HUBBLE SPACE TELESCOPE CONTINUING TO DO WORLD CLASS SCIENCE DAILY REPORT      #4709 PERIOD COVERED: 5am October 2 - 5am October 3, 2008 (DOY 276/0900z-277/0900z) OBSERVATIONS SCHEDULED: None FLIGHT OPERATIONS SUMMARY: Significant Spacecraft Anomalies: (The following are preliminary reports of potential non-nominal performance that will be investigated.) HSTARS: 11523 - GSAcq(1,2,1) fails due to stop flag on FGS1 GSacq1,2,1 at 276/21:32:52 to 21:40:11 fails due to STOP flag on FGS1. COMPL ...Continue Reading

HUBBLE SPACE TELESCOPE DAILY REPORT      #4708 PERIOD COVERED: 5am October 1 - 5am October 2, 2008 (DOY 275/0900z-276/0900z) OBSERVATIONS SCHEDULED FGS 11299 Calibrating the Mass-Luminosity Relation at the End of the Main Sequence We propose to use HST-FGS1R to finish calibrating the mass-luminosity relation for stars less massive than 0.5 Msun, with special emphasis on objects near the stellar/substellar border. Our goals are to determine Mv values to 0.05 magnitude and masses to 5%, an ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science   DAILY REPORT      #4706   PERIOD COVERED: 5am September 29 - 5am September 30, 2008 (DOY 273/0900z-274/0900z)   OBSERVATIONS SCHEDULED   FGS 11212   Filling the Period Gap for Massive Binaries   The current census of binaries among the massive O-type stars is seriously incomplete for systems in the period range from years to millennia because the radial velocity variations are too small and ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science   DAILY REPORT    #4705   PERIOD COVERED: 5am September 26 - 5am September 29, 2008 (DOY 270/0900z-273/0900z)   OBSERVATIONS SCHEDULED   WFPC2 11796   WFPC2 Cycle 16 Decontaminations and Associated Observations   This proposal is for the WFPC2 decons. Also included are instrumentmonitors tied to decons: photometric stability check, focus monitor,pre- and post-decon internals (bias, intflats, kspots ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4704 PERIOD COVERED: 5am September 25 - 5am September 26, 2008 (DOY 269/0900z-270/0900z) OBSERVATIONS SCHEDULED FGS 11213 Distances to Eclipsing M Dwarf Binaries We propose HST FGS observations to measure accurate distances of 5 nearby M dwarf eclipsing binary systems, from which model-independent luminosities can be calculated. These objects have either poor or no existing parallax measurements ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT      #4703 PERIOD COVERED: 5am September 24 - 5am September 25, 2008 (DOY 268/0900z-269/0900z) OBSERVATIONS SCHEDULED FGS 11211 An Astrometric Calibration of Population II Distance Indicators In 2002 HST produced a highly precise parallax for RR Lyrae. That measurement resulted in an absolute magnitude, M{V}= 0.61+/-0.11, a useful result, judged by the over ten refereed citations each year since. It is, how ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT      #4702 PERIOD COVERED: 5am September 23 - 5am September 24, 2008 (DOY 267/0900z-268/0900z) OBSERVATIONS SCHEDULED ACS/SBC 10872 Lyman Continuum Emission in Galaxies at z=1.2 Lyman continuum photons produced in massive starbursts may have played a dominant role in the reionization of the Universe. Starbursts are important contributors to the ionizing metagalactic background at lower redshifts as well. Ho ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT      #4699 PERIOD COVERED: 5am September 18 - 5am September 19, 2008 (DOY 262/0900z 263/0900z) OBSERVATIONS SCHEDULED ACS/SBC WFPC2 11175 UV Imaging to Determine the Location of Residual Star Formation in Galaxies Recently Arrived on the Red Sequence We have identified a sample of low-redshift {z = 0.04 - 0.10} galaxies that are candidates for recent arrival on the red sequence. They have red optical colors ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4698 PERIOD COVERED: 5am September 17 - 5am September 18, 2008 (DOY 261/0900z-262/0900z) OBSERVATIONS SCHEDULED ACS/SBC 11175 UV Imaging to Determine the Location of Residual Star Formation in Galaxies Recently Arrived on the Red Sequence We have identified a sample of low-redshift {z = 0.04 - 0.10} galaxies that are candidates for recent arrival on the red sequence. They have red optical colors ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science   DAILY REPORT      #4697   PERIOD COVERED: 5am September 16 - 5am September 17, 2008 (DOY 260/0900z-261/0900z)   OBSERVATIONS SCHEDULED   ACS/SBC 11158   HST Imaging of UV Emission in Quiescent Early-type Galaxies   We have constructed a sample of early type galaxies at z~0.1 that have blue UV-optical colors, yet also show no signs of optical emission, or extended blue light. We have cross-co ...Continue Reading