HST Director's Discretionary Programs

Wed Dec 10 03:30:03 EST 2025

Cycle	ID	PI	Institution	Title	Allocated Orbits
33	18222	Hannah Diamond-Lowe	Space Telescope Science Institute	Rocky Worlds DDT: HST Observations of LHS 1140	18
33	18220	Kishore Patra	University of California - Santa Cruz	Multiwavelength JWST and HST observations of the off-nuclear TDE AT 2025abcr	1
33	18216	Kevin France	University of Colorado at Boulder	A Three-Dimensional Panchromatic View of Active Regions and CMEs on the Young Solar-Type Star AB Dor	8
33	18215	Juan Rizos	Instituto de Astrofisica de Andalucia (IAA)	Supporting the JUICE mission through HST astrometry of Kallichore	2
33	18214	Conor Ransome	University of Arizona	Spectral Synergy of SN2023ixf: A unique insight into a nearby, radio- bright core-collapse supernovae.	6
33	17995	Amy Simon	NASA Goddard Space Flight Center	Hubble 2020: Outer Planet Atmospheres Legacy (OPAL) Program	41
32	18213	Luming Sun	Anhui Normal University	Imaging of EP241021a during the flattening in the optical light curve: an exotic gamma-ray burst or a peculiar jetted tidal disruption event?	2
32	18209	Christopher Britt	Space Telescope Science Institute	Narrowband observations of protostellar outflows in M20	6
32	18206	Christopher Britt	Space Telescope Science Institute	Narrowband Imaging of NGC 3372	6
32	18175	Xander Hall	Carnegie Mellon University	Chasing Binary Black Hole Merger candidate AT2025smm	3
32	18152	Man-To Hui	Shanghai Astronomical Observatory, CAS	Monitoring Interstellar Object 3I/ATLAS Departing the Solar System	10
32	17990	Daniel Lawther	University of Arizona	A strong test for accretion disk buildup in a changing-look AGN	1
32	17988	Andrew Levan	Radboud University Nijmegen	Galactic or extragalactic? Unravelling the extraordinary GRB 250702BDE	1
32	17933	Ning Jiang	University of Science and Technology of China	Turn-on AGN or IMBH-TDE? UV Spectroscopic Observations May Tell	4
32	17904	Hannah Diamond-Lowe	Space Telescope Science Institute	Rocky Worlds DDT: HST Observations of GJ 3929	24
32	17903	Hannah Diamond-Lowe	Space Telescope Science Institute	Rocky Worlds DDT: HST Observations of LTT 1445A	12
32	17894	Yuhan Yao	University of California - Berkeley	HST imaging and spectroscopy of the first off-nuclear tidal disruption event candidate	4
32	17892	Doyee Byun	University of Michigan	A Coordinated UV and X-ray Reverberation Study of NGC 4151 at High Spectral Resolution	9
32	17889	Anna Ho	Cornell University	Tracking the Emergence of an Accretion Disk in an LFBOT	6
32	17883	Christopher Britt	Space Telescope Science Institute	Broadband imaging of NGC 5335	6
32	17882	Christopher Britt	Space Telescope Science Institute	Narrowband Imaging of NGC 6888	4
32	17879	Christopher Britt	Space Telescope Science Institute	A UV and Optical View of Martian Clouds	6
32	17855	Christopher Britt	Space Telescope Science Institute	Narrowband Imaging of NGC 2899	3
32	17843	Amy Simon	NASA Goddard Space Flight Center	Hubble 2020: Outer Planet Atmospheres Legacy (OPAL) Program	41
31	17881	Meridith Joyce	University of Wyoming	Far-UV detection of the low-mass companion responsible for Betelgeuse's long secondary period	4
31	17856	Christopher Britt	Space Telescope Science Institute	Narrowband Imaging of Caldwell 49	6
31	17854	Jean Somalwar	University of California - Berkeley	Late time constraints on a luminous LFBOT-TDE intermediate	2
31	17849	Ning Jiang	University of Science and Technology of China	Probing the UV spectral evolution of a unique TDE with early bright X-ray emission	4
31	17848	Benjamin Proudfoot	University of Central Florida Board of Trustees	Astrometry for an Upcoming Double Occultation of Salacia-Actaea	2
31	17695	Patrick Godon	Villanova University	Multiwavelength Campaign of the Extraordinary Novalike Cataclysmic Variable BZ Camelopardalis	2
31	17614	Kyra Bostroem	University of Arizona	Exploring the Ultraviolet Evolution of SN 2024ggi: Unveiling Red Supergiant Mass Loss with HST Spectroscopy	6
31	17610	Stefano Valenti	University of California - Davis	Late time UV spectroscopy of SN 2023ixf in M101: Unique constraints on the progenitor mass loss history	10
31	17609	Ning Jiang	University of Science and Technology of China	A UV spectroscopic View of the 2024 outburst of AT2020afhd: A Unique Opportunity to Test the Reprocessing model of Tidal Disruption Event	2
31	17294	Amy Simon	NASA Goddard Space Flight Center	Hubble 2020: Outer Planet Atmospheres Legacy (OPAL) Program	41
30	17585	Peter Gao	Carnegie Institution of Washington	The Discovery of a Fourth Low-Mass Planet in an Unusual Super-Puff System	12
30	17398	Christopher Britt	Space Telescope Science Institute	Narrowband Imaging of M76	12
30	17397	Subo Dong	Peking University	Confirming the first isolated dark stellar remnant candidate discovered by interferometric microlensing	2
30	17396	Antonio Martin-Carrillo	University College Dublin	Revealing the progenitor of the dirty fireball gamma-ray burst AT 2023lcr through its supernova component	3
30	17330	Jian-Yang Li	Sun Yat-Sen University	Deep Imaging of Dimorphos's Dust Tail	10
30	17315	Estela Fernandez-Valenzuela	University of Central Florida Board of Trustees	Beating Weywot in the game of hide-and-seek	1
30	17314	Jean Somalwar	University of California - Berkeley	HST/STIS spectroscopy of AT2020vdq: diagnosing fast outflows in a remarkably energetic partial tidal disruption event	2
30	17313	Kyra Bostroem	University of Arizona	Tracing the UV CSM interaction over the first 50 days in the extremely nearby SN 2023ixf in M101	4
30	17305	Kevin France	University of Colorado at Boulder	An X-ray through Radio Exo-Space Weather Campaign to Study the Infant Sun DS Tuc	12
30	17298	Eleonora Troja	Universita degli Studi di Roma Tor Vergata	The afterglow, supernova and distance scale of a record-breaking gamma-ray burst	3
30	17293	David Jewitt	University of California - Los Angeles	The Boulder Field of Didymos	16
30	17292	Jian-Yang Li	Sun Yat-Sen University	Long-Term Evolution of Dimorphos's Dust Tail Created by the DART Impact	9
30	17291	Colin Chandler	University of Washington	Investigating a Vanishing Active Centaur	1
30	17266	Christopher Britt	Space Telescope Science Institute	Broadband imaging and H-alpha of NGC 1333 and associated HH objects	30
30	17264	Andrew Levan	Radboud University Nijmegen	Unique opportunities from the brightest gamma-ray burst of all time	7
30	17263	Ruben Fedriani	Instituto de Astrofisica de Andalucia (IAA)	Catching the accretion burst of a massive protostar on the rise with the HST	2
30	17254	Jacqueline Keane	National Science Foundation	Determining the Driver of Activity in a Newly Discovered Main Belt Comet	2
30	16995	Amy Simon	NASA Goddard Space Flight Center	Hubble 2020: Outer Planet Atmospheres Legacy (OPAL) Program	41
29	17296	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Supplemental FUV Exposures for LMC O Stars - COS	5
29	17295	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Supplemental FUV Exposures for SMC O Stars - COS	5
29	17253	Patrick Kelly	University of Minnesota - Twin Cities	Imaging and Spectroscopy of Three Highly Magnified Images of a Supernova at z=1.5	3
29	17245	Arianna Miraval Zanon	Agenzia Spaziale Italiana (ASI) Science Data Center (ASDC)	Unveiling the UV pulse emission mechanism in the accreting millisecond X-ray pulsar SAX J1808.4-3658 during its 2022 outburst	1
29	17231	Tommaso Treu	University of California - Los Angeles	The high redshift universe in full color and high resolution: the power of HST and JWST	15
29	17228	Patrick Kelly	University of Minnesota - Twin Cities	A Supernova in a Magnified Multiply Imaged Galaxy at Redshift z=1.76	10
29	16943	Ning Jiang	University of Science and Technology of China	Exploring the Nature of the Recurring Flare in ULIRG F01004-2237 with UV spectroscopic Diagnosis	5
29	16933	Meredith MacGregor	The Johns Hopkins University	The Origin and Impact of Flares in M Dwarf Systems	9
29	16931	Lin Yan	California Institute of Technology	HST High Resolution UV Spectroscopy of the Second Closest Luminous SLSN-IIn	3
29	16930	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Sextans A COS Spectroscopy	20
29	16929	David Jewitt	University of California - Los Angeles	Disintegration of Long-Period Comet C/2021 A1	4
29	16911	Stephen Cenko	NASA Goddard Space Flight Center	The Host Galaxy and Environment of the Unusual Transient AT2022cmc	3
29	16905	Missagh Mehdipour	University of Michigan	Capturing the transient obscuring wind in Mrk 841 with HST	1
29	16904	David Jewitt	University of California - Los Angeles	Disintegrating Comet 108P/Ciffreo	3
29	16903	Or Graur	University of Portsmouth	Late-time imaging of Type Ia supernova SN 2017erp	3
29	16872	Norman Grogin	Space Telescope Science Institute	CANDELS/UDS B-band Supplemental	44
29	16868	Saida Caballero Nieves	Embry-Riddle Aeronautical University	Science now with HST FGS: High Angular Resolution Survey of B Stars	21
29	16860	Christopher Britt	Space Telescope Science Institute	Optical and Infrared imaging of the dark cloud CB 130-3	4
29	16859	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES T Tauri Survey Stars in Corona Australis	13
