cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57780/esa-awd28nj
title: 16215

description: SN2016iet is an unprecedented supernova in terms of its temporal evolution comma  spectra comma  and environment. The light curve exhibits two distinct peaks separated by 100 days comma  and slowly decline by only 5 mag in 2.5 years.  The spectra are dominated by a blue continuum and low velocity calcium and oxygen lines with an unusually high Ca-O ratio comma  but lack hydrogen or helium. The SN is located at an unusually large offset (16 kpc comma  5 effective radii) from a low metallicity dwarf galaxy (0.1 Zsun comma  3e8 Msun). Modeling of the SN data indicates that it is powered by interaction of 20-85 Msun of ejecta with 35 Msun of H-He-free circumstellar material (CSM) comma  ejected in the final decade before explosion. Thus comma  the progenitor.s CO core shortly before explosion was 55-120 Msun comma  placing it in the regime of pulsational pair instability or pair instability explosions comma  further supported by the low metallicity. This is the first robust case for such an origin based directly on a large progenitor mass and low metallicity. We request observations of this unprecedented SN to achieve several goals that can only be done with HSTdoublePoint (i) track the SN emission at >1000 days post explosion comma  as it fades below ground-based capabilities comma  to track the large-scale CSM  (ii) use NIR data to search for the first time for evidence of dust formation in H-He-poor CSM interaction  (iii) measure the UV brightness of the host galaxy to precisely determine its star formation activity and escape fraction of ionizing radiation  and (iv) search for a potential underlying galaxy at the SN position comma  which from existing limits will be <1e-3 L*.  This will be accomplished with 4 orbits in Cycle 27 and 3 orbits in Cycle 28.
DOI: 10.57780/esa-ayk9fc4
title: 16481

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: 10.15156/bio/sh1284014.09fu
title: SH1284014.09FU

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-ayvrq1g
title: 16646

description: Characterizing potentially habitable planets around low mass stars is a key focus of current and upcoming missions such as JWST and TESS. This focus stresses the need for a comprehensive understanding of the radiation environments in which such planets reside. Low-mass stars are typically much more active than solar type stars and the proximity of their habitable zones can be one tenth the distance. The far-ultraviolet (FUV) radiation emitted by these stars has the potential to alter an orbiting planet.s atmospheric photochemistry comma  while the extreme-ultraviolet (EUV) radiation can cause the loss of planetary atmospheres and surface volatiles. Ly-a emission at 1216 A is the dominant radiation source for low mass stars at FUV wavelengths and is critical for informing stellar atmosphere models used to predict the EUV spectrum comma  but directly measuring a low-mass star.s Ly-a emission is almost always impossible because of the contaminating effects of interstellar hydrogen. Using Gaia DR2 comma  we have identified a unique sample of six low mass stars for which a complete and accurate measurement of their Ly-a line profile is possible due to their very large radial velocities. Stars with very large radial velocities (>100 km-s) will have their Ly-a emission Doppler shifted away from contaminating sources allowing for the rare opportunity to measure intrinsic Ly-a emission. These proposed observations of this rare sample of stars will triple the number of stars with Ly-a emission measured in this way and will improve the accuracy of computed spectra for all low-mass stars across wavelengths that drive planetary atmospheric evolution.
DOI: 10.57780/esa-az68gta
title: 16779

description: TOI 560.01 is a mini Neptune orbiting a young (400-600 Myr) and nearby (32 pc) K star comma  the first and only mini Neptune with measured helium absorption from its photoevaporating atmosphere.  We propose to observe three transits of the planet with STIS-G140M in order to measure Lyman alpha absorption from the outflow.  Photoevaporation is especially interesting to probe in this regime because it predominantly occurs in the active youth of a star.s life comma  creating the ''Fulton gapd_comma in radius which divides super-Earths (1--1.8 REarth) from mini-Neptunes (2--3 REarth). These observations will allow us to measure the size comma  shape comma  and kinematic structure of the exosphere comma  constrain the mass loss rate comma  and evaluate the magnitude of any visit-to-visit variability in the outflow structure.  The combination of Lyman alpha and He I 1083 nm observations will provide stringent constraints on hydrodynamical models.  These two wavelengths provide complementary informationdoublePoint Ly alpha probes high-velocity hydrogen in the tenuous outer reaches of the exosphere comma  while helium probes low-velocity helium in the denser part of the exosphere comma  much closer to the planet surface.  Finally comma  recent TESS observations indicate that there may be another transiting planet in the TOI 560 system on an exterior orbit comma  although it has not yet been confirmed.  Multi-planet systems are ideal for studying mass loss because the two planets share the same high-energy irradiation history and similar formation histories comma  making comparative planetology possible.
DOI: 10.15156/bio/sh1284015.09fu
title: SH1284015.09FU

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-azblr37
title: 16797

description: We propose to create a legacy map of the southern half of M31 in the optical and near ultraviolet (NUV).  The Panchromatic Hubble Andromeda Southern Treasury (PHAST) will add virgul100 million stars to M31.s stellar photometry archive and cover regions of M31 that are structurally unique and more sensitive to the merger history than the northern disk mapped in the Panchromatic Hubble Andromeda Treasury (PHAT).   These newly mapped regions include the intersections with M32 and the giant southern stream comma  the split portion of the star forming ring comma  and the southern bar.  By providing age comma  metallicity comma  stellar mass comma  and follow-up kinematics comma  the resolved stellar photometry of these regions will be used for detailed comparisons to simulations comma  including star formation history and population asymmetries as well as the orbits of M32 and the giant southern stream comma  allowing us to distinguish between competing merger scenarios.  Thus comma  these measurements tightly constrain models of M31.s merger history and disk evolution.  Furthermore comma  the legacy value for such observations is undeniable  M31 has been and will continue to be a centerpiece target for many NASA and ESA missions comma  as well as for ground-based time-domain observations that could find extremely valuable events that require HST resolution for identifying precursors.  These current and future data sets cover the entire galaxy comma  and thus comma  our coverage will increase the value of all past and future M31 observations.  PHAST will complete a lasting baseline data set for this high-demand target that no other current or planned facility will be able to produce.
DOI: 10.15156/bio/sh1284016.09fu
title: SH1284016.09FU

