HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT    # 4557 PERIOD COVERED: UT February 28, 2008 (DOY 059) 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 we propose to discover binar ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT    # 4556 PERIOD COVERED: UT February 27, 2008 (DOY 058) OBSERVATIONS SCHEDULED FGS 11298 Calibrating Cosmological Chronometers: White Dwarf Masses We propose to use HST/FGS1R to determine White Dwarf {WD} masses. The unmatched resolving power of HST/FGS1R will be utilized to follow up four selected WD binary pairs. This high precision obtained with HST/FGS1R simply cannot be equaled by any ground ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT    # 4555 PERIOD COVERED: UT February 26, 2008 (DOY 057) OBSERVATIONS SCHEDULED FGS 11210 The Architecture of Exoplanetary Systems Are all planetary systems coplanar? Concordance cosmogony makes that prediction. It is, however, a prediction of extrasolar planetary system architecture as yet untested by direct observation for main sequence stars other than the Sun. To provide such a test, we propose to carry out FGS a ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT    # 4554 PERIOD COVERED: UT February 25, 2008 (DOY 056) OBSERVATIONS SCHEDULED WFPC2 11024 WFPC2 CYCLE 15 INTERNAL MONITOR This calibration proposal is the Cycle 15 routine internal monitor for WFPC2, to be run weekly to monitor the health of the cameras. A variety of internal exposures are obtained in order to provide a monitor of the integrity of the CCD camera electronics in both bays {both gain 7 and gain 15 -- ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       # 4553 PERIOD COVERED: UT February 22,23,24, 2008 (DOY 053,054,055) 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 SA ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science   DAILY REPORT      # 4552   PERIOD COVERED: UT February 21, 2008 (DOY 052) OBSERVATIONS SCHEDULED   WFPC2 10583   Resolving the LMC Microlensing Puzzle: Where Are the Lensing Objects ?   We are requesting 32 HST orbits to help ascertain the nature of thepopulation that gives rise to the observed set of microlensing eventstowards the LMC. The SuperMACHO project is an ongoing ground-basedsurvey ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       # 4551 PERIOD COVERED: UT February 20, 2008 (DOY 051) 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, however, unsatisfactory to have the d ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       # 4550 PERIOD COVERED: UT February 19, 2008 (DOY 050) 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 darks wi ...Continue Reading

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science DAILY REPORT       # 4549 PERIOD COVERED: UT February 15,16,17,18, 2008 (DOY 046,047,048,049) 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      # 4548 PERIOD COVERED: UT February 14, 2008 (DOY 045) OBSERVATIONS SCHEDULED ACS/SBC 10862 Comprehensive Auroral Imaging of Jupiter and Saturn during the International Heliophysical Year A comprehensive set of observations of the auroral emissions from Jupiter and Saturn is proposed for the International Heliophysical Year in 2007, a unique period of especially concentrated measurements of space physic ...Continue Reading