29	16858	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES M-Type T Tauri Survey Stars in Lupus III: Part 4	20
29	16857	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES M-Type T Tauri Survey Stars in Lupus III: Part 3	12
29	16856	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES M-Type T Tauri Survey Stars in Lupus III: Part 2	26
29	16855	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES M-Type T Tauri Survey Stars in Lupus III: Part 1	27
29	16854	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Late K-Type T Tauri Survey Stars in Lupus III and IV	24
29	16853	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES T Tauri Survey Stars in Lupus II	18
29	16852	Dennis Bodewits	Auburn University	Characterizing the aftermath of mega-outbursts of Centaur 29P	6
29	16826	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC B2-B3 Supergiants - COS and STIS	6
29	16825	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O7 Supergiants - COS and STIS	6
29	16824	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC Late-O Dwarfs - COS and STIS	8
29	16823	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC Mid-O Giants - COS and STIS	5
29	16822	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O5 Dwarfs - COS and STIS	9
29	16821	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O6 Bright Giants - STIS	2
29	16820	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O5-O6 Dwarfs - STIS	11
29	16819	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O9-B1 Bright Giants - COS	5
29	16818	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O7-O8 Dwarfs - COS	7
29	16817	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O5 Supergiants - COS	2
29	16816	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O5 Giants - COS	8
29	16815	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O5-O6 Dwarfs - COS and STIS	9
29	16814	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O4 Dwarfs - COS	7
29	16813	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O3 Supergiants - COS	8
29	16812	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O2 Supergiants - COS	4
29	16811	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O2 Giants - COS and STIS	8
29	16810	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O2 Dwarfs - COS	9
29	16809	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC OB Stars - COS and STIS	14
29	16808	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC O3 Dwarfs - COS	1
29	16807	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC Late O Stars - STIS	11
29	16805	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC O4 Supergiants - STIS	1
29	16803	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC O6 Giants - COS	5
29	16802	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC O3-O5 Dwarfs - COS	4
29	16790	Amy Simon	NASA Goddard Space Flight Center	Hubble 2020: Outer Planet Atmospheres Legacy (OPAL) Program	41
29	16599	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES T Tauri Survey Star HD 104237E in Eps Cha	8
29	16598	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES T Tauri Survey Star WZ Cha in Cha I	7
29	16597	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Late K- and Early M-type T Tauri Survey Stars in Cha I	29
29	16596	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Late K- and Mid M-type T Tauri Survey Stars in Cha I and Eta Cha	21
29	16595	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Mid M-type T Tauri Survey Stars in Eta Cha	8
29	16594	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES T Tauri Survey Star V505 Ori in Sigma Ori	4
29	16593	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES T Tauri Survey Star RX J0438.6+1546 in Taurus	5
29	16592	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Monitoring Observations of the T Tauri Star RU Lup: Second Epoch	12
29	16591	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Monitoring Observations of the T Tauri Star TW Hya: Second Epoch	12
29	16590	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Monitoring Observations of the T Tauri Star GM Aur: Second Epoch	12
29	16589	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Monitoring Observations of the T Tauri Star BP Tau: Second Epoch	12
28	16848	Christopher Britt	Space Telescope Science Institute	Imaging of Compact Cluster HCG 40	6
28	16795	Jessica Agarwal	Technische Universitat Braunschweig	Dust emission process in newly discovered active asteroids P/2021 L4	3
28	16511	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES NGC 3109 COS Spectroscopy	9
28	16496	Man-To Hui	Shanghai Astronomical Observatory, CAS	323P/SOHO: The First Short Period Near-Sun Object Observed to Disintegrate	4
28	16494	Michael McDonald	Massachusetts Institute of Technology	Re-Testing the Limits of AGN Feedback in Central Cluster Galaxies	4
28	16493	Nicole Karnath	Space Science Institute	Investigating the Outflows and Shocks of HOPS 361	12
28	16492	Steven Goldman	Space Telescope Science Institute	SOFIA and HST Multi-wavelength Study of the Symbiotic Mira HM Sge	4
28	16482	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES K- and Early M-type T Tauri Survey Stars in Cha I	11
28	16481	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Mid M-Type T Tauri Survey Stars in Cha I	21
28	16480	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES T Tauri Survey Star ECHA J0844-7833 in eta Cha	5
28	16479	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES T Tauri Survey Stars in Lupus III and IV	25
28	16478	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Two M5 T Tauri Survey Stars in Cha I	9
28	16477	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES mid M-type T Tauri Survey Stars in Lupus I	24
28	16476	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES T Tauri stars in Lupus	12
28	16465	Junjie Mao	Hiroshima University	Chasing obscuring wind in the quasar MR 2251-178	1
28	16435	Christopher Britt	Space Telescope Science Institute	Imaging of Arp 143	6
28	16434	Christopher Britt	Space Telescope Science Institute	Imaging of AG Car	10
28	16375	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC Late B Stars COS and STIS	25
28	16374	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC late-B Stars COS and STIS	16
28	16373	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC B1.5, B2 stars COS	8
28	16372	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC O7 to O9 Stars COS	15
28	16371	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC O8-O9 Stars COS	16
28	16370	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC O, OC, & WN Stars - COS	15
28	16369	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O3 Stars- COS	10
28	16368	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC B1-B2 Stars STIS	21
28	16367	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC WN Stars STIS	6
28	16366	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC B0 to O9 Dwarfs STIS	8
28	16365	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O9-B0 Supergiant STIS	14
28	16364	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O4 Stars	7
28	16266	Amy Simon	NASA Goddard Space Flight Center	Hubble 2020: Outer Planet Atmospheres Legacy (OPAL) Program	41
28	16115	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES K and M-type T Tauri stars in Orion OBIb Star Forming Region	23
28	16114	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES K-type T Tauri stars in Orion OBIb Star Forming Region	19
28	16113	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES K-type T Tauri stars in the Orion OBIb and Sigma Ori Star Forming Regions	17
28	16110	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Monitoring Observations of the T Tauri Star RU Lup: First Epoch	12
28	16109	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Monitoring Observations of the T Tauri Star TW Hya: First Epoch	12
28	16108	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Monitoring Observations of the T Tauri Star GM Aur: First Epoch	12
28	16107	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES Monitoring Observations of the T Tauri Star BP Tau: First Epoch	12
27	16433	Edward Cackett	Wayne State University	Has the UV broad line region around the black hole in Mrk 279 been disrupted?	1
27	16418	Qicheng Zhang	Lowell Observatory	Bright Near-Sun Comet C/2020 F3 (NEOWISE)	2
27	16417	Marianne Vestergaard	University of Copenhagen, Niels Bohr Institute	Constraining the threshold luminosity limit for broad line production in AGN	1
27	16112	Marc Buie	Southwest Research Institute	HIgh-precision astrometry of (15094) Polymele in support of the Lucy Mission	3
27	16111	David Jewitt	University of California - Los Angeles	Breakup of Long-Period Comet C/2019 Y4 (ATLAS)	2
27	16104	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES UV Pre-imaging of Sextans A and NGC 3109 Targets	6
27	16103	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC O Stars COS 1096	17
27	16102	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC B2 to B4 Supergiants COS/STIS	16
27	16101	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC B1 Stars COS	12
27	16100	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC O7-O9 Giants COS	8
