td><td>-1.331 ± 0.012</td><td>2.748 ± 0.014</td><td>0.899</td></tr><tr><td>480</td><td>683-52524-279</td><td>J234209.77-002451.1</td><td>1.140 ± 0.062</td><td>8.251 ± 0.056</td><td>8.139</td><td>-1.575 ± 0.028</td><td>-0.998 ± 0.043</td><td>2.443 ± 0.025</td><td>0.814</td></tr><tr><td>481</td><td>684-52523-494</td><td>J235242.19+002345.9</td><td>1.180 ± 0.081</td><td>8.146 ± 0.068</td><td>8.037</td><td>-1.512 ± 0.032</td><td>-0.976 ± 0.019</td><td>2.315 ± 0.029</td><td>0.806</td></tr><tr><td>482</td><td>684-52523-560</td><td>J235519.63+000051.8</td><td>1.183 ± 0.046</td><td>8.187 ± 0.038</td><td>8.145</td><td>-1.424 ± 0.015</td><td>-0.945 ± 0.011</td><td>2.226 ± 0.013</td><td>0.747</td></tr><tr><td>483</td><td>685-52203-296</td><td>J235519.63+000051.8</td><td>0.993 ± 0.057</td><td>8.387 ± 0.066</td><td>8.087</td><td>-1.433 ± 0.019</td><td>-0.943 ± 0.012</td><td>2.236 ± 0.017</td><td>0.800</td></tr><tr><td>484</td><td>686-52519-2</td><td>J001042.84-010200.9</td><td>1.244 ± 0.085</td><td>8.161 ± 0.066</td><td>8.469</td><td>-1.416 ± 0.028</td><td>-1.090 ± 0.024</td><td>2.339 ± 0.026</td><td>0.855</td></tr><tr><td>485</td><td>686-52519-185</td><td>J000703.98-003447.6</td><td>1.258 ± 0.032</td><td>8.117 ± 0.026</td><td>8.191</td><td>-1.427 ± 0.013</td><td>-0.961 ± 0.010</td><td>2.272 ± 0.011</td><td>0.791</td></tr><tr><td>486</td><td>686-52519-406</td><td>J000657.02+005125.9</td><td>1.195 ± 0.027</td><td>8.177 ± 0.025</td><td>8.530</td><td>-1.336 ± 0.008</td><td>-0.979 ± 0.008</td><td>2.181 ± 0.005</td><td>0.797</td></tr><tr><td>487</td><td>686-52519-476</td><td>J000635.54+002333.3</td><td>1.317 ± 0.087</td><td>8.037 ± 0.057</td><td>8.097</td><td>-1.537 ± 0.027</td><td>-0.881 ± 0.014</td><td>2.341 ± 0.024</td><td>0.768</td></tr><tr><td>488</td><td>691-52199-252</td><td>J004406.79-010838.4</td><td>1.280 ± 0.039</td><td>8.110 ± 0.029</td><td>8.147</td><td>-1.485 ± 0.016</td><td>-1.012 ± 0.011</td><td>2.353 ± 0.014</td><td>0.803</td></tr><tr><td>489</td><td>691-52199-307</td><td>J004020.02+000008.6</td><td>1.060 ± 0.056</td><td>8.221 ± 0.053</td><td>8.763</td><td>-0.942 ± 0.007</td><td>-0.816 ± 0.015</td><td>1.629 ± 0.006</td><td>0.750</td></tr><tr><td>490</td><td>691-52199-573</td><td>J004859.14+005553.0</td><td>1.420 ± 0.063</td><td>7.928 ± 0.035</td><td>8.039</td><td>-1.541 ± 0.029</td><td>-0.913 ± 0.015</td><td>2.312 ± 0.026</td><td>0.753</td></tr><tr><td>491</td><td>691-52199-636</td><td>J005147.30+000939.9</td><td>1.506 ± 0.025</td><td>7.833 ± 0.020</td><td>7.881</td><td>-1.858 ± 0.021</td><td>-1.256 ± 0.011</td><td>2.695 ± 0.019</td><td>0.878</td></tr><tr><td>492</td><td>692-52201-394</td><td>J005147.30+000939.9</td><td>1.617 ± 0.027</td><td>7.768 ± 0.020</td><td>7.888</td><td>-1.836 ± 0.024</td><td>-1.276 ± 