HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4801 PERIOD COVERED: 5am February 27 - 5am March 2, 2009 (DOY        058/1000z-061/1000z) OBSERVATIONS SCHEDULED WFPC2 11986 Completing HST's Local Volume Legacy Nearby galaxies offer one of the few laboratories within which stellar populations can be tied to multi-wavelength observations. They are thus essential for calibrating and interpreting key astrophysical observa ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4800 PERIOD COVERED: 5am February 26 - 5am February 27, 2009 (DOY 057/1000z-058/1000z) 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. ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4799 PERIOD COVERED: 5am February 25 - 5am February 26, 2009 (DOY 056/1000z-057/1000z) OBSERVATIONS SCHEDULED FGS 11943 Binaries at the Extremes of the H-R Diagram We propose to use HST/Fine Guidance Sensor 1r to survey for binaries among some of the most massive, least massive, and oldest stars in our part of the Galaxy. FGS allows us to spatially resolve binary systems that are too faint for ground- ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4798 PERIOD COVERED: 5am February 24 - 5am February 25, 2009 (DOY 055/1000z-056/1000z) 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 fe ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4797 PERIOD COVERED: 5am February 23 - 5am February 24, 2009 (DOY 054/1000z-055/1000z) OBSERVATIONS SCHEDULED WFPC2 11302 WFPC2 CYCLE 16 Standard Darks - Part III This dark calibration program obtains dark frames every week in order to provide data for the ongoing calibration of the CCD dark current rate, and to monitor and characterize the evolution of hot pixels. Over an extended period these data ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4796 PERIOD COVERED: 5am February 20 - 5am February 23, 2009 (DOY  051/1000z-054/1000z) OBSERVATIONS SCHEDULED WFPC2 11991 Constraining the Late Time Lightcurve and Energy of GRB 090102 We propose to conduct a series of late time observations of the lightcurve of the bright gamma-ray burst GRB 090102. Declared a burst of interest by the Swift team, and with excellent broadband data covering the ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT      #4795 PERIOD COVERED: 5am February 19 - 5am February 20, 2009 (DOY 050/1000z-051/1000z) OBSERVATIONS SCHEDULED WFPC2 11590 Observing the IR Catastrophe in a Deflagration Type Ia Supernova Our lack of understanding of Type Ia supernova (SN Ia) explosions limits our confidence in their use for cosmology. While there is broad agreement that these objects represent the explosions of white dwarfs, the details of ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT      #4794 PERIOD COVERED: 5am February 18 - 5am February 19, 2009 (DOY         049/1000z-050/1000z) OBSERVATIONS SCHEDULED ACS/SBC 11984 Observing Saturn's High Latitude Polar Auroras Planetary auroral emissions are critical indicators of how the magnetospheres of the planets work. Recently, a new component of Saturn's auroral emissions, i.e. high latitude auroras inside t ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4793 PERIOD COVERED: 5am February 17 - 5am February 18, 2009 (DOY         048/1000z-049/1000z) OBSERVATIONS SCHEDULED ACS/SBC 11984 Observing Saturn's High Latitude Polar Auroras Planetary auroral emissions are critical indicators of how the magnetospheres of the planets work. Recently, a new component of Saturn's auroral emissions, i.e. high latitude auroras ins ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT      #4792 PERIOD COVERED: 5am February 13 - 5am February 17, 2009 (DOY 044/1000z-048/1000z) OBSERVATIONS SCHEDULED WFPC2 11986 Completing HST's Local Volume Legacy Nearby galaxies offer one of the few laboratories within which stellar populations can be tied to multi-wavelength observations. They are thus essential for calibrating and interpreting key astrophysical observables, such as broad-band luminosities, ...Continue Reading