27	16099	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC late-O/early B Supergiants STIS	13
27	16098	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES SMC O Stars STIS	3
27	16097	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC B4-5 Supergiants COS+STIS	10
27	16096	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O9-B1 stars COS	15
27	16095	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O5/O6 Stars COS	5
27	16094	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O4 Stars COS	6
27	16093	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC Early O/WN Stars - COS	8
27	16092	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC Wolf-Rayet STIS	8
27	16091	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O7/O8 stars STIS	12
27	16090	Julia Roman-Duval	Space Telescope Science Institute	ULLYSES LMC O2/O3 Stars STIS	11
27	16067	David Bennett	University of Maryland	Mass Measurement of Isolated Black Hole Candidate MOA-2019-BLG-284L via Lensed Image Separation	6
27	16058	Christian Knigge	University of Southampton	Far-Ultraviolet Spectroscoy of the Transient Accreting Black Hole MAXI J0630	1
27	16057	Michael Wong	University of California - Berkeley	Dark Vortex Disruption	5
27	16056	Keith Noll	NASA Goddard Space Flight Center	Recovery and Orbit of a Satellite of the Trojan Asteroid Eurybates - a Lucy Mission Target	12
27	16055	Margarita Karovska	Smithsonian Institution Astrophysical Observatory	UNEXPECTED EARLY PERIASTRON PASSAGE AND ECLIPSE IN THE SYMBIOTIC SYSTEM R AQR	3
27	16051	Andrew Levan	Radboud University Nijmegen	A long gamma-ray burst in an ancient galaxy	2
27	16032	Carl Melis	University of California - San Diego	A dusty outburst at WD0145+234: real-time disintegration of a massive rocky body?	6
27	16026	Tzu-Yu Hung	University of California - Santa Cruz	Caught in the Act: Closest TDE Discovered Before Peak Light	4
27	16010	Connor Robinson	Alfred University	A Comprehensive Multi-wavelength Study of the Accretion Variability of GM Aur	6
27	16009	David Jewitt	University of California - Los Angeles	Interstellar Object C/2019 Q4	7
27	15929	Amy Simon	NASA Goddard Space Flight Center	Hubble 2020: Outer Planet Atmospheres Legacy (OPAL) Program	50
26	16004	Tuan Do	University of California - Los Angeles	Monitoring the Unprecendented Near-Infrared Variability of Sgr A*	12
26	15987	Arianna Miraval Zanon	Agenzia Spaziale Italiana (ASI) Science Data Center (ASDC)	Searching for NUV pulses of SAX J1808.4-3658 during its 2019 outburst	1
26	15986	Max Mutchler	Space Telescope Science Institute	WFC3 mosaic of NGC 2020 and NGC 2014	36
26	15984	Noel Castro Segura	University of Warwick	Time-resolved UV spectroscopy of the accretion disk and wind in a super-Eddington black-hole X-ray transient	3
26	15756	Norman Grogin	Space Telescope Science Institute	Interacting Systems SNAP multi-filter follow-up	1
26	15710	Paul Cauley	University of Colorado at Boulder	Simultaneous Lyman-alpha and He I 10830 angstrom observations of HD 189733 b	5
26	15686	Or Graur	University of Portsmouth	A near-IR spectrum of the old Type Ia SN 2017erp	1
26	15685	Andrew Vanderburg	Harvard University	HST Confirmation of a Candidate Earth Analogue from the Kepler Primary Mission	21
26	15684	Andrew Levan	Radboud University Nijmegen	The progenitor and physics of the first TeV gamma-ray burst	5
26	15679	Tzu-Yu Hung	University of California - Santa Cruz	Searching for Outflow Signatures in the Tidal Disruption Event ZTF18abxftqm	3
26	15678	Karen Meech	University of Hawaii	Comet or break-up? The physical nature of Gault's dust trail	3
26	15677	Max Mutchler	Space Telescope Science Institute	Spectroscopy and Imaging of the Southern Crab Nebula	13
26	15674	Allison Youngblood	NASA Goddard Space Flight Center	UV transmission spectrum of Earth as an exoplanet: the ozone signature	3
26	15623	Jessica Agarwal	Technische Universitat Braunschweig	The Hill sphere of new active asteroid P/2018 P3 at high resolution	3
26	15502	Amy Simon	NASA Goddard Space Flight Center	Hubble 2020: Outer Planet Atmospheres Legacy (OPAL) Program	51
25	15622	Keith Noll	NASA Goddard Space Flight Center	Confirmation of a Binary Companion to 21900 Orus	6
25	15604	Chelsea MacLeod	Smithsonian Institution Astrophysical Observatory	Catching an AGN in the Act: A New Accretion Regime for 1ES 1927+654	2
25	15600	Ryan Foley	University of California - Santa Cruz	Seeing The Cow in Ultraviolet Light	3
25	15599	Christian Knigge	University of Southampton	Catching the Soft State of the Black Hole Transient MAXI J1820+070f	3
25	15598	Joshua Kammer	Southwest Research Institute	Probing the Hill Sphere of 2014 MU69	1
25	15597	Max Mutchler	Space Telescope Science Institute	Infrared imaging of stellar shading in Serpens Nebula EC 82	3
25	15596	Nathan Smith	University of Arizona	Directors Discretionary observations of shock excitation around Eta Carinae with WFC3	1
25	15595	Dolon Bhattacharyya	University of Colorado at Boulder	Global Dust Storm Effects on Martian Atmospheric Escape	9
25	15489	Robert Quimby	San Diego State University	FUV Spectral Evolution of a Superluminous Supernova	4
25	15488	Peter Blanchard	Harvard University	UV Spectroscopy of the Nearby Superluminous Supernova SN2018bsz	3
25	15487	Ralph Bohlin	Space Telescope Science Institute	Standard Stars for the JWST Mission and CALSPEC Legacy	2
25	15456	Max Mutchler	Space Telescope Science Institute	Mars at opposition 2018	1
25	15455	David Bennett	University of Maryland	Mass Measurements of Exoplanet Microlens Host Stars with Near Simultaneous Hubble and Keck AO Observations	5
25	15454	Christian Knigge	University of Southampton	Ultraviolet Spectroscopy of the Black Hole Transient MAXI J1820+070	10
25	15453	Xiaohui Fan	University of Arizona	The Most Distant Gravitationally Lensed Quasar at z=6.5	2
25	15450	Marc Buie	Southwest Research Institute	New Horizons support observations for 2014MU69 encounterWFC3WFCa	2
25	15449	Max Mutchler	Space Telescope Science Institute	Optical and infrared imaging of the Lagoon Nebula (M8)	16
25	15448	Marianne Vestergaard	University of Copenhagen, Niels Bohr Institute	Constraining the emergent EUV ionizing emission in the reawakening monster in Mrk 590	2
25	15447	Karen Meech	University of Hawaii	Which way home? Finding the origin of our Solar System's first interstellar visitor (Part II)cd	4
25	15409	David Jewitt	University of California - Los Angeles	Characterization of Distant Comet C/2017 K2 - One-orbit DD	1
25	15407	Melissa Graham	University of Washington	NUV Monitoring of a SNIa with Late-Onset CSM Interaction	5
25	15406	Karen Meech	University of Hawaii	Cause and characteristics of the major outburst of comet C/2017 O1 (ASASSN)	3
25	15405	Karen Meech	University of Hawaii	Which way home? Finding the origin of our Solar System's first interstellar visitor	5
25	15404	Marianne Vestergaard	University of Copenhagen, Niels Bohr Institute	Catching the onset of black hole activity in nearby galaxy Mrk 590	3
25	15403	Cristina Pallanca	Universita di Bologna	Unmask the true identity of MAXI J1749-200 before Halloween	2
25	15396	Paul Strom	University of Warwick	Observing the beta Pic Hill Sphere Transit in the far-UV	6
25	15382	Matt Nicholl	Queen's University Belfast	UV Spectroscopy of GRB170817A	1
25	15380	Laurent Lamy	CNRS, Laboratoire d'Astrophysique de Marseille	Hunting the successive auroral response of Uranus and Neptune to unexpected powerful heliospheric disturbances	8
25	15262	Amy Simon	NASA Goddard Space Flight Center	Hubble 2020: Outer Planet Atmospheres Legacy (OPAL) Program	42
24	15379	Amanda Hendrix	Planetary Science Institute	Characterizing Enigmatic Phaethon in the UV	2
24	15371	John MacKenty	Space Telescope Science Institute	Jupiter stray light background measurements for future Europa STIS observations	3
24	15003	Joshua Kammer	Southwest Research Institute	Stellar Occultation by 2014 MU69	2
24	14939	David Jewitt	University of California - Los Angeles	Extraordinary Comet C2017 K2	1
24	14934	Juan Hernandez Santisteban	University of St Andrews	Characterising the global accretion inflow variability for PSR J1023+0038	4
24	14933	Nathalie Degenaar	Universiteit van Amsterdam	The accretion flow and evolutionary history of an intriguing short-period black hole X-ray binary	4
24	14932	George Pavlov	The Pennsylvania State University	Optical counterpart of high-speed ejecta from the gamma-ray binary LS 2883	4
24	14931	Lotfi Ben-Jaffel	CNRS, Institut d'Astrophysique de Paris	Energy balance in Saturn's upper atmosphere: Joint Lyman-alpha airglow observations with HST and Cassini	10
24	14930	William Sparks	SETI Institute	Coordinated HST and SOFIA observations of Europa's plumes	2
24	14927	Renyu Hu	The Pennsylvania State University	First Transmission Spectrum of a Cold, Water-Cloud Gas Giant Planet	6
24	14926	Marc Buie	Southwest Research Institute	Astrometry of occultation stars for 2014MU69, New Horizons extended mission target	3
24	14925	Ryan Foley	University of California - Santa Cruz	4 For 1: UV Spectroscopy of a Young, Nearby SN Ia, Cepheid Distances to 2 SN Ia, and Extremely Late-time Photometry of Another SN Ia	4
24	14913	Max Mutchler	Space Telescope Science Institute	WFC3 imaging of galaxy pair NGC 4298 and NGC 4302	14
