cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57780/esa-y7fsk2g
title: 16900

description: We propose to observe with XMM-Newton (120 ks) and HST (2 orbits) the luminous quasar HE 0238-1904 (z=0.63) comma  which is host to one of the best studied UV outflows to date. The inferred mass outflow rate and kinetic luminosity are typical of AGN where intense feedback is at work. HE 0238-1904 was detected in the XMM-Newton Slew Survey comma  but no X-ray spectrum of this exceptional object has ever been acquired with any major X-ray observatory. Our aim is to obtain for the first time high-quality X-ray data of HE 0238-1904 comma  in order to understand the physical properties of its innermost regions comma  in terms of obscuration comma  intrinsic spectral shape comma  and possible presence of an X-ray counterpart to the UV wind. This observation will allow us to shed new light on the link between efficient accretion comma  powerful winds comma  and AGN feedback.
DOI: 10.15156/bio/sh1284315.09fu
title: SH1284315.09FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.57780/esa-y8jb9id
title: 16783

description: Cepheids play an important part in the Hubble Constant tension comma  and in evolutionary calculation benchmarks comma  which include comparisons with LMC Cepheids. In some cases comma  they lead to exotic end-stage objects. An important HST UV legacy is the measurement of the Cepheid masses comma  the fundamental parameter in stellar evolution.  The  HST high resolution E140H spectra requested in this proposal (a unique capability of HST) will measure the orbital velocity amplitude of hot companions of three Cepheids comma  V1334 Cyg comma  S Mus comma  and SU Cyg. This can be combined with recent infrared interferometry with the Very Large Telescope Interferometer (VLTI) and CHARA which has resolved the systems comma  providing visual orbits to augment the spectroscopic orbits. From this combination both masses and distances for the Cepheids have been derived comma  which already challenge current evolutionary tracks comma  even those incorporating rotation and core convective overshoot on the main sequence.  The observations  detailed in this proposal will improve the orbital solution through more accurate orbital velocity amplitudes of the hot companions.  In addition for SU Cyg the phasing of the short period orbit of the companion will be more precise. The requested observations are predicted to yield mass solutions accurate to a few percent.  These will be the most accurate Cepheid mass determinations available to quantitatively test the underlying physics at this stage.
DOI: 10.15156/bio/sh1284316.09fu
title: SH1284316.09FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.57780/esa-yamgxvj
title: 16677

description: The first glimpse of the spectral properties of zvirgul7-10 galaxies has emerged in the last several years. Deep UV spectra have revealed intense emission from nebular CIIICORCHETE_CLOSE and CIV comma  implying a hard radiation field that is rarely seen at lower redshifts. Unfortunately comma  we are currently completely unprepared to interpret these features comma  owing largely to shortcomings in our understanding of the low metallicity stellar populations thought to power this line emission. Fortunately comma  HST-COS has uncovered a sample of nearby metal poor galaxies with UV nebular line spectra approaching those seen at z>6. The discovery of these galaxies opens the door for a comprehensive investigation of the low metallicity stellar populations that likely dominate at z>6. Here we propose to obtain ultra-deep (6 orbit) COS-G160M spectra capable of measuring stellar photospheric and wind absorption features in a sample of 9 metal poor galaxies with intense CIV and CIIICORCHETE_CLOSE emission. The data will provide quantitative constraints on the metallicity of the massive stars required to power the hard radiation fields comma  establishing the best empirical baseline for interpreting reionization-era spectra. The proposed sample size is chosen to reveal how the ionizing spectrum varies with stellar metallicity and age in the parameter range expected at z>6. For each galaxy comma  we will simultaneously fit the stellar absorption features and nebular lines comma  providing a powerful stress test of low-metallicity models for massive stars. If this UV spectral database is not obtained while COS is still functioning comma  the interpretation of reionization era galaxy spectra will be severely jeopardized throughout the JWST era.
DOI: 10.15156/bio/sh1284317.09fu
title: SH1284317.09FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.57780/esa-ybnwscj
title: 16663

