HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science   DAILY REPORT    #4658   PERIOD COVERED: 5am July 22 - 5am July 23, 2008 (DOY 204/0900z-205/0900z)   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 separation ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT    #4657 PERIOD COVERED: 5am July 21 - 5am July 22, 2008 (DOY 203/0900z-204/0900z) OBSERVATIONS SCHEDULED ACS/SBC 11131 Star Formation at Large Radii in Cooling Flow Brightest Cluster Galaxies We propose to take deep ACS FUV images of the bright central galaxies in two powerful cooling flow clusters for which we have VLT UBR images, with the object of determining whether the UV excesses we observe at large radii (> ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT    #4656 PERIOD COVERED: 5am July 18 - 5am July 21, 2008 (DOY 200/0900z-203/0900z) OBSERVATIONS SCHEDULED NIC1/NIC2/NIC3 8795 NICMOS Post-SAA Calibration - CR Persistence Part 6 A new procedure proposed to alleviate the CR-persistence problem of NICMOS. Dark frames will be obtained immediately upon exiting the SAA contour 23, and every time a NICMOS exposure is scheduled within 50 minutes of coming out of the SAA. The d ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT    #4655 PERIOD COVERED: 5am July 17 - 5am July 18, 2008 (DOY 199/0900z-200/0900z) 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 potential problems: t ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       #4654 PERIOD COVERED: 5am July 16 - 5am July 17, 2008 (DOY 198/0900z-199/0900z) OBSERVATIONS SCHEDULED NIC1/NIC2/NIC3 8795 NICMOS Post-SAA Calibration - CR Persistence Part 6 A new procedure proposed to alleviate the CR-persistence problem of NICMOS. Dark frames will be obtained immediately upon exiting the SAA contour 23, and every time a NICMOS exposure is scheduled within 50 minutes of coming ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT      #4653 PERIOD COVERED: 5am July 15 - 5am July 16, 2008 (DOY 197/0900z-198/0900z) OBSERVATIONS SCHEDULED NIC1/NIC2/NIC3 8795 NICMOS Post-SAA Calibration - CR Persistence Part 6 A new procedure proposed to alleviate the CR-persistence problem of NICMOS. Dark frames will be obtained immediately upon exiting the SAA contour 23, and every time a NICMOS exposure is scheduled within 50 minutes of coming out of ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science   DAILY REPORT    #4652   PERIOD COVERED: 5am July 14 - 5am July 15, 2008 (DOY 196/0900z-197/0900z)   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 ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT      #4651 PERIOD COVERED: 5am July 11 - 5am July 14, 2008 (DOY193/0900z-196/0900z) OBSERVATIONS SCHEDULED NIC1/NIC2/NIC3 8795 NICMOS Post-SAA Calibration - CR Persistence Part 6 A new procedure proposed to alleviate the CR-persistence problem of NICMOS. Dark frames will be obtained immediately upon exiting the SAA contour 23, and every time a NICMOS exposure is scheduled within 50 minutes of coming out of ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science   DAILY REPORT #4650   PERIOD COVERED: 5am July 10 - 5am July 11, 2008 (DOY192/0900z-193/0900z)   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 po ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT #4647 PERIOD COVERED: 5am July 7 - 5am July 8, 2008 (DOY 189/0900z-190/0900z) OBSERVATIONS SCHEDULED ACS/SBC 11215 New Sightlines for the Study of Intergalactic Helium: Dozens of High-Confidence, UV-Bright Quasars from SDSS/GALEX The reionization of IGM helium is thought to have occurred at redshifts of z=3 to 4. Detailed study of HeII Lyman-alpha absorption toward a handful of QSOs at 2.7<z<3.3 demonstrated the high potentia ...Continue Reading