cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15156/bio/sh1284088.09fu
title: SH1284088.09FU

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-gkhpc8p
title: 16474

description: The program will commission and calibrate a specific mode of spectropolarimetry comma  which will provide the most widely useful capability (mode) for the science community  (R = 69 - 131) from 0.55 - 1.05 microns). In addition comma  the new spectropolarimetry observations will confirm comma  using on-orbit data comma  the corrections for the perpendicular transmission d_commaleak comma d_comma which ground testing suggested rises sharply redward of 0.8 microns in the POLV filters comma  and will help complete the recalibration of the polarimetry calibration coefficients using data from the recent calibration programs 13964 (PI McMaster) and 16008 (PI Desjardins).
DOI: 10.57780/esa-go6kj73
title: 16288

description: The properties of the circumgalactic medium (CGM) are governed by the details of galaxy formation comma  evolution and feedback.  The high ionization lines of OVI are the most effective probes of the warm-hot CGM of L* galaxies comma  because the ionization fraction of OVI peaks at the virial temperature of these galaxies. An important observational result in this field was published in Science  it showed that the prevalence and strength of the OVI lines depend on the specific star-formation rate (sSFR) of galaxies.  However comma  there is a clear correlation between sSFR and stellar mass in the observed sample comma  so the governing parameter may be mass instead.  Theoretical simulations are also providing conflicting results comma  therefore new observations are needed to inform the theory.  We propose to probe the CGM of L* galaxies at a range of sSFR comma  but at fixed mass. We will thus determine whether mass or sSFR is the driving factor of CGM properties comma  or there is additional physics. This will be a major step forward in our understanding of the physics of gas inflows and outflows comma  star-formation and feedback comma  and their relation to halo mass. This small program will greatly enhance the scientific return on previous investments of hundreds of orbits by clearly distinguishing between the possible scenarios.
DOI: 10.15156/bio/sh1284089.09fu
title: SH1284089.09FU

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-gs5dbjl
title: 16736

description: HST has completed a number of surveys for a wide range of exoplanets comma  enabling comparative planetology. In the dozens of planets studied thus far comma  clouds and hazes have been found to be prevalent comma  and are seen to hide spectroscopic features. The atmospheric properties of giant planets are expected to vary substantially as the compositions of their host stars change comma  and a host star.s metallicity should be an excellent proxy for the composition of the protoplanetary disk from it formed. Giant planets which formed in sufficiently metal-poor environments should in principle show marked differences in their atmospheric properties. In particular comma  planets around metal-poor stars should have preferentially clearer atmospheres and stronger molecular features comma  as there is less refractory elements such as Mg or Fe to make condensate clouds. The gas-phase chemistry will also change as key volatile ratios like C-O change. However comma  to date no hot Jupiters orbiting metal-poor stars (CORCHETE_OPENFe-HCORCHETE_CLOSE < -0.3) have been targeted by HST comma  with the vast majority found in metal-rich environments. Our program takes the next steps in comparative exoplanetology comma  targeting exoplants with reliably low stellar metallicities down to a new metal-poor extreme (CORCHETE_OPENFe-HCORCHETE_CLOSE < -0.49). This will provide the very first comprehensive atmospheric constraints for planets around metal-poor stars comma  which can then be compared to the plentiful metal-rich sample. A detailed comparison of stellar abundances to the spectral features as seen in the planet could reveal correlations that provide new insights into the atmospheric chemistry of hot Jupiters comma  and new insights into the nature of the planet-star metallicity connection.
DOI: 10.57780/esa-gu0f8ji
title: 16527

description: This program tracks the sensitivity of the Solar Blind Channel. The observations consist of SBC imaging and spectroscopy of the cluster NGC 6681 in order to monitor the temporal evolution of the UV sensitivity. All six filters and the two prisms will be used. Dark frames are also obtained. The sensitivity measurements are incorporated into the filter throughput tables and the IMPHTTAB. NotedoublePoint This program has been renamed from d_commaACS UV Contamination Monitord_comma for clarity.
DOI: 10.57780/esa-gvee9en
title: 16456

description: Exoplanets provide the only means of observing hydrodynamic atmospheric escape in action.  However comma  absorption by the interstellar medium (ISM) has so far prevented the observation of transits in the Lyman-alpha core.  Near the Lyman-alpha core comma  photons are plentiful and transits are deep.  Capitalizing on the recent discoveries of TESS comma  it is now possible to push past this limitation.  We have identified 2 planets confirmed since the last regular HST cycle in systems with radial velocities that shift the host star.s Lyman-alpha line away from ISM absorption.  These systems provide the potential to characterize the Lyman-alpha transits of planets smaller than Neptune and observe material escaping at velocities below 30 km-s for the first time.  Doing so would enable previously infeasible tests of outflow models.  It would also provide insight into the role of hydrodynamic escape in shaping the sub-Neptune planet population.  Lyman-alpha reconnaissance of these 2 systems is the prudent first step toward these goals.  Reconnaissance will eliminate key V1.0s regarding the host star.s intrinsic Lyman-alpha flux and the column depth of the intervening ISM.  At the same time comma  this program will check for signs of deep Lyman-alpha transits.  Doing so will enable informed planning of follow up observations to characterize the Lyman-alpha transits of the highest priority targets during the next regular HST cycle.
DOI: 10.15156/bio/sh1284090.09fu
title: SH1284090.09FU

