DOI: 10.7910/dvn/k88gfi
title: DECaPS Stellar Inference

description: &lt;body&gt;

 &lt;h1 style="text-align: center; font-size: 24px;"&gt;DECaPS Stellar Inference&lt;/h1&gt;

 &lt;p&gt;Constraints on the distances, extinctions, and stellar types for 709 million stars used in the construction of the DECaPS 3D dust map from &lt;strong&gt;&lt;a href="https://ui.adsabs.harvard.edu/abs/2025arXiv250302657Z/abstract" target="_blank"&gt;
 Zucker, Saydjari, and Speagle et al. 2025&lt;/a&gt;&lt;/strong&gt;. For those not needing the full stellar sample, this catalog is also available to query via NOIRLab’s AstroDataLab 
and accessible via TAP-accessible clients, including the &lt;a href="https://astroquery.readthedocs.io/en/latest/" target="_blank"&gt;astroquery&lt;/a&gt;
Python package (see &lt;strong&gt;&lt;a href="https://datalab.noirlab.edu/data-explorer?showTable=decaps_dr2.stellar_inference" target="_blank"&gt; decaps dr2.stellar inference&lt;/a&gt;&lt;/strong&gt;).

 &lt;h3 style="font-size: 18px; font-weight: bold; margin-top: 20px;"&gt;Identifiers&lt;/h3&gt;
 &lt;ul&gt;
 &lt;li&gt;&lt;b&gt;decaps_id:&lt;/b&gt; Unique DECaPS2 object ID from &lt;a href="https://ui.adsabs.harvard.edu/abs/2023ApJS..264...28S/abstract" target="_blank"&gt;Saydjari et al. 2023&lt;/a&gt;&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;gaia_id:&lt;/b&gt; Gaia DR3 ID&lt;/li&gt;
 &lt;/ul&gt;

 &lt;h3 style="font-size: 18px; font-weight: bold; margin-top: 20px;"&gt;Astrometric Data&lt;/h3&gt;
 &lt;ul&gt;
 &lt;li&gt;&lt;b&gt;parallax:&lt;/b&gt; Gaia DR3 parallax in mas&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;parallax_error:&lt;/b&gt; Gaia DR3 parallax error in mas&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;ra:&lt;/b&gt; Right Ascension from DECaPS2 in deg&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;dec:&lt;/b&gt; Declination from DECaPS2 in deg&lt;/li&gt;
 &lt;/ul&gt;

 &lt;h3 style="font-size: 18px; font-weight: bold; margin-top: 20px;"&gt;Photometric Data&lt;/h3&gt;
 &lt;ul&gt;
 &lt;li&gt;&lt;b&gt;decaps_fracflux (x5):&lt;/b&gt; Fraction of flux in this object's PSF that comes from this object in each DECaPS band&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;mag (x13):&lt;/b&gt; Magnitudes from DECaPS2 (grizY), VVV (JHK), 2MASS (JHK), and unWISE (W1, W2) in mag&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;magerr (x13):&lt;/b&gt; Magnitude errors from DECaPS2, VVV, 2MASS, and unWISE in mag&lt;/li&gt;
 &lt;/ul&gt;

 &lt;h3 style="font-size: 18px; font-weight: bold; margin-top: 20px;"&gt;Samples and χ² &lt;/h3&gt;
 &lt;ul&gt;
 &lt;li&gt;&lt;b&gt;chi2:&lt;/b&gt; Best-fit χ² value from models used in the fit&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;samps_dist (x5):&lt;/b&gt; Five random samples of distance in kpc&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;samps_extinction (x5):&lt;/b&gt; Five random samples of A&lt;sub&gt;V&lt;/sub&gt; in mag&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;samps_rv (x5):&lt;/b&gt; Five random samples of R&lt;sub&gt;V&lt;/sub&gt;&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;samps_models (x5):&lt;/b&gt; Five random samples of the model index for accessing the input parameter grid (&lt;a href="https://zenodo.org/records/16813633" target="_blank"&gt;grid_mist_v10.h5&lt;/a&gt;)&lt;/li&gt;
 &lt;/ul&gt;

 &lt;h3 style="font-size: 18px; font-weight: bold; margin-top: 20px;"&gt;Percentile Data&lt;/h3&gt;
 &lt;ul&gt;
 &lt;li&gt;&lt;b&gt;dist (x5):&lt;/b&gt; 2.5th, 16th, 50th, 84th, 97.5th percentiles of the samples distance in kpc&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;rv (x5):&lt;/b&gt; 2.5th, 16th, 50th, 84th, 97.5th percentiles of the samples in R&lt;sub&gt;V&lt;/sub&gt;&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;eep (x5):&lt;/b&gt; 2.5th, 16th, 50th, 84th, 97.5th percentiles of the samples in MIST EEP&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;feh (x5):&lt;/b&gt; 2.5th, 16th, 50th, 84th, 97.5th percentiles of the samples FeH&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;loga (x5):&lt;/b&gt; 2.5th, 16th, 50th, 84th, 97.5th percentiles of the samples log age in years&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;logg (x5):&lt;/b&gt; 2.5th, 16th, 50th, 84th, 97.5th percentiles of the samples in surface gravity&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;logl (x5):&lt;/b&gt; 2.5th, 16th, 50th, 84th, 97.5th percentiles of the samples in log L&lt;sub&gt;bol&lt;/sub&gt; in L&lt;sub&gt;⊙&lt;/sub&gt;&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;logt (x5):&lt;/b&gt; 2.5th, 16th, 50th, 84th, 97.5th percentiles of the samples in log T&lt;sub&gt;eff&lt;/sub&gt; in K&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;mini (x5):&lt;/b&gt; 2.5th, 16th, 50th, 84th, 97.5th percentiles of the samples in initial mass in M&lt;sub&gt;⊙&lt;/sub&gt;&lt;/li&gt;
 &lt;li&gt;&lt;b&gt;extinction (x5):&lt;/b&gt; 2.5th, 16th, 50th, 84th, 97.5th percentiles of the samples in A&lt;sub&gt;V&lt;/sub&gt; in mag&lt;/li&gt;
 &lt;/ul&gt;

&lt;/body&gt;