0.012</td><td>2.683 ± 0.022</td><td>0.876</td></tr><tr><td>493</td><td>693-52254-403</td><td>J010101.27+011040.0</td><td>1.144 ± 0.066</td><td>8.225 ± 0.059</td><td>8.225</td><td>-1.327 ± 0.053</td><td>-0.929 ± 0.016</td><td>2.171 ± 0.050</td><td>0.807</td></tr><tr><td>494</td><td>693-52254-454</td><td>J010112.24+005449.3</td><td>1.178 ± 0.075</td><td>8.173 ± 0.058</td><td>8.094</td><td>-1.460 ± 0.020</td><td>-0.822 ± 0.016</td><td>2.206 ± 0.017</td><td>0.701</td></tr><tr><td>495</td><td>693-52254-463</td><td>J010000.24+001727.2</td><td>1.152 ± 0.043</td><td>8.259 ± 0.042</td><td>8.466</td><td>-1.480 ± 0.020</td><td>-1.150 ± 0.027</td><td>2.410 ± 0.017</td><td>0.867</td></tr><tr><td>496</td><td>693-52254-480</td><td>J005959.88+000014.0</td><td>1.483 ± 0.092</td><td>7.857 ± 0.046</td><td>8.041</td><td>-1.403 ± 0.020</td><td>-0.797 ± 0.015</td><td>2.108 ± 0.017</td><td>0.698</td></tr><tr><td>497</td><td>694-52209-73</td><td>J011210.87-000330.9</td><td>1.203 ± 0.059</td><td>8.154 ± 0.042</td><td>8.112</td><td>-1.391 ± 0.014</td><td>-0.837 ± 0.011</td><td>2.161 ± 0.012</td><td>0.720</td></tr><tr><td>498</td><td>694-52209-231</td><td>J010628.39+002000.9</td><td>1.368 ± 0.048</td><td>8.036 ± 0.031</td><td>8.144</td><td>-1.643 ± 0.035</td><td>-1.057 ± 0.020</td><td>2.531 ± 0.034</td><td>0.821</td></tr><tr><td>499</td><td>695-52202-261</td><td>J011210.87-000330.9</td><td>1.200 ± 0.057</td><td>8.168 ± 0.043</td><td>8.139</td><td>-1.391 ± 0.018</td><td>-0.841 ± 0.014</td><td>2.164 ± 0.016</td><td>0.709</td></tr><tr><td>500</td><td>698-52203-250</td><td>J013525.58-011348.3</td><td>1.092 ± 0.051</td><td>8.262 ± 0.047</td><td>8.552</td><td>-1.209 ± 0.029</td><td>-0.893 ± 0.013</td><td>1.982 ± 0.027</td><td>0.751</td></tr><tr><td>501</td><td>699-52202-337</td><td>J014246.61+010450.5</td><td>1.368 ± 0.052</td><td>7.963 ± 0.032</td><td>8.119</td><td>-1.353 ± 0.014</td><td>-0.847 ± 0.012</td><td>2.117 ± 0.011</td><td>0.757</td></tr><tr><td>502</td><td>701-52179-117</td><td>J020223.52+002728.0</td><td>1.519 ± 0.038</td><td>7.820 ± 0.026</td><td>7.887</td><td>-1.812 ± 0.025</td><td>-1.133 ± 0.015</td><td>2.638 ± 0.022</td><td>0.870</td></tr><tr><td>503</td><td>702-52178-335</td><td>J020411.35+004304.8</td><td>1.173 ± 0.050</td><td>8.171 ± 0.044</td><td>8.429</td><td>-1.372 ± 0.021</td><td>-0.954 ± 0.014</td><td>2.194 ± 0.018</td><td>0.804</td></tr><tr><td>504</td><td>703-52209-215</td><td>J021514.66-005254.4</td><td>1.091 ± 0.065</td><td>8.298 ± 0.060</td><td>8.160</td><td>-1.408 ± 0.018</td><td>-0.885 ± 0.015</td><td>2.227 ± 0.016</td><td>0.762</td></tr><tr><td>505</td><td>704-52205-42</td><td>J022635.74-011021.3</td><td>1.173 ± 0.068</td><td>8.186 ± 0.053</td><td>8.114</td><td>-1.392 ± 0.016</td><td>-0.801 ± 0.012</td><td>2.163 ± 