description: Uranus and Neptune comma  similar in size to the most abundant class of exoplanets comma  have been undergoing temporal changes comma  the causes of which we propose to investigate by measuring the informative spectral features of methane comma  which has special diagnostic significance on these ice giants because it can condense in their cold atmospheres. Condensation makes methane.s local abundance a function of vertical and horizontal atmospheric motions and thus serves as an important constraint on models of such motions. Prior HST-STIS observations of Uranus in 2002 comma  2012 comma  and 2015 have revealed that both polar regions have been depleted in methane.  But a subsequent and continued dramatic brightening of its north polar region raises questions about the relative roles of aerosols and methane in producing this change comma  an issue which new STIS observations can resolve. STIS observations of Neptune in 2003 suggest a methane depletion similar to that of Uranus comma  but one sample does little to constrain whatever seasonal changes may be present.  We thus propose 8 STIS orbits to obtain spatially resolved 524-1027 nm image cubes of both planets. These capture an important spectral region near 825 nm where methane and hydrogen absorptions are competitive and thus constrain the mixing ratio of methane relative to that of the dominant gas (hydrogen). They also capture a wide range of methane band strengths to help constrain the vertical distribution and scattering properties of aerosols comma  especially aided by the additional constraint of center-to-limb variations.  HST provides a combination of wavelength coverage comma  spatial resolution comma  and stability not  available from any other facility.
DOI: 10.57780/esa-ydzzxsm
title: 16564

description: Anneal procedures comma  i.e. warming up the CCD.s in a controlled fashion comma  are performed at a regular cadence to repair hot pixel as well as to acquire internal exposures to assess the effectiveness of each anneal and allow production of superbias and superdark reference files for the calibration pipeline.
DOI: 10.15156/bio/sh1284318.09fu
title: SH1284318.09FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.57780/esa-ygwy61x
title: 16194

description: Exoplanets on highly eccentric orbits offer unique insights into how planetary atmospheres respond to extreme variations in stellar forcing. By tracking the reradiation of heat during the planet.s closest approach to its host star (periapse passage) comma  we can test how a planet.s atmosphere responds to extreme radiative forcing comma  and directly measure the radiative timescales that remain ambiguous for planets on circular orbits. We propose to observe with HST-WFC3 a partial-orbit spectroscopic phase curve of the highly-eccentric transiting exoplanet comma  HAT-P-2b. The planet.s dayside temperature changes from being a typical Hot-Jupiter (1300virgulK) at apoapse comma  with no thermal inversion expected comma  to that of an Ultra-Hot-Jupiter (2400virgulK) at periapse comma  at which temperature thermal inversions are expected. Therefore comma  this target offers an opportunity to explore the transition between Hot- and Ultra-Hot-Jupiters.  This WFC3 phase curve observation comma  will start before transit comma  continue through periapse passage comma  and end after secondary eclipse. The wavelength range offered by WFC3 will probe deep atmospheric pressure levels comma  where dynamical processes become relevant in shaping the observed spatial and temporal flux variations. The spectroscopic phase curve observation through periapse passage will be the key to constraining the timescales of atmospheric response comma  and to measure changes in the atmospheric vertical structure and opacities in this atmosphere. Our investigation will disentangle the contributions of radiative comma  dynamical comma  and chemical processes at work in strongly irradiated atmospheres comma  enabling it to become a model for the broader class of Hot and Ultra-Hot Jupiters.
DOI: 10.15156/bio/sh1284319.09fu
title: SH1284319.09FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.57780/esa-yhcwlpm
title: 17191

description: Type Ia supernovae (SNe Ia) have long been used as standard candles to measure extragalactic distances and cosmological parameters. SNe Ia are portrayed as a homogeneous class comma  but there are actually several subtypes. Even the d_commanormald_comma SNe Ia used for cosmology may not be homogeneous. Recently comma  the optical light curves of SNe Ia have been shown to slow down comma  relative to their earlier decline rate comma  at >800 days after explosion. Moreover comma  more luminous SNe Ia may slow down faster than less luminous objects. This correlation comma  which recalls the peak-light stretch-luminosity relation used to standardize SNe Ia comma  also hints at the existence of several production channels for normal SNe Ia comma  as no single explosion model can produce the full range of late-time light curves. But this new correlation is based on just 6 objects. We ask for 67 WFC3-UVIS orbits (with the F438W comma  F555W comma  and F814W filters) spread over Cycles 30-32 to observe 12 SNe Ia when they are 600-1200 days old. By tripling the sample of late-time SNe Ia comma  we will prove the existence of the new stretch-luminosity correlation at a significance of >5-sigma. The impact on SN cosmology will be twofold. First comma  a new stretch-luminosity correlation could further standardize SNe Ia and reduce systematic uncertainties. Second comma  strong evidence for the existence of multiple production channels for normal SNe Ia would force cosmologists to revisit their use of SNe Ia as a monolithic class. This experiment is time critical. Every year comma  on average comma  <5 SNe Ia can be used for this experiment. We are lucky to have 12 targets to work with this year  this chance may not come again during HST.s remaining lifetime.
DOI: 10.57780/esa-ykepa43
title: 16445