24	14904	Max Mutchler	Space Telescope Science Institute	Supernova 1987A after 30 years	1
24	14903	Lorenz Roth	Royal Institute of Technology	Detection methods for water vapor in Europa's plumes.	2
24	14902	Peter Blanchard	Harvard University	Imaging and UV Spectroscopy of the Luminous and Unique Nuclear Transient PS16dtm	1
24	14901	Andrew Levan	Radboud University Nijmegen	The UV behaviour of GRB 161219B/SN2016jca	1
24	14900	Julien de Wit	Massachusetts Institute of Technology	Confirming the Presence of an Hydrogen Exosphere around the Earth-sized Temperate Planet TRAPPIST-1c	5
24	14899	Chris D'Andrea	University of Pennsylvania	DES16C2nm: Is the Highest-Redshift Supernova to Date also the Most Luminous?	1
24	14873	Julien de Wit	Massachusetts Institute of Technology	Exploratory observations of the TRAPPIST-1 system: essential prelude to an immediate JWST follow-up	23
24	14872	Patrick Kelly	University of Minnesota - Twin Cities	A Hidden Potential Counterimage of a Highly Magnified Star at Redshift z=1.49	6
24	14864	Jessica Agarwal	Technische Universitat Braunschweig	Tracing rotational fission in the first known active binary asteroid system 288P/300163	3
24	14862	Ariel Goobar	Stockholm University	Resolving the multiple images of the strongly lensed SNIa iPTF16geu	11
24	14860	Christian Schneider	Christian-Albrechts Universitat zu Kiel	The most detailed high-energy picture of Proxima Centauri, our nearest extrasolar neighbor	5
24	14756	Amy Simon	NASA Goddard Space Flight Center	Hubble 2020: Outer Planet Atmospheres Legacy (OPAL) Program	29
23	14814	Shriharsh Tendulkar	Tata Institute of Fundamental Research, Bombay	Searching the IR counterpart of the mysterious central object in RCW 103	2
23	14528	Patrick Kelly	University of Minnesota - Twin Cities	Caustic Crossing of a Strongly Lensed Massive Star	5
23	14524	Javier Licandro	Instituto de Astrofisica de Canarias	WFC3 imaging of active asteroid P/2016 G1	2
23	14516	Robert Quimby	San Diego State University	UV Spectroscopy of the Superluminous Supernova Gaia16apd	5
23	14502	Andrew Levan	Radboud University Nijmegen	The IR counterpart and proper motion of SGR 1935+2154	1
23	14501	Hyosun Kim	Korea Astronomy and Space Science Institute (KASI)	Confirming the wide binary companion of IRC+10216	1
23	14500	Julien de Wit	Massachusetts Institute of Technology	Two Birds One Stone: Simultaneous Atmospheric Pre-Screening of Two Temperate Earth-Sized Exoplanets During Their Double Transit	4
23	14499	Zolt Levay	Space Telescope Science Institute	Hubble Heritage imaging of Mars opposition 2016	1
23	14487	Ben Sugerman	Space Science Institute	Light Echoes and the Progenitor of SN 2016adj in Cen A	4
23	14486	Bernd Husemann	Max Planck Institute for Astronomy	Catching a Changing Look Quasar as it retreats to the Shadows for the Second Time	2
23	14485	Marc Buie	Southwest Research Institute	Astrometry of 2014MU69	2
23	14484	Kenneth Chambers	University of Hawaii	PS15dpn - a very unusual transient discovered by Pan-STARRS.	2
23	14475	Michal Drahus	Uniwersytet Jagiellonski	HST Investigation of a Candidate Ultra-Young Rotational Asteroid Family Harboring a Doubly-Synchronous Binary	4
23	14474	David Jewitt	University of California - Los Angeles	Comet P/2010 V1 fragmentation event	7
23	14471	Zolt Levay	Space Telescope Science Institute	Hubble Heritage 2016	12
23	14450	Peter Brown	Texas A & M University	Ultraviolet Spectroscopy of the Unprecedented Rebrightening of the Most Luminous Supernova	2
23	14449	N.P.M Kuin	Mullard Space Science Laboratory	Mid-Cycle: High res UV spectrum from galactic nova V5668 Sgr post dust formation	1
23	14448	Kailash Sahu	Eureka Scientific Inc.	Accurate Mass Determination of the Nearby Old White Dwarf Stein 2051B through Astrometric Microlensing	1
23	14346	Chris Kochanek	The Ohio State University	Constraining the Position of the Most Luminous Supernova Ever Foundb	2
23	14334	Amy Simon	NASA Goddard Space Flight Center	Hubble 2020: Outer Planet Atmospheres Legacy (OPAL) Program	29
23	14056	Zolt Levay	Space Telescope Science Institute	Veil Nebula mosaic	18
23	14038	Jennifer Lotz	Space Telescope Science Institute	HST Frontier Fields - Observations of Abell 370	140
23	14037	Jennifer Lotz	Space Telescope Science Institute	HST Frontier Fields - Observations of Abell S1063	140
22	14348	Yi Yang	Tsinghua University	Polarimetry of ASASSN-15lh as a probe of explosion physics of the most luminous supernova ever discovered	7
22	14065	Christian Knigge	University of Southampton	Ultraviolet Spectroscopy of the Black Hole Transient V404 Cygni in Outburst	14
22	14064	Agustin Sanchez-Lavega	Universidad del Pais Vasco	A New Disturbance in Saturn's North Sub-Polar Region	3
22	14061	Francesco Ferraro	Universita di Bologna	Exploring the MSP prenatal stage: the optical identification of a NS burster in Terzan 5.	2
22	14058	Karen Leighly	University of Oklahoma Norman Campus	Using the WPVS 007 Occultation Event to Constrain the Astrophysics of Quasar Outflows	2
22	14055	Andrew Levan	Radboud University Nijmegen	HST NIR observations of the currently active magnetar SGR 1935+2154	2
22	14053	John Spencer	Southwest Research Institute	Astrometric Follow-Up of Kuiper Belt Objects for the New Horizons Mission	3
22	14043	Franz Bauer	Space Science Institute	HST Follow-up of a Fast Unexplained X-ray Transient in the CDF-S	1
22	14042	Zolt Levay	Space Telescope Science Institute	Hubble observations of a triple transit of Jupiter's Galilean Satellites	1
22	14041	Patrick Kelly	University of Minnesota - Twin Cities	Classifying and Following a Strongly Lensed Likely Supernova with Multiple Images	34
22	14040	David Jewitt	University of California - Los Angeles	Unique Hubble Investigation of a Newly Discovered Main Belt Comet	6
22	14039	Zolt Levay	Space Telescope Science Institute	Broad-band imaging of Westerlund 2	8
22	14036	Laurent Lamy	CNRS, Laboratoire d'Astrophysique de Marseille	Post-equinox Uranus aurorae during a strong magnetosphere-solar wind shock interaction	7
22	13937	Amy Simon	NASA Goddard Space Flight Center	Hubble 2020: Outer Planet Atmospheres Legacy (OPAL) Program	29
22	13926	Zolt Levay	Space Telescope Science Institute	Hubble Heritage Observations of LBN 67	20
22	13504	Jennifer Lotz	Space Telescope Science Institute	HST Frontier Fields - Observations of MACSJ1149.5+2223	140
22	13498	Jennifer Lotz	Space Telescope Science Institute	HST Frontier Fields - Observations of MACSJ0717.5+3745	140
21	13936	Zolt Levay	Space Telescope Science Institute	Hubble Heritage imaging of Mars during the Comet Siding Spring encounter	1
21	13935	Howard Bond	The Pennsylvania State University	The Nature of SPIRITS Intermediate-Luminosity Mid-IR Transients	2
21	13927	Brice-Olivier Demory	University of Bern	Confirming the transit of the Earth-mass planet orbiting Alpha Centauri B	9
21	13632	John Clarke	Boston University	Seasonal Dependence of the Escape of Martian Water	3
21	13631	Amy Simon	NASA Goddard Space Flight Center	Dynamical Change in Jupiter's Great Red Spot	2
21	13630	Christian Knigge	University of Southampton	Time-Resolved Ultraviolet Spectroscopy of the Missing Link Pulsar/LMXB PSR J1023	8
21	13628	Frederic Vincent	LATMOS	Lyman-alpha observations of the interplanetary hydrogen: support of a NASA sounding rocket program and study of the local interstellar medium	1
21	13626	Stephen Lawrence	Hofstra University	Light Echoes and Environment of SN 2014J in M82	6
21	13623	Zolt Levay	Space Telescope Science Institute	Hubble Heritage observations of NGC 2174 for HST 24th anniversary	8
21	13621	Ariel Goobar	Stockholm University	The closest reddened Type Ia supernova in the HST life time	7
21	13620	William Sparks	SETI Institute	Probing the atmosphere of a transiting ocean world: are there ice fountains on Europa?	9
21	13619	Lorenz Roth	Royal Institute of Technology	Confirmation of Europa's water vapor plume activity	10
21	13612	David Jewitt	University of California - Los Angeles	Hubble Investigation of the First Known, Multi-Fragment Main Belt Comet: P/2013 R3	5
21	13611	Nial Tanvir	University of Leicester	The nature of the low redshift ultra-long GRB130925A: core collapse or tidal disruption?	6
21	13610	Jian-Yang Li	Sun Yat-Sen University	Imaging Comet C/2013 A1 {Siding Spring} to Support Risk Assessment for Mars Orbiters during the Close Mars Encounter	4
21	13609	David Jewitt	University of California - Los Angeles	Investigating the Trigger Mechanism for Newly Discovered Main Belt Comet P/2013 P5	7
21	13505	Dan Milisavljevic	Purdue University	SN 2012im/2013ek: A Supernova Double Take in NGC 6984	2
21	13496	Jennifer Lotz	Space Telescope Science Institute	HST Frontier Fields - Observations of MACSJ0416.1-2403	140
21	13495	Jennifer Lotz	Space Telescope Science Institute	HST Frontier Fields - Observations of Abell 2744	140
20	13502	Steven Chesley	Jet Propulsion Laboratory	Search for the Binary Companion of Deep Impact Target 2002 GT	2
20	13501	Heather Knutson	California Institute of Technology	Characterizing the Atmosphere of Benchmark Super-Earth HD 97658b	10
20	13497	Nial Tanvir	University of Leicester	A smoking gun for a neutron star merger in a short GRB?	4