0.014</td><td>0.722</td></tr><tr><td>506</td><td>704-52205-494</td><td>J022322.78+002336.9</td><td>1.310 ± 0.036</td><td>8.037 ± 0.026</td><td>8.047</td><td>-1.525 ± 0.016</td><td>-0.938 ± 0.009</td><td>2.351 ± 0.014</td><td>0.804</td></tr><tr><td>507</td><td>707-52177-11</td><td>J024939.72-011151.3</td><td>1.326 ± 0.039</td><td>8.035 ± 0.031</td><td>8.048</td><td>-1.626 ± 0.014</td><td>-1.087 ± 0.010</td><td>2.492 ± 0.012</td><td>0.842</td></tr><tr><td>508</td><td>707-52177-369</td><td>J024355.18+011148.8</td><td>1.093 ± 0.070</td><td>8.287 ± 0.066</td><td>8.562</td><td>-1.226 ± 0.016</td><td>-0.984 ± 0.022</td><td>2.059 ± 0.013</td><td>0.791</td></tr><tr><td>509</td><td>707-52177-525</td><td>J024702.71+011529.5</td><td>1.285 ± 0.022</td><td>8.099 ± 0.021</td><td>8.650</td><td>-1.430 ± 0.010</td><td>-1.132 ± 0.011</td><td>2.337 ± 0.008</td><td>0.863</td></tr><tr><td>510</td><td>708-52175-147</td><td>J025540.01-002240.0</td><td>1.187 ± 0.081</td><td>8.189 ± 0.061</td><td>8.163</td><td>-1.434 ± 0.035</td><td>-0.871 ± 0.017</td><td>2.216 ± 0.034</td><td>0.713</td></tr><tr><td>511</td><td>708-52175-155</td><td>J025436.22+000339.9</td><td>1.443 ± 0.040</td><td>7.890 ± 0.024</td><td>7.983</td><td>-1.691 ± 0.016</td><td>-1.059 ± 0.009</td><td>2.483 ± 0.015</td><td>0.805</td></tr><tr><td>512</td><td>708-52175-172</td><td>J025324.24+000716.6</td><td>1.276 ± 0.063</td><td>8.100 ± 0.044</td><td>8.211</td><td>-1.424 ± 0.033</td><td>-0.901 ± 0.013</td><td>2.245 ± 0.031</td><td>0.763</td></tr><tr><td>513</td><td>708-52175-299</td><td>J025020.86+005828.9</td><td>1.338 ± 0.087</td><td>7.962 ± 0.048</td><td>8.493</td><td>-1.052 ± 0.009</td><td>-0.664 ± 0.009</td><td>1.658 ± 0.007</td><td>0.599</td></tr><tr><td>514</td><td>708-52175-579</td><td>J025536.26+005609.6</td><td>1.235 ± 0.071</td><td>8.069 ± 0.047</td><td>8.106</td><td>-1.249 ± 0.010</td><td>-0.729 ± 0.008</td><td>1.924 ± 0.008</td><td>0.671</td></tr><tr><td>515</td><td>710-52203-611</td><td>J031314.21+004726.5</td><td>1.506 ± 0.126</td><td>7.903 ± 0.059</td><td>8.163</td><td>-1.270 ± 0.063</td><td>-0.751 ± 0.022</td><td>1.962 ± 0.059</td><td>0.621</td></tr><tr><td>516</td><td>712-52179-108</td><td>J032708.26+002551.9</td><td>1.212 ± 0.071</td><td>8.212 ± 0.055</td><td>8.186</td><td>-1.421 ± 0.020</td><td>-0.878 ± 0.052</td><td>2.292 ± 0.017</td><td>0.762</td></tr><tr><td>517</td><td>712-52199-115</td><td>J032708.26+002551.9</td><td>1.209 ± 0.057</td><td>8.205 ± 0.046</td><td>8.235</td><td>-1.392 ± 0.018</td><td>-0.833 ± 0.051</td><td>2.267 ± 0.016</td><td>0.779</td></tr><tr><td>518</td><td>713-52178-213</td><td>J033211.81+004416.0</td><td>1.785 ± 0.195</td><td>7.588 ± 0.064</td><td>8.686</td><td>-0.844 ± 0.008</td><td>-0.645 ± 0.011</td><td>1.275 ± 