cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57780/esa-l7wt5nl
title: 16722

description: As we build towards robustly detecting and characterizing the atmospheres of terrestrial exoplanets with JWST comma  we cannot forget to take a close look at the low-mass stars they orbit. Complete coverage of M dwarf ultraviolet spectra are needed to determine the photochemical production rates of molecular species in terrestrial planet atmospheres comma  which will alert us to when disequilibrium chemistry comma  a sign of surface processes or even life comma  is present. High-energy spectra from the UV to X-ray are also needed to calculate mass loss rates from planetary atmospheres comma  which can explain the lack of atmospheres around highly-irradiated terrestrial worlds. LTT 1445Ab and GJ 486b are two of the most spectroscopically accessible terrestrial exoplanets we will ever find comma  and their M dwarf hosts are similarly at the top of their class in terms of observability. We will use the unique ultraviolet capabilities of HST comma  supplemented by X-ray observations comma  to provide complete short-wavelength spectral coverage for the stars LTT 1445A and GJ 486. Both planets comma  LTT 1445Ab and GJ 486b comma  will be observed in JWST Cycle 1 with the aim of detecting their atmospheres. If we do not take the opportunity to make UV measurements of their host stars while HST is still operational comma  this crucial input to understanding the atmospheres of these planets will be lost. We request 18 orbits with HST (COS and STIS) to capture complete UV spectra of LTT 1445A and GJ 486.
DOI: 10.15156/bio/sh1284154.09fu
title: SH1284154.09FU

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-l8f5iqb
title: 16776

description: Most massive stars are born in binary systems comma  with 70% expected to interact with a companion within their lifetimes. The consequences of these interactions for subsequent evolutionary stages and for the endpoints of stellar evolution are still not well understood comma  particularly for the red supergiant (RSG) phasedoublePoint the final evolutionary stage before supernova for the majority of massive stars. To improve our understanding of RSG binary systems we propose to characterise hot companions around RSGs in the Small Magellanic Cloud (SMC) using HST ultra-violet STIS spectroscopy. Using a combination of newly acquired photometric and archival spectroscopic observations comma  we have selected a sample of 28 of the highest probability RSG binaries in the Small Magellanic Cloud. From stellar evolutionary models and the small number of confirmed RSG binaries in the Galaxy comma  we expect the majority of hot companions to be either main-sequence B-type stars or binary interaction products (e.g. from the merger of higher-order multiple components). These observations allow us to characterise SMC RSG binary systems by accurately determining masses of the hot companions to break degeneracies in orbital solutions. The results of this proposal represent a significant advancement in the characterisation of hot companions to RSGs comma  in orbital configurations and mass ranges that will ultimately result in double compact object binary systems.
DOI: 10.57780/esa-l9hgfhd
title: 16408

description: This program will observe GD-153 to verify the flux calibration near the center of the field and at a couple of new positions using the WFC3 IR G102 and G141 grisms. The data will be used also to calculate wavelength solutions for the grisms comma  and will be compared with those derived from previous programsdoublePoint 15728 15587 15728 14994 14544 14386 14024 13579 13092 12702 12357 to check for any time evolution of the calibration.  This program will also observe GD-71 and GRW+70 to verify flux calibration and check time dependent sensitivity evolution of the G102 and G141 observing modes by comparing with previous observation (most recent programs being 14024 and 13575 for GD-71 and GRW+70 comma  respectively).
DOI: 10.15156/bio/sh1284155.09fu
title: SH1284155.09FU

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-lddit6a
title: 17148

description: Understanding how galaxies contributed to reionize the universe is one of the principal science goals of the James Webb space telescope (JWST). Because the IGM is neutral at high-redshift comma  and therefore optically thick to ionizing radiation (LyC) comma  JWST needs indirect LyC diagnostics calibrated on low redshift sources to unveil the sources of reionization. Here we propose the first sample selected based off their Mg II emission properties to have predicted LyC escape fractions. These 35 orbits of COS-HST observations will stringently test the best current LyC escape tracer in exactly the conditions that JWST will use it to infer the sources of cosmic reionization. Our mock JWST sample is completely different than any LyC sample as it is selected to have low neutral gas column densities. By comparing the Lyman Alpha and Mg II profiles we will understand the conditions when Mg II is optically thin and inform when JWST observations can use Mg II to measure the LyC escape fraction. The diverse physical properties of our sample and predicted LyC escape fraction will enable us to constrain the impact of dust and gas-phase metallicity in the inferred LyC properties. Two proposed targets are predicted to be extremely rare strong LyC emitters comma  while being normal star forming galaxies. If confirmed comma  these objects will provide a novel window into the escape of LyC. Beyond a simple test of confirmation comma  we will treat these observations as if they were up-coming JWST observations to demonstrate whether future JWST observations can recover the LyC escape fraction.
DOI: 10.57780/esa-lfb6flt
title: 16370

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-lggaehs
title: 17228

description: We have discovered a candidate young magnified supernova (SN) in a galaxy at redshift z=1.76 that is strongly lensed by the foreground RX J1347-1145 (z=0.451) galaxy cluster. Two lens models predict magnifications of 4--4.5 for the observed image of the transient. An ongoing SNAP program acquired imaging of the field on May 18th comma  and do not detect the SN candidate.  From imaging acquired on the program.s last visit to the field on May 30th comma  we detect a source with F110W = 25.8+-0.3 mag comma  with no detection in F606W.  Consequently comma  the first detection is when the SN is younger than 4 days in the rest frame at z=1.76.  If the SN is a Type Ia SN comma  it can be used to provide a novel test of galaxy cluster models. prediction at high magnification.  If a core-collapse SN comma  its addition would improve constraints on the core-collapse SN rate at z=1--2 from cluster-magnified supernovae (SNe) comma  which are in tension with that inferred from blank fields. Finally comma  the SN may reappear in virgul9.5 years in an arc of the same galaxy at much greater magnification comma  where it would be detected by LSST comma  and would provide an extremely precise time delay comma  constraints on the value of H0 comma  and test of lens models.  We propose to measure the light curve of the magnified SN comma  which should reach a peak in very early July if it is a Type Ia SN comma  and acquire a near-infrared G102 grism spectrum to determine its spectroscopic type.
DOI: 10.15156/bio/sh1284156.09fu
title: SH1284156.09FU