20	13230	Andrew Levan	Radboud University Nijmegen	A supernova in the brightest gamma-ray burst	4
20	13229	Zolt Levay	Space Telescope Science Institute	Hubble Heritage imaging of Comet ISON	6
20	13199	Dean Hines	Space Telescope Science Institute	Imaging Polarimetry of the 2013 Comet ISON with ACS: A Pre-Perihelion Study of the Heterogeneous Coma	2
20	13198	Jian-Yang Li	Sun Yat-Sen University	The First Pre-Perihelion Nucleus Size Measurement of a Sungrazing Comet, C/2012 S1 {ISON}	3
20	13197	Michael A'Hearn	University of Maryland	Distant Activity of Comet ISON	5
20	13196	Andrea De Luca	INAF - IASF Milano	The dynamical aftermath of a major gamma-ray flare from the Crab nebula	1
20	13185	Bradley Peterson	The Ohio State University	Mrk590: A Disappearing AGN?	1
20	13183	Frederic Vincent	LATMOS	Monitoring the velocity of the interplanetary hydrogen	1
20	13181	Robert Kirshner	Harvard University	SN 1987A-- Bridging the Gap for HST's Legacy	1
20	13180	David Ehrenreich	University of Geneva, Department of Astronomy	Search for a Transit of Alpha Centauri Bb, the First Earth-mass Exoplanet Orbiting a Sun-like Star	20
20	13179	Robert Kirshner	Harvard University	Ultraviolet Spectra of the Exceptional SN 2009ip	4
19	13120	Steven Shore	Universita di Pisa	STIS Observations of the Galactic nova Mon 2012: a new type of > 100 MeV gamma ray emitter	1
19	13118	Michael Nolan	University of Arizona	Lightcurve observations of OSIRIS-REx Sample-Return Mission target 1999 RQ36	10
19	13102	Michael McDonald	Massachusetts Institute of Technology	Zooming in on the Starburst at the Core of the Phoenix Cluster	2
19	13067	Glenn Schneider	University of Arizona	The Jovian Transit of Venus - A 'Truth Test' for Atmospheric Characterization of Earth-Size Planets in Habitable Zones	15
19	13065	Stefi Baum	University of Manitoba	Imaging the Host Galaxy and Cluster of Hercules A	3
19	13064	David Ehrenreich	University of Geneva, Department of Astronomy	Investigating the nature of GJ 3470b, the missing link between super-Earths and Neptunes	5
19	12813	Brian Schmidt	Australian National University	Network of 13 high precision STIS spectrophotometric standards for ground based surveys	15
19	12812	Zolt Levay	Space Telescope Science Institute	Hubble Heritage	19
19	12801	Hal Weaver	The Johns Hopkins University Applied Physics Laboratory	Hubble Deep Search for Debris and Satellites in the Pluto System in Support of NASA's New Horizons Mission	34
19	12800	Frederic Vincent	LATMOS	Velocity measurement of the interplanetary hydrogen	1
19	12799	Edward Sion	Villanova University	The Unique Recurrent Nova T Pyxidis: The Transition to Quiescence	3
19	12792	Matthew Knight	United States Naval Academy	High Spatial Resolution Photometric Imaging of the Area Around the Nucleus of C/2011 W3 Lovejoy	1
19	12786	Andrew Levan	Radboud University Nijmegen	Searching for the nature of the ultra-long transient GRB 111209A	4
19	12785	Roberta Humphreys	University of Minnesota - Twin Cities	The Strange Supernova or Supernova Impostor SN2011ht	1
18	12725	Hal Weaver	The Johns Hopkins University Applied Physics Laboratory	A Deep Search for Satellites in the Pluto System: Providing Critical, Safety-of-Flight Support to NASA's New Horizons Mission	6
18	12686	Stephen Cenko	NASA Goddard Space Flight Center	Sw J2058+05: A Possible Second Relativistic Tidal Disruption Flare	2
18	12683	P. Winkler	Middlebury College	Estimating the Black Hole Mass in the New UltraLuminous X-ray Source in M83	2
18	12681	David Ehrenreich	University of Geneva, Department of Astronomy	Search for a photodissociated evaporating ocean on the super-Earth 55 Cancri e	8
18	12679	Adam Riess	The Johns Hopkins University	Luminosity-Distance Standards from Gaia and HST	6
18	12675	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage: 1, 000, 000th Science Exposure and Neptune's First Orbit	7
18	12448	Arlin Crotts	Columbia University in the City of New York	Towards a Detailed Understanding of T Pyx, Its Outbursts and Shell	27
18	12447	Andrew Fruchter	Space Telescope Science Institute	The Nature of the Remarkable Transient GRB 110328A	3
18	12446	Michael Shara	American Museum of Natural History	Ionization and Light Echoes in the T Pyxidis Nebula	7
18	12441	Edmund Nelan	Space Telescope Science Institute	FGS Science During NSSC-1 Flight Software Upgrade	5
18	12438	Nial Tanvir	University of Leicester	HST observations of the exceptional Christmas-day gamma-ray burst	1
18	12437	Alex Filippenko	University of California - Berkeley	An Unusual Outburst from the Nucleus of the Quiescent Galaxy NGC 1589	3
18	12436	Mark Showalter	SETI Institute	New Horizons Mission Planning Support: A Deep Search for Faint Rings of Pluto	5
18	12435	David Jewitt	University of California - Los Angeles	Investigating the Outburst of Asteroid 596 Scheila: Main Belt Comet vs Collisional Origin	2
18	12434	Andrei Lobanov	Max Planck Institut fur Radioastronomie	Deciphering the Flare in the Crab Nebula:	1
18	12381	Patrizia Caraveo	INAF - IASF Milano	Imaging the Crab nebula while it is flaring in gamma-rays	1
18	12360	Saul Perlmutter	University of California - Berkeley	Cosmology From Cluster-Hosted and z>1 Supernovae Orphaned from the MCT Program	12
18	12326	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage 2.0	18
17	12119	Amy Simon	NASA Goddard Space Flight Center	Rapid Response: Unexpected Jupiter Impact	1
17	12118	Mansi Kasliwal	California Institute of Technology	PTF10fqs: A Luminous Red Nova in the Spiral Messier 99	1
17	12117	Andrew Drake	California Institute of Technology	Determining the Nature of an Exceptional Optical Transient	1
17	12077	David Jewitt	University of California - Los Angeles	Monitoring the Aftermath of an Asteroid Impact Event	6
17	12053	David Jewitt	University of California - Los Angeles	Hubble Investigation of the Unusual Object P/2010 A2	3
17	12051	Saul Perlmutter	University of California - Berkeley	Cross Calibration of NICMOS and WFC3 in the Low-Count-Rate Regime	9
17	12050	Mario Livio	Space Telescope Science Institute	20th Anniversary of HST Launch	24
17	12049	Jian-Yang Li	Sun Yat-Sen University	Improve the Measurement of Vesta's Pole Orientation to Support Dawn Mission	7
17	12045	Heidi Hammel	Space Science Institute	Evolution of the 2009 Single Impact on Jupiter	4
17	12044	Peter Eisenhardt	Jet Propulsion Laboratory	DD Observations of the Coldest Brown Dwarf	7
17	12007	Garth Illingworth	University of California - Santa Cruz	Supernova Followup	1
17	12005	Hsiao-Wen Chen	University of Chicago	Unveiling the Dusty Starburst Galaxy Hosting GRB080607	4
17	12004	Darin Ragozzine	Brigham Young University	The Last Mutual Event between the Satellites of Dwarf Planet Haumea	7
17	12003	Heidi Hammel	Space Science Institute	The Impact Event on Jupiter in 2009	5
17	11998	Karen Meech	University of Hawaii	Determining the Rotational Phase of Comet 9P/Tempel 1 in Support of the StardustNExT Mission	19
17	11817	David Ehrenreich	University of Geneva, Department of Astronomy	Detecting the upper atmosphere of a transiting hot Neptune: A feasibility study	1
17	11806	Anthony Colaprete	NASA Ames Research Center	Coordinated Observations of LCROSS Impacts	7
17	11360	Robert O'Connell	The University of Virginia	Star Formation in Nearby Galaxies	110
17	11359	Robert O'Connell	The University of Virginia	Panchromatic WFC3 survey of galaxies at intermediate z: Early Release Science program for Wide Field Camera 3.	104
16	12000	Geoffrey Clayton	Space Science Institute	The Natural Coronagraph of R Coronae Borealis	1
16	11994	Mario Livio	Space Telescope Science Institute	HST Participation in the IYA 100 Hours of Astronomy	8
16	11993	Tod Lauer	NOIRLab - (AZ)	High Resolution Imaging of a Binary Supermassive Black Hole Candidate	1
16	11991	Andrew Levan	Radboud University Nijmegen	Constraining the late time lightcurve and energy of GRB 090102	6
16	11990	Karen Meech	University of Hawaii	Determining the Physical Properties of Comet 103P/Hartley 2 in Support of NASA's EPOXI Mission	12
16	11989	Keith Noll	NASA Goddard Space Flight Center	The Integral Sign Galaxy	12
16	11987	Michael Regan	Space Telescope Science Institute	The Recent Star Formation History of SINGS Galaxies	98
16	11973	Robert Kirshner	Harvard University	SAINTS - Supernova 1987A INTensive Survey	5
16	11971	Darin Ragozzine	Brigham Young University	A Rare Mutual Event between Satellites of the Dwarf Planet Haumea	5
16	11969	Jian-Yang Li	Sun Yat-Sen University	Satellite Search for Dawn Mission Targets, Vesta and Ceres	4
16	11968	Howard Bond	The Pennsylvania State University	The Light Echoes around V838 Monocerotis: Cycle 16 DD	14
16	11967	Rachel Somerville	Simons Foundation Center for Computational Astrophysics	WFPC2 Imaging of the Lockman Hole	125
16	11962	Adam Riess	The Johns Hopkins University	A New Supernova in the Antennae; Narrowing in on the Hubble Constant and Dark Energy	34
16	11957	Hal Weaver	The Johns Hopkins University Applied Physics Laboratory	Hubble Investigation of Asteroid 21 Lutetia in Support of the Rosetta Mission Flyby	7
16	11956	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage: Side B	36
16	11945	Ronald Gilliland	The Pennsylvania State University	Asteroseismology of Extrasolar Planet Host Stars	190