0.004</td><td>0.480</td></tr><tr><td>519</td><td>713-52178-496</td><td>J033319.20+001731.2</td><td>1.248 ± 0.036</td><td>8.136 ± 0.028</td><td>8.403</td><td>-1.264 ± 0.026</td><td>-0.942 ± 0.011</td><td>2.118 ± 0.024</td><td>0.790</td></tr><tr><td>520</td><td>714-52201-91</td><td>J034254.29+005520.2</td><td>1.046 ± 0.060</td><td>8.332 ± 0.060</td><td>8.169</td><td>-1.378 ± 0.031</td><td>-0.903 ± 0.014</td><td>2.179 ± 0.030</td><td>0.770</td></tr><tr><td>521</td><td>802-52289-423</td><td>J030135.57+011420.0</td><td>1.340 ± 0.037</td><td>8.059 ± 0.034</td><td>7.907</td><td>-1.884 ± 0.054</td><td>-1.481 ± 0.031</td><td>2.857 ± 0.051</td><td>0.940</td></tr><tr><td>522</td><td>804-52286-85</td><td>J031918.24+005859.1</td><td>1.093 ± 0.067</td><td>8.298 ± 0.062</td><td>8.186</td><td>-1.446 ± 0.020</td><td>-0.969 ± 0.012</td><td>2.276 ± 0.018</td><td>0.773</td></tr><tr><td>523</td><td>805-52586-144</td><td>J032708.26+002551.9</td><td>1.243 ± 0.038</td><td>8.174 ± 0.030</td><td>8.147</td><td>-1.364 ± 0.013</td><td>-0.839 ± 0.049</td><td>2.257 ± 0.011</td><td>0.797</td></tr><tr><td>524</td><td>805-52586-482</td><td>J032713.08+003112.3</td><td>1.108 ± 0.041</td><td>8.249 ± 0.037</td><td>8.201</td><td>-1.314 ± 0.012</td><td>-0.856 ± 0.007</td><td>2.115 ± 0.010</td><td>0.776</td></tr><tr><td>525</td><td>805-52586-550</td><td>J032750.16+010135.0</td><td>1.006 ± 0.045</td><td>8.355 ± 0.041</td><td>8.471</td><td>-1.106 ± 0.006</td><td>-0.695 ± 0.005</td><td>1.747 ± 0.004</td><td>0.614</td></tr><tr><td>526</td><td>805-52586-605</td><td>J033128.46+003737.2</td><td>1.289 ± 0.087</td><td>8.036 ± 0.058</td><td>8.056</td><td>-1.473 ± 0.020</td><td>-0.832 ± 0.011</td><td>2.181 ± 0.016</td><td>0.682</td></tr><tr><td>527</td><td>806-52592-587</td><td>J033653.64+005657.4</td><td>1.285 ± 0.077</td><td>8.055 ± 0.047</td><td>8.100</td><td>-1.456 ± 0.022</td><td>-0.823 ± 0.018</td><td>2.151 ± 0.019</td><td>0.649</td></tr><tr><td>528</td><td>811-52669-415</td><td>J030903.89+003846.6</td><td>1.512 ± 0.049</td><td>7.932 ± 0.034</td><td>8.071</td><td>-1.844 ± 0.037</td><td>-1.267 ± 0.022</td><td>2.801 ± 0.034</td><td>0.903</td></tr><tr><td>529</td><td>960-52466-61</td><td>J134225.32+582432.7</td><td>1.158 ± 0.034</td><td>8.194 ± 0.032</td><td>8.486</td><td>-1.393 ± 0.010</td><td>-0.999 ± 0.011</td><td>2.232 ± 0.008</td><td>0.823</td></tr><tr><td>530</td><td>972-52428-368</td><td>J165844.50+351923.1</td><td>1.125 ± 0.036</td><td>8.216 ± 0.031</td><td>8.317</td><td>-1.215 ± 0.008</td><td>-0.792 ± 0.007</td><td>1.957 ± 0.006</td><td>0.715</td></tr><tr><td>531</td><td>978-52431-415</td><td>J171400.93+313023.4</td><td>1.024 ± 0.048</td><td>8.335 ± 0.046</td><td>8.608</td><td>-1.035 ± 0.008</td><td>-0.842 ± 0.014</td><td>1.749 ± 0.006</td><td>0.696</td></tr></tbody></table>