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-llqe0m8
title: 16312

description: We propose HST-WFC3 observations of the R Aqr symbiotic system comma  with joint Chandra and VLA observations comma  to carry out a high-angular resolution multiwavelength study of the binary environment and of the spatial and spectral characteristics and propagation of the ejecta resulting from the recent - earlier than expected - periastron passage of the WD accretor. The proposed observations follow up on the 2019 to early 2020 DDT-ToO HST+Chandra+VLA observations which show dramatic changes within 1d_comma from the central binary since 2018 comma  including newly ejected material obscuring the evolved Mira-type star and formation of a new jet.  The observations are critical for studying the effects of the WD periastron passage comma  which include enhanced accretion and mass-jet ejections in this nearby symbiotic binary.  These phenomena are observable only about twice a century comma  with the next periastron expected in about 40 years.
DOI: 10.15156/bio/sh1284157.09fu
title: SH1284157.09FU

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-lnbnen7
title: 16554

description: The purpose of this program is to monitor the sensitivity of the MAMA detectors over the full field. This is achieved by observing the globular cluster NGC6681 once during the cycle. The data can be directly compared with similar data obtained in previous cycles.
DOI: 10.57780/esa-loou8s4
title: 16711

description: As part of a systematic deep imaging survey with CFHT+MegaCam comma  96 ultra-diffuse galaxies (UDGs) in low to medium density fields have been identified. This UDG dataset is among the largest sample of this type of galaxy outside of galaxy clusters. Thanks to the high image quality of MegaCam comma  part of their globular clusters (GCs) population can already be detected and two populations of UDGs have been identifieddoublePoint one with an excess number and the other with a similar number of GCs compared to normal dwarfs. This GC candidate selection method was proven reliable for a UDG in the NGC 5846 group comma  using HST data that sampled most of the GCLF. This most extreme UDG hosts 40 GCs and a vast dark matter (DM) halo as massive as the Large Magellanic Cloud comma  but is less luminous by a factor of 50 comma  i.e. comma  is too massive for its stellar mass. However comma  VLT+MUSE spectroscopy suggests that based on the stellar velocity dispersion comma  this UDG hosts a rather small DM halo. Many of these properties are similar to those of the UDGs NGC1052-DF2 and -DF4 which comma  however comma  appear to have over-luminous GCs. This reveals a tension between the two different paths to measure the DM mass of a dwarf. We propose a SNAPSHOT program of 70 UDGs in non-cluster environments comma  employing two-band ACS imaging to trace the full population of GCs 3 magnitudes below the peak of the GCLF and give us an accurate estimate of the total number of GCs. We will characterize their GC systems and test whether some UDGs host an exceptionally large number of GCs comma  but with a regular GCLF comma  or contain a population consisting of only over-luminous GCs. Both cases pose a conundrum for our undertanding of GC and galaxy formation.
DOI: 10.15156/bio/sh1284158.09fu
title: SH1284158.09FU

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-lrpgxh1
title: 16859

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/sh1284159.09fu
title: SH1284159.09FU

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-lrpygq4
title: 16852

description: We request 6 orbits of observing time to investigate the aftermath of a 7 magnitude series of outbursts of centaur 29P-Schwassmann-Wachmann using WFC3-UVIS. At 5.5 au from the Sun comma  this object is known for its irregular activity. The series of outbursts that started this week (9-27) are the largest on record comma  making the object brighter than ever before. The event provides a unique opportunity to study material ejected from below the surface and to investigate what processes drive these large outbursts.  The versatility of WFC3 is necessary to search for fragments comma  characterize the morphology and amount of the ejected material comma  and use narrow and medium band filters to evaluate dust color and content. We request three 2-orbit visits to characterize the ejecta around 29P and to perform a deep search for 100 meter diameter fragments. We will determine the dynamical and color evolution of the ejecta to constrain the kinematics and thus the possible mechanisms of the outbursts. Only HST is capable of capturing the high spatial resolution images necessary to capture faint fragments near the active 29P nucleus to investigate the outbursts and their source.
DOI: 10.57780/esa-ltidf3b
title: 16651

description: Actively accreting protoplanets offer a direct view of a critical phase of planet formation and help set the initial state of planets. entropy and luminosity evolution. However comma  discoveries of these planets are extremely rare comma  with the young PDS 70 transition disk system being the only example. Recent HST observations of the few-Jupiter mass planet PDS 70 b demonstrate the WFC3-UVIS instrument.s excellent performance in directly detecting the H-alpha emission from the protoplanet. This new development enables a promising strategy to search for accreting protoplanetdoublePoint high-contrast imaging observations of faint stars that host gapped transitional disks. These stars are not accessible to ground-based adaptive optics.  We select ten stars that are most likely to yield planet detections and propose HST-WFC3-UVIS direct imaging observations in the F656N filter. These observations will form a high-quality point spread function library that facilitates precision primary subtraction. The processed images will be sensitive to accreting sub-Jovian-mass planets in the transitional disk gaps comma  and therefore comma  have the potential to significantly increase the number of protoplanet discoveries.