HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science   DAILY REPORT      #4711   PERIOD COVERED: 5am October 6 - 5am October 7, 2008 (DOY 280/0900z-281/0900z)   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 the ang ...Continue Reading

HUBBLE SPACE TELESCOPE- Continuing to collect World Class Science DAILY REPORT    #4710 PERIOD COVERED: 5am October 3 - 5am October 6, 2008 (DOY 277/0900z-280/0900z) 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 the angular separations too close for easy detection. Here ...Continue Reading

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