HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4834 PERIOD COVERED: 5am April 15 - 5am April 16, 2009 (DOY 105/0900z-106/0900z) OBSERVATIONS SCHEDULED ACS/SBC 11980 Deep FUV Imaging of Cooling Flow Clusters We propose to take deep ACS FUV images of a carefully selected sample of 19 bright central galaxies in nearby galaxy clusters. This program is the last critical element of a comprehensive investigation of the impact of stellar and AGN feedback ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4833 PERIOD COVERED: 5am April 14 - 5am April 15, 2009 (DOY 104/0900z-105/0900z) OBSERVATIONS SCHEDULED WFPC2 11974 High-resolution Imaging for 9 Very Bright, Spectroscopically Confirmed, Group-scale Lenses There are large samples of strong lenses that probe small (galaxy) scale masses (e.g., SLACS, SQLS, COSMOS). There are also large samples of strong lenses that probe large (rich cluster) scale mas ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4832 PERIOD COVERED: 5am April 13 - 5am April 14, 2009 (DOY 103/0900z-104/0900z) OBSERVATIONS SCHEDULED SIGNIFICANT EVENTS: (None) ACS/SBC 11982 Spanning the Reionization History of IGM Helium: a Large and Efficient HST Spectral Survey of Far-UV-Bright Quasars The reionization of IGM helium is thought to have occurred at redshifts of z=3 to 4. Detailed studies of HeII Lyman-alpha absorption toward a ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT      #4831 PERIOD COVERED: 5am April 10 - 5am April 13, 2009 (DOY        100/0900z-103/0900z) OBSERVATIONS SCHEDULED WFPC2 11990 Determining the Physical Properties of Comet 103P/Hartley 2 in Support of NASA's EPOXI Mission We request 12 orbits of imaging to measure the size, shape, and rotation period of the nucleus of comet 103P/Hartley 2, the target of NASA's EPOXI mission. Knowle ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT      #4830 PERIOD COVERED: 5am April 9 - 5am April 10, 2009 (DOY 099/0900z-100/0900z) OBSERVATIONS SCHEDULED ACS/SBC 11980 Deep FUV Imaging of Cooling Flow Clusters We propose to take deep ACS FUV images of a carefully selected sample of 19 bright central galaxies in nearby galaxy clusters. This program is the last critical element of a comprehensive investigation of the impact of stellar and AGN feedback on the ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT      #4829 PERIOD COVERED: 5am April 8 - 5am April 9, 2009 (DOY 098/0900z-099/0900z) OBSERVATIONS SCHEDULED ACS/SBC 11982 Spanning the Reionization History of IGM Helium: a Large and Efficient HST Spectral Survey of Far-UV-Bright Quasars The reionization of IGM helium is thought to have occurred at redshifts of z=3 to 4. Detailed studies of HeII Lyman-alpha absorption toward a handful of QSOs at 2.7<z<3.3 ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4828 PERIOD COVERED: 5am April 7 - 5am April 8, 2009 (DOY 097/0900z-098/0900z) OBSERVATIONS SCHEDULED ACS/SBC 11982 Spanning the Reionization History of IGM Helium: a Large and Efficient HST Spectral Survey of Far-UV-Bright Quasars The reionization of IGM helium is thought to have occurred at redshifts of z=3 to 4. Detailed studies of HeII Lyman-alpha absorption toward a handful of QSOs at 2.7<z&l ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4825 PERIOD COVERED: 5am April 2 - 5am April 3, 2009 (DOY 092/0900z-093/0900z) OBSERVATIONS SCHEDULED FGS 11704 The Ages of Globular Clusters and the Population II Distance Scale Globular clusters are the oldest objects in the universe whose age can be accurately determined. The dominant error in globular cluster age determinations is the uncertain Population II distance scale. We propose to use FGS ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT      #4824 PERIOD COVERED: 5am April 1 - 5am April 2, 2009 (DOY 091/0900z-092/0900z) OBSERVATIONS SCHEDULED WFPC2 11794 Cycle 16 Visible Earth Flats This proposal monitors flatfield stability. This proposal obtains sequences of Earth streak flats to construct high quality flat fields for the WFPC2 filter set. These flat fields will allow mapping of the OTA illumination pattern and will be used in conjunction wit ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4823 PERIOD COVERED: 5am March 31 - 5am April 1, 2009 (DOY 090/0900z-091/0900z) OBSERVATIONS SCHEDULED ACS/SBC 11982 Spanning the Reionization History of IGM Helium: a Large and Efficient HST Spectral Survey of Far-UV-Bright Quasars The reionization of IGM helium is thought to have occurred at redshifts of z=3 to 4. Detailed studies of HeII Lyman-alpha absorption toward a handful of QSOs at 2.7<z& ...Continue Reading