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-b0rmng9
title: 16534

description: This program monitors the stability of the constant terms in the FUV dispersion solutions. To monitor for any changes comma  the program observes AV 75 at selected cenwaves at multiple FP-POS positions for all FUV gratings. Via cross-correlation comma  spectra are compared to those obtained in previous iterations of the program comma  to STIS spectra obtained in-orbit comma  and to a model.
DOI: 10.57780/esa-b5rolo9
title: 16772

description: LINER nuclei comma  the long-lived comma  low-accretion-rate states of supermassive black holes comma  are critical for understanding the AGN phenomenon in the context of galaxy evolution. Observations have established the presence of black-hole related activity in most LINERs. But comma  we have also learned that the line emission on virgul1d_comma (virgul100 pc) scales comma  used for LINER classification with ground-based data comma  is not balanced by the radiative energy output of the nucleus alone. Another comma  V1.0 power source provides most of the power on these scales. The leading candidate is centrally-driven outflows of gas that carry at least as much power as the radiative luminosity of the AGN and produce optical emission lines through shock heating. Past HST case studies of four LINERs have spatially resolved the line-emitting regions comma  suggested a transition from photoionization on scales of tens of pc to shock excitation on larger scales comma  and allowed estimates of the kinetic power. Thus comma  LINERs may be signposts of feedback from the AGN onto the host galaxy. As such comma  they help us understand more distant comma  important objects. But a larger comma  truly representative sample comma  spanning a wider range of LINER AGN properties comma  is needed to test and generalize those results. We propose optical spectroscopy comma  spatially resolving virgul0.1 arcsec scales comma  for a diverse and representative sample of 15 LINERs. We have designed an economical observing program by exploiting spectra available in the archive for a large fraction of the targets. We will carry out the first comprehensive mapping and exploration of the excitation of LINER gas using multi-dimensional line-ratio diagrams on scales of virgul10 pc.
DOI: 10.15156/bio/sh1284017.09fu
title: SH1284017.09FU

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-b6hc4t4
title: 16550

description: This program uses the Tungsten calibration lamp to generate medium resolution spectroscopic CCD flats to determine the pixel-to-pixel variation for CCD spectroscopic observations with STIS. These data will be used to produce the Cycle 29 reference p-flats for the m- and l-modes.
DOI: 10.15156/bio/sh1284018.09fu
title: SH1284018.09FU

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-b806z52
title: 16383

description: 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. Two SBC dark frames will follow the orbits.  Results will be incorporated into the TDSTAB for the SBC.
DOI: 10.57780/esa-b9rj6g1
title: 16656

description: We propose to obtain a series of three early-time UV spectra of one stripped-envelope core-collapse supernova (either a normal SN Ib or a normal SN Ic comma  whichever type is not observed in an approved Cycle 28 program) comma  starting well before maximum brightness. The underlying nature of these objects comma  from the mass-loss process stripping the envelope to the details of the explosion mechanism comma  remain mysterious. Connections to gamma-ray bursts and X-ray flashes further motivate this study. Many high-redshift SNe are being found in deep transient surveys comma  but the ability to distinguish between thermonuclear Type Ia SNe and stripped-envelope core-collapse SNe requires thorough knowledge of the latter at UV wavelengths with a low-z object. By comparing the evolution of the spectra as the photosphere recedes to deeper layers of the ejecta with our time series of spectral models comma  we will gain a better understanding of the explosion mechanism and the degree of mixing during the explosion. Moreover comma  we should be able to determine the metal content of the progenitor.s outer layers with our spectral models and compare with the measured metallicity of the environment. The heterogeneity seen in stripped-envelope SNe compels us to choose a normal SN Ib or SN Ic comma  objects with DIFFERENT characteristics than the ones that HST has observed in previous Cycles (SNe Ic-pec comma  IIb comma  Ibn) comma  thereby gaining further insights into this unique class of cosmic explosion. We need to seize this opportunity now comma  while we have access to the space UV comma  and indeed the UV is an HST Cycle 29 priority.
DOI: 10.15156/bio/sh1284019.09fu
title: SH1284019.09FU

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-bbdffij
title: 16568

description: This UVIS daily monitor program obtains full-frame comma  four-amp readout bias and dark frames.  All exposures are post-flashed at a 20 e--pixel level  a separate program (16569) will be used to obtain un-flashed UVIS darks to monitor non-postflashed behavior. The biases and darks from this proposal comma  in addition to those that are obtained as part of the WFC3-UVIS anneal program (16564) comma  will be used to create superbias and superdark calibration reference files for the Calibration Reference Data System (CRDS) and monitor the evolution of hot pixels comma  dark current comma  bias level and readnoise.  This is the third of three daily monitoring programs of Cycle 29 (the others are 16566 and 16567).  It covers July 19 through November 20th comma  2022. The combination of the three programs provides full coverage of Cycle 29.
DOI: 10.15156/bio/sh1284020.09fu
title: SH1284020.09FU

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-bbhj4s2
title: 16962

description: This calibration program is for obtaining STIS NUV MAMA Dark on a regular basis. The basic monitor takes two 1300s TIME-TAG darks bi-weekly.  The pairs of exposures are linked so that they are taken about 6 hours apart in the same SAA free interval.  This pairing of exposures will make it easier to separate long and short term temporal variability from temperature dependent changes.