description: ALMA has revolutionized the study of reionization-era galaxies. With the launch of JWST just over one year away comma  it is crucial to establish a local reference sample of high-redshift d_commaanalogd_comma galaxies covering essential UV comma  optical and FIR emission lines that will soon become available in the upcoming JWST+ALMA era. A local (z virgul 0.0040705) comma  metal-poor (12 + log(O-H) = 7.76) blue compact dwarf galaxy comma  Pox 186 comma  exhibits the brightest CIIICORCHETE_CLOSE 1908 emission (equivalent width virgul36 A) observed at any redshifts as revealed in the archival HST-COS observations comma  along with an extreme CORCHETE_OPENOIIICORCHETE_CLOSE 88-CORCHETE_OPENCIICORCHETE_CLOSE 158 (virgul 10). This extreme CIIICORCHETE_CLOSE is comparable to those observed in galaxies at redshifts of z virgul 6-7 comma  when the reionization process is thought to be completed. We request mid-cycle time to obtain COS spectroscopy for this galaxy comma  to probe Ly alpha  feature (emission and-or absorption) in addition to obtaining high S-N constraints on the UV nebular and stellar lines comma  as it will allow us to maximize the science return of a multiwavelength initiative involving radio comma  far-infrared and optical integral field spectroscopy. The proposed mid-cycle HST-COS observations will be very timely as they will provide directions to proposals for the upcoming observations using JWST comma  targeted to explore the epoch of reionization.
DOI: 10.15156/bio/sh1284320.09fu
title: SH1284320.09FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.57780/esa-ynui1v7
title: 16341

description: Monitor the bias in the 1x1 bin setting at gain=1 comma  and 1x1 at gain = 4 comma  to build up high-S-N superbiases and track the evolution of hot columns. Monitor the read noise for 1x1 binning for GAIN=1 and GAIN=4.
DOI: 10.15156/bio/sh1284321.09fu
title: SH1284321.09FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.57780/esa-yougxqt
title: 16795

description: We request 3 orbits of DD time to identify the cause of dust emission in newly discovered active asteroid P-2021 L4. The orbit of L4 is in the outer main belt comma  and similar to those of two other asteroids with confirmed activity likely driven by the sublimation of ice. However comma  the activity in L4 can be dated to an epoch more than 1.5 years after perihelion comma  which make sublimation-driven activity questionable comma  with possible alternatives being an impact or rotational mass shedding. We here seek to find out about the cause of activity from studying the distribution and dynamical evolution of dust and debris near the nucleus and in the dust tail comma  and to characterise the nucleus itself. This will help us to constrain the depth of buried ice in this outer-main-belt object comma  and lay the basis for follow-up observations during the next perihelion passage in 2025. We request DD time because L4 was discovered after the last regular GO proposal deadline comma  and because we expect the debris to disperse on timescales of weeks to a few months.
DOI: 10.57780/esa-ypdyte7
title: 16724

description: Hydrodynamic atmospheric escape is thought to be the main avenue for early evolution in exoplanets ranging from gas giants to terrestrial worlds comma  as shown by demographic studies resulting from the Kepler survey. However comma  with only three exoplanets to date that display smoking gun evidence of hydrodynamic escape comma  most modeling efforts to understand this process have been limited to semi-arbitrary assumptions and artificial test cases. This has a downstream effect that limits our capacity to assess if sub-Jovian planets are able to retain their volatile-rich atmospheres. While hot Jupiters are under no threat of losing significant fractions of their mass comma  they are the best targets to study hydrodynamic escape because they have detectable signals of exospheric metals in transmission spectroscopy. These signatures can only be observed by HST in the ultraviolet. In this program comma  we propose to observe the transmission spectrum of the ultra-hot Jupiter WASP-76b. We predict that this planet is losing mass at a rate 10 times larger than that of HD 209458b comma  and we can detect escape of Mg and Fe at more than 5-sigma confidence in high resolution. We further predict that the escaping material fills the Roche lobe of the planet and is in a state of geometric blow-off. Our results will automatically yield a precise near-UV transmission spectrum of WASP-76 b comma  a crucial measurement to probe opacity sources in its stratosphere and rainout of metallic species.
DOI: 10.15156/bio/sh1284322.09fu
title: SH1284322.09FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.