16	11944	Douglas Gies	Georgia State University Research Foundation	Binaries at the Extremes of the H-R Diagram	168
16	11943	Douglas Gies	Georgia State University Research Foundation	Binaries at the Extremes of the H-R Diagram	140
16	11942	George Benedict	University of Texas at Austin	Increasing the Accuracy of HST Astrometry with FGS1r	54
16	11902	Mario Livio	Space Telescope Science Institute	Different responses in interacting galaxies	10
16	11867	John Trauger	Jet Propulsion Laboratory	HH 30	4
16	11827	Keith Noll	NASA Goddard Space Flight Center	Observations of NGC2438	3
16	11818	Paul Kalas	University of California - Berkeley	NICMOS confirmation of an extrasolar planet candidate directly detected with ACS	18
16	11807	Mario Livio	Space Telescope Science Institute	Hubble WFPC2 imaging of NGC 2074 in the Large Magellanic Cloud	3
16	11800	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage imaging of NGC 3324 in the Carina Nebula	6
16	11799	Saul Perlmutter	University of California - Berkeley	NICMOS non-linearity calibration for faint objects	15
16	11553	Howard Bond	The Pennsylvania State University	HST Imaging of the Luminous Transient in NGC 300	2
16	11551	Joshua Bloom	University of California - Berkeley	When degenerate stars collide: Understanding A New Explosion Phenomena	12
16	11518	Michael Brown	California Institute of Technology	Mutual eclipses of a Kuiper belt-satellite system	5
16	11517	Peter Jonker	Radboud University Nijmegen	A >10000 solar mass black hole	1
16	11513	Nial Tanvir	University of Leicester	The afterglow and host galaxy of GRB 080319: the first naked eye burst	12
16	11512	Mark Swain	Jet Propulsion Laboratory	Molecules in Exoplanet Atmospheres	15
16	11498	Amy Simon	NASA Goddard Space Flight Center	2008 Passage of Jupiter's Great Red Spot and Oval BA	7
16	11497	Keith Noll	NASA Goddard Space Flight Center	Observations of Mars and 2007 WD5	6
16	11495	Carole Haswell	Open University	The first direct detection of an extrasolar planetary stratosphere?	20
16	11418	Hal Weaver	The Johns Hopkins University Applied Physics Laboratory	Investigating the Spectacular Outburst of Comet 17P/Holmes	3
16	11352	Andrew Gould	The Ohio State University	Mass and distance of the sub-Saturn microlensing planet OGLE-2007-BLG-349Lb	5
16	11329	Adam Riess	The Johns Hopkins University	The Final SHOE; Completing a Rich Cepheid Field in NGC 1309	5
15	11314	Philip James	Space Science Institute	Calibration of MARCI UV using WFPC2	2
15	11312	Graham Smith	University of Birmingham	The Local Cluster Substructure Survey {LoCuSS}: Deep Strong Lensing Observations with WFPC2	20
15	11311	Kailash Sahu	Eureka Scientific Inc.	The high-amplification microlensing event OGLE-2007-BLG-224: a substellar lens in the Galactic disk or a low-mass stellar lens in the halo?	4
15	11310	Agustin Sanchez-Lavega	Universidad del Pais Vasco	Jupiter's North Temperate Belt Disturbance	4
15	11309	Jacob Bean	University of Chicago	Chemical Composition of an Exo-Neptune	6
15	11308	Orsola De Marco	Macquarie University	Planetary Nebulae, Globular Clusters, and Binary Mergers	1
15	11307	Julianne Dalcanton	University of Washington	Completing the ACS Nearby Galaxy Survey with WFPC2	25
15	11098	Andrew Levan	Radboud University Nijmegen	Pinning down the redshift of the J-band dropout JD0910+46	8
15	11096	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage imaging of Jupiter during the New Horizons encounter	20
15	11095	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of NGC 6050	10
15	11093	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of PNe with WFPC2	13
15	11092	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of Arp 87	10
15	11091	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of Arp 148	10
15	11090	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of PNe with WFPC2	19
15	11085	William Sparks	SETI Institute	Europa in Eclipse: Tenuous Atmosphere, Electromagnetic Activity and Surface Luminescence	7
15	11083	Patrick Cote	National Research Council of Canada	The Structure, Formation and Evolution of Galactic Cores and Nuclei	199
15	11079	Luciana Bianchi	The Johns Hopkins University	Treasury Imaging of Star Forming Regions in the Local Group: Complementing the GALEX and NOAO Surveys	134
15	11075	Michael Bode	Liverpool John Moores University	The 2006 outburst of RS Oph - Second epoch HST observations of evolving structures	3
15	11072	Carole Haswell	Open University	Measuring the Physical Properties of the first two WASP transiting extrasolar planets	16
15	11017	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of SN1006	2
14	11004	Michael Bode	Liverpool John Moores University	The 2006 outburst of RS Oph - A rapidly evolving SNR analogue with jets	1
14	10992	Hal Weaver	The Johns Hopkins University Applied Physics Laboratory	Investigating the Disintegration of Comet 73P/Schwassmann-Wachmann 3	5
14	10991	Arlin Crotts	Columbia University in the City of New York	Light Echoes from SN 2006X in M100	3
14	10783	Amy Simon	NASA Goddard Space Flight Center	Rapid Response: Jupiter's White Oval Turns Red	1
14	10782	Imke de Pater	University of California - Berkeley	Quit winking: Jupiter opens its other eye	6
14	10781	Young-Jun Choi	Korea Astronomy and Space Science Institute (KASI)	Observations of the active Centaur {60558} 2000 EC98	10
14	10780	Andrew Fruchter	Space Telescope Science Institute	The Unusual Afterglow and Host Galaxy of the Short GRB 060121	8
14	10776	Matt Mountain	Space Telescope Science Institute	HST/ACS Mosaic of M82	24
14	10774	Hal Weaver	The Johns Hopkins University Applied Physics Laboratory	Confirming the Discovery of Two New Satellites of Pluto	2
14	10770	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of Mars at 2005 Opposition and Closest Approach.	2
14	10759	Michael Brown	California Institute of Technology	Direct measurement of the size of 2003 UB313	2
14	10718	Jeff Valenti	Space Telescope Science Institute	The Exosphere of a Newly Discovered Transiting Planet	18
14	10715	Massimo Capaccioli	Osservatorio Astronomico di Capodimonte (OAC)	CSL-1: a peculiar gravitational lens and possible cosmic string	6
14	10713	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of NGC 281	3
14	10711	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of NGC1309	4
14	10710	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of ESO 325-G004	4
14	10705	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of NGC 5866	4
14	10700	Paul Feldman	The Johns Hopkins University	Guide Star Test for the Deep Impact Encounter	1
13	10707	Andrew Gould	The Ohio State University	First Mass Measurement of a Planet Found By Microlensing	2
13	10703	Harald Ebeling	University of Hawaii	Life in the fast lane: The dark-matter distribution in the most massive galaxy clusters in the Universe at z>0.5	4
13	10467	Roberto Mignani	INAF - IASF Milano	SEARCHING FOR LIGHT ECHOES AFTER THE SGR 1806-20- HYPERFLARE	2
13	10452	Steven Beckwith	University of California - Berkeley	HST/ACS Mosaic of M51	24
13	10442	C. Kouveliotou	George Washington University	Searching for an IR counterpart of the Soft Gamma Repeater SGR 1806-20	2
13	10441	Timothy Brown	University of Colorado at Boulder	Characterizing a Newly-Found Extrasolar Planet	15
13	10390	Paul Kalas	University of California - Berkeley	Serendipitous detection of a debris disk near the Sun	12
13	10358	Thomas Brown	Space Telescope Science Institute	Guide Star Test for program 10265	6
13	10357	Anne Verbiscer	The University of Virginia	Saturn's Inner Satellites at True Opposition	4
12	10393	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of Eagle Nebula	6
12	10392	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Image of the Light Echo around V838 Monocerotis	4
12	10342	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of NGC 1300	8
12	10341	Hal Weaver	The Johns Hopkins University Applied Physics Laboratory	The D/H Ratio in C/2002 T7 {LINEAR}	8
12	10095	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of Deep Impact Target Comet Tempel-1	2
12	10091	Margarita Karovska	Smithsonian Institution Astrophysical Observatory	Soft X-ray Transient in Mira AB	4
12	10089	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Image of the Light Echo around V838 Monocerotis	3
12	10086	Steven Beckwith	University of California - Berkeley	The Ultra Deep Field with ACS	1
12	10083	John Clarke	Boston University	HST UV Images of Saturn's Aurora Coordinated with Cassini Solar Wind Measurements	17
12	10081	Alfred Vidal-Madjar	CNRS, Institut d'Astrophysique de Paris	Is the exoplanet HD209458b's exosphere in a blowoff state ?	12
12	10065	James Bell	Arizona State University	Mars at Closest Approach	2
12	10041	Michael Brown	California Institute of Technology	Characterization of a planetary-sized body in the inner Oort cloud	2
12	9992	Robert Kirshner	Harvard University	Essential Observations of SN 1987A	3
12	9981	Steven Beckwith	University of California - Berkeley	The Ultra Deep Field - STIS parallels	400
12	9980	Steven Beckwith	University of California - Berkeley	The Ultra Deep Field - WFPC2 Parallels	400
12	9979	Steven Beckwith	University of California - Berkeley	The Ultra Deep Field - NICMOS Parallels	400