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-gwirdh4
title: 16520

description: Every year comma  beginning with the SMOV comma  ACS-WFC has obtained multiband imaging of a moderately crowded stellar field in the globular cluster 47 Tuc (about 6. west of the core). Measured stellar positions and magnitudes are used to monitor local- and large-scale variations in the plate scale and the sensitivity of the detectors. Single exposures in each WFC subarray mode (512 comma  1K comma  2K) allow us to verify that photometry obtained in full-frame and in subarray modes are repeatable to better than 1%.   These observations will help validate and monitor the Cycle 24 redefined ACS subarray readouts comma  which now include all pixel columns for consistent timings. Although the new 512 comma  1K comma  and 2K subarrays are defined for all 4 readout amplifiers comma  the B amplifier subarrays are the current default for subarray requests comma  and the default for the WFC polarizers. This program will obtain only B-amplifier subarray exposures.  Cycle 29 will be the third year of consecutive observations of Omega Centauri globular cluster with standard ACS-WFC filters (in the same way as 47 Tuc). This cluster is a WFC3-UVIS calibration target. These ACS observations will be used for comparison of L-flat and filter-dependent distortion for ACS-WFC and WFC3-UVIS.
DOI: 10.57780/esa-gy4ww6s
title: 16701

description: Atmospheric spectroscopy of an exciting array of exoplanets (warm rocky planets comma  sub-Neptune comma  and Jupiter-mass planets) will be obtained during JWST.s Cycle 1. To accurately model and interpret observations of these planets. atmospheres comma  we must understand the high-energy SED of their host starsdoublePoint FUV and NUV-driven photochemistry shapes an atmosphere.s molecular abundances and the formation of hazes comma  EUV irradiation can erode a planet.s gaseous envelope comma  and flares can affect long term atmospheric stability.  A number of recent surveys have used HST.s UV capabilities to characterize the energetic irradiance spectra across a range of stellar masses comma  ages comma  and activity levels. While these surveys have proven invaluable for predicting photochemical tracers and evolution of an exoplanet.s atmosphere comma  they have also shown scatter in UV irradiance properties for stars of similar type. As a result comma  direct UV observations remain the gold standard for understanding the effects of the stellar irradiance on a specific exoplanet. We propose to obtain temporally-resolved UV (1150-3200 A) and X-ray stellar spectroscopy of the 23 JWST Cycle 1 targets without UV characterization data in the HST archive. Our proposed observations will provide the high-energy context necessary to determine the likelihood of atmospheric formation and retention comma  the identification and interpretation of atmospheric chemistry comma  and the impacts of stellar activity on the exoplanet atmospheric stability.
DOI: 10.15156/bio/sh1284091.09fu
title: SH1284091.09FU

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-gyv0ziw
title: 17263

description: A wealth of new theoretical and observational evidence supports now the idea that episodic accretion is a fundamental and common phenomenon across mass and time in star formation. In particular comma  the most recent discovery and follow-up of three accretion bursts from high mass young stellar objects (HMYSOs) have been key to link low- and high-mass star-formation mechanisms to the common ground of disk-mediated accretion. Among those comma  only one (S255IR NIRS 3) could be detected and studied at NIR wavelengths comma  just after the burst maximum. A new accretion burst from Mol77 comma  a 10 Msun protostar comma  begun in the first week of October 2022. This provides us with the unique chance to study such rare events from an early stage. We request HST-WFC3 observations to map the source and its outflow cavity to confirm the burst in the infrared. We will also derive the pre-burst spectrum of Mol77 comma  as the cavity walls still see the pre-outburst phase. Finally comma  we will for the first time measure the light echo with the HST for a HMYSO.
DOI: 10.15156/bio/sh1284092.09fu
title: SH1284092.09FU

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-gzywb5i
title: 16660

description: Existing on the extreme edges of the exoplanet population comma  ultra short period (USP) rocky planets offer new opportunities to study the physicochemical properties of planetary interiors comma  surfaces comma  and atmospheres. The immense irradiation and tidal forces experienced by these planets open observational avenues that remain closed for their long-period counterpartsdoublePoint their primordial atmospheres photoevaporate comma  opening their surfaces to observation  their tidally locked daysides melt and vaporize comma  enabling observation of surface material in new phase states  and unless heat is redistributed efficiently comma  their rock vapor atmospheres may condense on their cold nightsides. We propose for 11 orbits of WFC3 data to measure the phase curve of the lava world TOI-2431b comma  a rocky planet with a 5.4-hour orbital period comma  the shortest among planets with a known density. It is the best rocky planet for thermal emission studies using HST-WFC3 comma  and with the majority of the sky now surveyed by TESS comma  it is likely to remain so. The planet is expected to have lost its primordial atmosphere comma  but it may well possess a rock vapor atmosphere sustained by its surface magma ocean. These observations will allow us todoublePoint 1) determine the Bond albedo of the planet comma  which can constrain the properties of the surface magma ocean  2) to detect a rock vapor atmosphere or a thicker volatile atmosphere from its spectrum or the presence of a hotspot offset indicative of heat redistribution  and 3) constrain the interior structure by refining the planetary radius and iron mass fraction of the planet comma  which will help inform USP planet formation models and the design of future observations.
DOI: 10.57780/esa-h2fjc9c
title: 16820

