HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4814 PERIOD COVERED: 5am March 18 - 5am March 19, 2009 (DOY 077/0900z-078/0900z) OBSERVATIONS SCHEDULED ACS/SBC 11151 Evaluating the Role of Photoevaporation of Protoplanetary Disk Dispersal Emission produced by accretion onto the central star leads to photoevaporation, which may play a fundamental role in disk dispersal. Models of disk photoevaporation by the central star are challenged by two potent ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4813 PERIOD COVERED: 5am March 17 - 5am March 18, 2009 (DOY 076/0900z-077/0900z) OBSERVATIONS SCHEDULED WFPC2 11978 Luminous and Dark Matter in Disk Galaxies from Strong Lensing and Stellar Kinematics The formation of realistic disk galaxies within the LCDM paradigm is still an unsolved problem. Theory is only now beginning to make predictions for how dark matter halos respond to galaxy formation and ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4812 PERIOD COVERED: 5am March 16 - 5am March 17, 2009 (DOY 075/0900z-076/0900z) 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 will a ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4811 PERIOD COVERED: 5am March 13 - 5am March 16, 2009 (DOY 072/0900z-075/0900z) OBSERVATIONS SCHEDULED WFPC2 11987 The Recent Star Formation History of SINGS Galaxies The Spitzer Legacy project SINGS provided a unique view of the current state of star formation and dust in a sample of galaxies of all Hubble types. This multi-wavelength view allowed the team to create current star formation diagnosti ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT      #4810 PERIOD COVERED: 5am March 12 - 5am March 13, 2009 (DOY 071/1000z-072/1000z) OBSERVATIONS SCHEDULED FGS 11785 Trigonometric Calibration of the Distance Scale for Classical Novae The distance scale for classical novae is important for understanding the stellar physics of their thermonuclear runaways, their contribution to Galactic nucleosynthesis, and their use as extragalactic standard candles. Althoug ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4809 PERIOD COVERED: 5am March 11 - 5am March 12, 2009 (DOY 070/1000z-071/1000z) 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 feedback ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT        #4808 PERIOD COVERED: 5am March 10 - 5am March 11, 2009 (DOY 069/1000z-070/1000z) OBSERVATIONS SCHEDULED FGS 11789 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, howe ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4807 PERIOD COVERED: 5am March 9 - 5am March 10, 2009 (DOY 068/1000z-069/1000z) 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 2.7<z& ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4806 PERIOD COVERED: 5am March 6 - 5am March 9, 2009 (DOY 065/1000z-068/1000z) 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 the main auroral oval, have been observed by the C ...Continue Reading

Cooper, Joe would like to recall the message, "DR #4806 for review". ...Continue Reading