12	9978	Steven Beckwith	University of California - Berkeley	The Ultra Deep Field with ACS	400
12	9845	Michael Liu	University of Hawaii	NICMOS Confirmation of a Young Planetary-Mass Companion	6
11	9991	Keith Noll	NASA Goddard Space Flight Center	The Orbit of a Newly Discovered Transneptunian Binary	4
11	9983	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of Ring Galaxy AM0644-741	5
11	9982	Dieter Reimers	Universitat Hamburg	Intergalactic-Ionized Helium toward HS 1700+6416 at maximum QSO brightness	2
11	9714	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of the Sombrero Galaxy	18
11	9713	Philippe Lamy	CNRS, Laboratoire d'Astrophysique de Marseille	The Origin of Short-Period Comets	11
11	9705	Eric Perlman	Florida Institute of Technology	M87 Jet	6
11	9700	Margaret Meixner	Jet Propulsion Laboratory	2002 Leonid Observations: The Hubble Helix	9
11	9698	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of NGC 2736 {Pencil Nebula}	4
11	9696	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage observations of NGC 3370	4
11	9695	Thomas Brown	Space Telescope Science Institute	Guide Star Test for program 9453	3
11	9694	Howard Bond	The Pennsylvania State University	HST Imaging Polarimetry of the Light Echo around V838 Monocerotis. Part III.	9
11	9691	David Bennett	University of Maryland	Resolution of the Source Star for a Candidate Planetary Gravitational Microlensing Event	4
11	9678	Michael Brown	California Institute of Technology	Direct Measurement of the Size of the Largest Kuiper Belt Object	2
10	9679	Edmund Nelan	Space Telescope Science Institute	The Structure of Eta Carinae's Central Core	2
10	9646	Douglas Gies	Georgia State University Research Foundation	Wind Accretion and State Transitions in the Black Hole Binary Cyg X-1	4
10	9635	Boris Gaensicke	University of Warwick	UV Zeeman spectroscopy of AM Herculis	4
10	9632	Raghvendra Sahai	Jet Propulsion Laboratory	Measuring Proper Motions in the Very Fast Outflow of the Carbon star, V Hydra	3
10	9588	Howard Bond	The Pennsylvania State University	HST Imaging Polarimetry of the Light Echo around V838 Monocerotis. Part II.	1
10	9587	Sumner Starrfield	Arizona State University	HST Imaging Polarimetry of the Light Echo around V838 Monocerotis	2
10	9585	Keith Noll	NASA Goddard Space Flight Center	Discovery of a Binary Kuiper Belt Object by HST	3
10	9581	Edmund Nelan	Space Telescope Science Institute	A BEA Science Program: A High Angular Resolution Survey of Some of the Galaxy's Most Massive Stars	71
10	9576	Thomas Rauch	Eberhard Karls Universitat Tubingen	Establishing an observational baseline for the newly discovered peculiar variable in Monoceros	1
10	9328	Arlin Crotts	Columbia University in the City of New York	Comprehensive STIS Spectroscopy of the Supernova Remnant 1987A's Formation	6
10	9320	Christian Veillet	University of Arizona	Constraining the highly eccentric orbit of the companio of the binary TNO 1998 WW31 by observations at its pericenter	3
10	9309	Steven Beckwith	University of California - Berkeley	WFPC2 Supernova Search	30
10	9307	David Bennett	University of Maryland	Possible Resolution of Gravitationally Lensed Images Due to an Intermediate Black Hole in the Galactic Disk	2
10	9304	Edward Sion	Villanova University	Ultraviolet Spectroscopy of the Unexpected Outburst of WZ Sagittae	4
10	9287	Christian Knigge	University of Southampton	STIS Ultraviolet Observations of the Death Star in Outburst	8
9	9582	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of NGC 6369	2
9	9580	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of NGC 4319	2
9	9315	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of Gomez's Hamburger {IRAS 18059-3211}	1
9	9314	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of IC4406	2
9	9313	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of NGC 6397	1
9	9268	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of Mars at Opposition	1
9	9267	Steven Beckwith	University of California - Berkeley	WFPC2 Supernova Search	12
9	9260	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of Hoag's Object	6
9	9259	Christian Veillet	University of Arizona	Astrometry and Photometry of the binary TNO 1998 WW31	3
9	9250	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of NGC 1275	2
9	9240	Melissa McGrath	SETI Institute	Astrometric Mass Determination of an Extrasolar Planet Candidate	16
9	8888	Keith Noll	NASA Goddard Space Flight Center	Heritage Observations of ESO 510-13	6
9	8887	Keith Noll	NASA Goddard Space Flight Center	Heritage Observations of the IC 2944	1
9	8886	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of DEM 106	2
9	8876	Hal Weaver	The Johns Hopkins University Applied Physics Laboratory	Does Comet Linear Have a Nucleus?	6
9	8875	Gerard Kriss	Space Telescope Science Institute	Coordinated HST and FUSE Observations of the IGM in the QSO HE2347-4342	2
9	8872	Arlin Crotts	Columbia University in the City of New York	Spectroscopy of a New Hot spot in SN 1987A	6
9	8871	Agustin Sanchez-Lavega	Universidad del Pais Vasco	The merger of the 60-year old Jupiter's White Ovals	2
8	8809	Ethan Schreier	Associated Universities, Inc.	Imaging the Chandra Deep Field with HST	15
8	8807	Steve Howell	NASA Ames Research Center	FUV Observations of EX Hya during a Large Multi-wavelength Campaign	6
8	8806	Arlin Crotts	Columbia University in the City of New York	Spectroscopy of a New Hot spot in SN 1987A	1
8	8789	Timothy Brown	University of Colorado at Boulder	Probing the Outskirts of an Extrasolar Planet: Photometry and Spectroscopy	20
8	8554	Keith Noll	NASA Goddard Space Flight Center	Heritage observations of NGC 3314	2
8	8553	Michael Garcia	NASA Headquarters	A Bright X-ray Transient in M31	2
8	8552	Jeff Hester	Arizona State University	The Crab Synchrotron Nebula: Short Version	5
8	8550	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of NGC 6782	1
8	8548	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of NGC 1999	2
8	8546	Jeremy Drake	Lockheed Martin Space	The First Comprehensive High Spectral Resolution Study of Stellar Coronae: The 1999 Chandra, HST, EUVE, SAX and VLA Capella Campaign	3
8	8540	Howard Bond	The Pennsylvania State University	STIS UV Spectroscopy of the Bright Galactic Nova Velorum 1999	8
8	8539	Edwin Barker	University of Texas at Austin	Using the Impact of the Lunar Prospector into a South Polar Cold Trap to Detect Water Ice on the Moon	3
8	8538	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage observations of Hickson Compact Galaxy Group 87	10
7	8490	David Bennett	University of Maryland	Confirmation of a Gravitational Microlensing Black Hole Candidate	1
7	8405	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage Observations of Jupiter	1
7	8400	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage observations of NGC 4414	3
7	8399	Keith Noll	NASA Goddard Space Flight Center	Hubble Heritage observations of NGC 4650A	8
7	8394	Steven Beckwith	University of California - Berkeley	HST Service Observations of GRB 990123	3
7	8391	Philip James	Space Science Institute	Calibration of the MOC on MGS	unknown
7	8088	Saul Perlmutter	University of California - Berkeley	Cosmological Parameters Omega and Lambda from High-Z Type Ia Supernovae - DD	10
7	8086	Stefi Baum	University of Manitoba	Leonid STIS proposal	7
7	8085	Steven Beckwith	University of California - Berkeley	Imaging of High Redshift Starburst galaxies in the light of Lyman alpha	10
7	8076	Robert Williams	Space Telescope Science Institute	HDF-South Observations	32
7	8075	Robert Williams	Space Telescope Science Institute	HDF-South Observations	32
7	8074	Robert Williams	Space Telescope Science Institute	HDF-South Observations	32
7	8073	Robert Williams	Space Telescope Science Institute	HDF-South Observations	32
7	8071	Robert Williams	Space Telescope Science Institute	HDF-South Flanking Fields	29
7	8060	John Stocke	University of Colorado at Boulder	Observation of the Unusual BL Lac Object/Compact Symmetric Object PKS 1413+135	2
7	8058	Robert Williams	Space Telescope Science Institute	HDF-South Observations	36
7	8050	Rodrigo Ibata	Universite de Strasbourg I	APM 08279+5255 - An Ultraluminous BAL Quasar at z=3.87?	1
7	7967	Arjun Dey	NOIRLab - (AZ)	HST Observations of a Galaxy at z=5.34	5
7	7966	Andrew Fruchter	Space Telescope Science Institute	A Search for the Host Galaxy of GRB 970508	4
7	7964	Shrinivas Kulkarni	California Institute of Technology	The host galaxy of GRB 971214	4
7	7952	Eduardo Martin	University of Florida	Are free-floating brown dwarfs single?	2
7	7941	Garth Illingworth	University of California - Santa Cruz	NICMOS observations of Gravitationally-Magnified Galaxy	6
7	7940	Anthony Moffat	Universite de Montreal	Dust Formation in the Wolf-Rayet Star WR137: NICMOS Follow-up	1
7	7804	Felix Mirabel	Commissariat a l'Energie Atomique (CEA)	THE SUPERLUMINAL SOURCE GRS 1915+105: A RUNAWAY BLACK HOLE ?	1
7	7792	Philip James	Space Science Institute	HST SUPPORT FOR MARS GLOBAL SURVEYOR	6
7	7790	Nolan Walborn	Space Telescope Science Institute	WFPC2 Narrow-Band Imagery of the Carina Nebula (NGC3372)	4
7	7785	Andrew Fruchter	Space Telescope Science Institute	The Nature of GRB970228 and Its Surrounding Nebulosity	2