description: The Space Telescope Science Institute (STScI) Director has decided to devote up to 1000 orbits of Director.s Discretionary time in observing Cycles 27-29 to a new Hubble Ultraviolet Legacy program focused on star formation and associated stellar physics. This new program comma  ULLYSES (UV Legacy Library of Young Stars as Essential Standards) comma  will provide a UV spectroscopic reference sample of young (< 10 Myr) high- and low-mass stars. It will target over virgul150 OB stars in the Magellanic Clouds and lower metallicity galaxies in the Local Group comma  and virgul40 T Tauri stars and brown dwarfs in the Milky Way. In addition comma  ULLYSES will monitor 4 typical T Tauri stars over different rotational phases through at least three rotation periods comma  and over timescales of months to years. The resulting library will provide template spectra of massive stars at metallicities substantially below the well studied comma  while the low mass sample will cover a wide range of ages comma  accretion rates comma  and masses comma  including objects down to well below 0.5 M_sun. The legacy of this large UV dataset on the first 10 Myr of stellar evolution will be enhanced by complementary datasets obtained by the scientific community. In addition to the core goals of the program related to stellar astrophysics of low and high mass stars comma  this data will also enable exciting science in the fields of ISM comma  CGM comma  jets comma  and exoplanets. ULLYSES will be modeled after the Frontier Fields programdoublePoint all data obtained will be non-proprietary. The implementation team at STScI is developing high-level science data products and a sophisticated database and website for disseminating data from the ULLYSES program and ancillary datasets for the ULLYSES target sample from space and ground-based facilities.
DOI: 10.57780/esa-h3hd4sr
title: 16580

description: This proposal acquires data to monitor relative changes in the UVIS photometric throughput using scanned observations. Traditionally comma  this program looks for the presence of contaminants on the optics via the flux of standard stars as a function of time and wavelength. Additional filters have been added to monitor sensitivity losses at longer wavelengths. Staring mode exposures are obtained via the Photometry Monitor program.
DOI: 10.15156/bio/sh1284093.09fu
title: SH1284093.09FU

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-h4gkcq0
title: 16921

description: Centaurs are the dynamical intermediary between the more distant and thermally pristine Trans-Neptunian Objects (TNOs) with the more processed and active Jupiter-Family Comets (JFCs). In the Centaur region between Neptune and Jupiter the thermal activation of many cosmogonically abundant volatile species occurs driving comae activity. Investigations of these distant comae provide salient data to test models of the solar system.s formation. To date thorough Centaur gas comae characterizations are prohibitive due to instrumental sensitivity limitations comma  however the newly launched James Webb Space Telescope (JWST) will provide the sensitivities necessary to probe Centaur gas comae. Six Centaurs have been approved for JWST Cycle 1 gas comae characterizations CORCHETE_OPENMcKay et al. 2021CORCHETE_CLOSE with additional contemporaneously acquired dust comae observations from other observatories. Of the six JWST Centaur targets 39P-Oterma is predicted to be beyond suitable characterization through ground-based assets during the Cycle 1 NIRSpec observations. We request 2 HST orbits during Cycle 29 (Jul. - Aug. 2022) of WFC3-UVIS imaging to contemporaneously characterize the dust coma of the Centaur 39P-Oterma during scheduled Cycle 1 JWST NIRSpec gas coma characterization. The tight comma  stable comma  and well characterized WFC3 PSF in combination with HST.s sensitivity to low surface brightness provide the only observational platform currently available to detect and isolate the flux from 39P.s dust coma from its nucleus contribution. If a suitable ramp up of comae activity occurs before the scheduled JWST observations we will forgo the HST observations comma  instead utilizing ground-based assets.
DOI: 10.57780/esa-h7oeo3a
title: 16451

description: ASASSN-14ko is a recently discovered comma  periodically flaring comma  nuclear transient within known AGN ESO 253-G003. The flares have a mean period of virgul114 days and a nonzero comma  negative period derivative. The exact origin of these UV-optical flares is currently V1.0. Here we propose a four epoch STIS UV set of observations of the next predicted flare in December 2020. The prior 6+ years of seventeen observed flares seen in ASAS-SN tightly constrains the predicted times of pre-flare quiescence comma  rise comma  peak comma  and decline. These observations will be part of a much larger followup effort but the UV spectroscopy is pivotal.  We will measure the evolution of UV absorption and emission lines from elements (e.g. comma  C comma  N comma  Si) and ionization states-potentials not seen in optical spectra comma  which will directly help distinguish whether or not these flares are caused by a partial TDE comma  AGN disk accretion comma  or another high energy phenomenon.