7	7714	Mauro Giavalisco	University of Massachusetts - Amherst	Observations of the Rest-Frame Optical Morphology of a Statistically Significant Sample of Normal Galaxies at Redshift z~3.	30
7	7702	Elena Pian	INAF - Osservatorio di Astrofisica e Scienza dello Spazio	Observations of a possible optical counterpart of GRB970508	3
7	7633	Robert Williams	Space Telescope Science Institute	HDF-South Test Observations	3
7	7632	Howard Bond	The Pennsylvania State University	HST HERITAGE PROGRAM	2
7	7615	Kailash Sahu	Eureka Scientific Inc.	Determination of the mass function of a globular cluster through gravitational microlensing	44
7	7594	Alex Storrs	Towson University	OBSERVATIONS OF COMET SPACEWATCH (1996 BA6)	1
7	7592	Kailash Sahu	Eureka Scientific Inc.	FOLLOW-UP OBSERVATIONS OF A POSSIBLE OPTICAL COUNTERPART OF GRB 970228	6
7	7307	Gerard Gilmore	University of Cambridge	THE FORMATION AND EVOLUTION OF RICH STAR CLUSTERS IN THE LMC	95
6	7590	Saul Perlmutter	University of California - Berkeley	COSMOLOGICAL PARAMETERS Omega AND Lambda FROM HIGH-REDSHIFT TYPE Ia SUPERNOVAE	28
6	7588	Brian Schmidt	Australian National University	Measuring q0 With Type Ia Supernovae	28
6	7209	Irwin Shapiro	Smithsonian Institution Astrophysical Observatory	HST Observation Coordinated with NASA/Stanford Gravity Probe_B {GP-B} Experiment	6
6	7207	Howard Bond	The Pennsylvania State University	SAKURAIS NOVALIKE VARIABLE IN SAGITTARIUS: EJECTA AND LIGHT ECHOES	1
6	7204	S. Stern	Southwest Research Institute	PRE-PERIHELION OBSERVATIONS OF THE INTERNATIONAL ROSETTA MISSION TARGET COMET 46P/WIRTANEN IN SUPPORT OF UV SPECTROMETER DESIGN AND	4
6	6965	Michael Shara	American Museum of Natural History	GK Per - Nova 1901	11
6	6889	Simon Rosen	University of Leicester	THE ACCRETION REGION AND ACCRETION FLOW OF QS TEL.	4
6	6886	Priscilla Frisch	University of Chicago	GHRS OBSERVATIONS OF ETA UMA	10
6	6845	David Soderblom	Space Telescope Science Institute	51 Pegasi X?	2
5	7201	Ian Smail	Durham University	Gravitational Imaging in Well-Constrained Clusters: Absolute Masses and Faint Galaxy Redshifts - Cycle 5 DD Observations	unknown
5	6846	Heidi Hammel	Space Science Institute	OBSERVATIONS OF NEPTUNE AND PLUTO FOR THE "LIVE FROM HST" TELEVISION PROGRAM	3
5	6841	Michael A'Hearn	University of Maryland	THE NUCLEUS OF COMET H-M-P	2
5	6342	Wendy Freedman	University of Chicago	The Spectrum of Background Light	unknown
5	6340	Robert Williams	Space Telescope Science Institute	THE HDF EXPERIMENTS: FLANKING FIELDS	unknown
5	6337	Robert Williams	Space Telescope Science Institute	THE HUBBLE DEEP FIELD	150
5	6324	Giovanni Bignami	Istituto Universitario di Studi Superiori	PARALLAX OF GEMINGA	3
5	6313	Robert Williams	Space Telescope Science Institute	THE HDF EXPERIMENTS: A TEST	2
5	6309	Francesco Bertola	Universita degli Studi di Padova	DETERMINING THE SED OF AN ULTRAVIOLET FLARE AT THE CENTRE OF THE ELLIPTICAL GALAXY NGC 4552	unknown
5	6248	Marco Tavani	INAF - IASF Milano	HST OBSERVATIONS OF NOVA SCORPII	2
5	6164	Lyman Spitzer	Princeton University	COMPOSITION OF GAS IN INDIVIDUAL INTERSTELLAR CLOUDS: CYCLE 5 DDT OBSERVATIONS	8
5	6156	Peter Jakobsen	University of Copenhagen, Niels Bohr Institute	IS THE INTERGALACTIC HEII ABSORPTION IN PKS 1935-692 AND Q0302-003 TRULY DIFFERENT?	unknown
4	6315	Roger Yelle	University of Arizona	THE AFTERMATH OF SL9 AND JUPITER	4
4	6145	Paul Feldman	The Johns Hopkins University	ULTRAVIOLET IMAGERY OF JOVIAN AURORA TO SUPPORT FUV SPECTROSCOPY DURING THE ASTRO-2 MISSION	2
4	6141	Roger Yelle	University of Arizona	THE AFTERMATH OF SL9 AND JUPITER	unknown
4	6139	Robert Kirshner	Harvard University	SINS: THE SUPERNOVA INTENSIVE STUDY - CYCLE4	3.5 hours
4	5776	Reta Beebe	New Mexico State University	OBSERVATIONS OF THE 1994 SPOT ON SATURN	0.6 hours
4	5761	Michael Shara	American Museum of Natural History	NARROWBAND IMAGERY OF A GAMMA RAY NOVA	2.0 hours
4	5662	Hal Weaver	The Johns Hopkins University Applied Physics Laboratory	CYCLE 4 DD HST OBSERVATIONS OF COMET SHOEMAKER-LEVY (1993E) FOR JULY 1994	10.77 hours
4	5653	Hal Weaver	The Johns Hopkins University Applied Physics Laboratory	CYCLE 4 DD HST OBSERVATIONS OF COMET SHOEMAKER-LEVY (1993E) FOR JUNE 1994	4.59 hours
4	5642	Alex Storrs	Towson University	OBSERVATIONS OF THE IMPACT OF COMET SHOEMAKER-LEVY (1993E) AND JUPITER	124.0 hours
4	5640	Hal Weaver	The Johns Hopkins University Applied Physics Laboratory	CYCLE 4 DD HST OBSERVATIONS OF COMET SHOEMAKER-LEVY (1993E) FOR MAY 1994	unknown
4	5638	Robert Williams	Space Telescope Science Institute	HIGH RESOLUTION OBSERVATIONS OF NOVA CYG 92 CYCLE 4	9.9 hours
4	5624	Hal Weaver	The Johns Hopkins University Applied Physics Laboratory	CYCLE 4 DD HST OBSERVATIONS OF COMET SHOEMAKER-LEVY (1993E) FOR MARCH 1994	6.78 hours
4	5610	Manfred Vogel	Fachhochschule Aargau	SYMBIOTIC SYSTEMS IN THE MAGELLANIC CLOUDS CYCLE 4 HIGH	4.2 hours
4	5602	Nino Panagia	Space Telescope Science Institute	STUDY OF ULTRAVIOLET ECHOES AROUND SN 1993J	6.44 hours
4	5590	Hal Weaver	The Johns Hopkins University Applied Physics Laboratory	CYCLE 4 DD HST OBSERVATIONS OF COMET SHOEMAKER-LEVY (1993E)	5.2 hours
4	5581	R. Nather	University of Texas at Austin	TIME-RESOLVED SPECTROSCOPY OF THE PULSATING DA WHITE DWARF DN DRACONIS: CYCLE4 MEDIUM	22.8 hours
4	5094	Lyman Spitzer	Princeton University	COMPOSITION OF GAS IN INDIVIDUAL INTERSTELLAR CLOUDS: CYCLE 4 OBSERVATIONS	3.39 hours
3	5255	Keith Horne	University of St Andrews	MULTIWAVELENGTH OBSERVATIONS OF THE FLARES AND OSCILLATIONS AE AQR	5.0 hours
3	5184	William Sparks	SETI Institute	CURRENT HST IMAGING OF A NEARBY SPIRAL GALAXY	3.2 hours
2	5064	Pierluigi Bernacca	Universita degli Studi di Padova	DIAGNOSTIC OF EARLY STELLAR EVOLUTION: SEARCH FOR PRE-MAIN SEQUENCE STARS AND DETERMINATION OF THEIR ABSOLUTE ORBITS-FIXED	1.0 hours
2	4806	Steven Shore	Universita di Pisa	SECOND EPOCH HIGH RESOLUTION ULTRAVIOLET SPECTROSCOPY OF NOVA CYGNI 1992 IN THE NEBULAR PHASE	6.0 hours
2	4782	Richard McCray	University of Colorado at Boulder	CONDUCTIVE INTERFACES IN STELLAR WIND BUBBLES REPEAT FOR 2492	2.0 hours
2	4748	Keith Noll	NASA Goddard Space Flight Center	DIRECT IMAGING AND SPECTROSCOPY OF NEAR-EARTH ASTEROID 4179 TOUTATIS	unknown
2	4719	Alan Dressler	Carnegie Institution for Science	MORPHOLOGY OF GALAXIES IN CLUSTERS AT Z = 0.5 - CYCLE 2 DD PROGRAM - CONT OF 2373	10.0 hours
2	4593	Giovanni Bignami	Istituto Universitario di Studi Superiori	POSITIONING OF THE GEMINGA OPTICAL COUNTERPART	2.2 hours
2	4247	Stephen Holt	NASA Goddard Space Flight Center	UV OBSERVATIONS OF GEMINGA	1.5 hours
2	4210	Bradley Peterson	The Ohio State University	INTERNATIONAL AGN WATCH: MAPPING THE BROAD-LINE REGION IN NGC 3783	2.7 hours
2	4165	Sergio Ilovaisky	Observatoire de Haute Provence	ASTROMETRY OF THE 4U1543-47 X-RAY TRANSIENT OPTICAL COUNTERPART	6.0 hours
2	3858	Beverley Wills	University of Texas at Austin	THE INNER REGIONS OF QUASARS: CYCLE 2 CONTINUATION	10.0 hours
2	3688	Pierluigi Bernacca	Universita degli Studi di Padova	DIAGNOSTIC OF EARLY STELLAR EVOLUTION: SEARCH FOR PRE-MAIN SEQUENCE STARS AND DETERMINATION OF THEIR ABSOLUTE ORBITS	5.0 hours
2	3594	F. Macchetto	Space Telescope Science Institute	IMAGING POLARIZATION OF THE M87 NUCLEUS AND JET	9.0 hours
1	4164	Keith Horne	University of St Andrews	INSTABILITIES IN ACCRETION DISCS AND THE OUTBURSTS OF DWARF NOVAE -- REPEAT FOR HOPR#57	unknown
1	4053	Steven Shore	Universita di Pisa	HIGH RESOLUTION ULTRAVIOLET SPECTROSCOPY OF NOVA CYGNI 1992 IN THE NEBULAR PHASE	3.25 hours
1	4051	Robert Antonucci	University of California - Santa Barbara	POLARIZATION AND BROAD ABSORPTION LINES IN QUASARS-REPEAT	1.4 hours
1	4005	S. Stern	Southwest Research Institute	HST UV IMAGING OF JUPITER TO SUPPORT THE INTERPRETATION OF ULYSSES XRAY MEASUREMENTS	3.6 hours
1	3992	John Bahcall	Institute For Advanced Study	GRAVITATIONAL LENS CANDIDATE 1208+101: SPECTROSCOPY	4.37 hours
1	3981	John Bahcall	Institute For Advanced Study	GRAVITATIONAL LENS CANDIDATE 1208+101: PHOTOMETRY	4.4 hours
1	3882	Claus Leitherer	Space Telescope Science Institute	ULTRAVIOLET SPECTROPOLARIMETRY OF AG CAR IN ITS CURRENT OUTBURST	3.0 hours
1	3412	Steven Shore	Universita di Pisa	HIGH RESOLUTION OBSERVATIONS OF NOVA LMC 1991	7.8 hours
1	3109	J. Westphal	California Institute of Technology	SATURN TIME LAPSE - TARGET OF OPPORTUNITY	unknown
1	3090	J. Westphal	California Institute of Technology	SATURN WHITE SPOT - TARGET OF OPPORTUNITY	23.0 hours
1	2957	S. Stern	Southwest Research Institute	HIGH RESOLUTION UV SPECTROSCOPY OF TRITON	1.8 hours
1	2955	Robert Fesen	Dartmouth College	UV IMAGING AND SPECTROSCOPY OF S ANDROMEDAE IN M31	5.0 hours
0	3381	Nino Panagia	Space Telescope Science Institute	OBSERVATIONS OF X-RAY NOVA MUSCAE 1991 - REPEAT,HOPR #0011	3.2 hours
0	3232	Nino Panagia	Space Telescope Science Institute	OBSERVATIONS OF X-RAY NOVA MUSCAE 1991	6.0 hours
0	3159	John Bahcall	Institute For Advanced Study	NON-PROPRIETARY ("SNAPSHOT") SURVEY - 2	unknown
0	3158	John Bahcall	Institute For Advanced Study	NON-PROPRIETARY ("SNAPSHOT") SURVEY - 1	unknown
0	3157	John Bahcall	Institute For Advanced Study	NON-PROPRIETARY ("SNAPSHOT") SURVEY - 4	unknown
0	3156	John Bahcall	Institute For Advanced Study	NON-PROPRIETARY ("SNAPSHOT") SURVEY - 3	unknown