HUBBLE SPACE TELESCOPE DAILY REPORT #2390 PERIOD COVERED: 0000Z (UTC) 06/09/99 - 0000Z (UTC) 06/10/99 Daily Status Report as of 161/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed Two Sets of WF/PC-2 7621 (WF/PC-2 Cycle 7 Supplemental Darks PT1/3) The WF/PC-2 was used to make supplemental dark calibration images. This set of calibrations is intended to obtain three dark frames every day to provide data for monitoring and characterizing the evolution of hot pixels. The observations were executed with no anomalies. 1.2 Completed S/C 8536 (GS Acq test for 8267) A guide star acquisition was conducted using Target Star A and B. The is a robust test of the guide stars to be used by proposal 8267. The acquisition was executed as scheduled, and no anomalies were noted. 1.3 Completed WF/PC-2/STIS/CCD 7615 (Determination of the Mass Function of a Globular Cluster Through Gravitational Microlensing) The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were used to make gravitational microlensing observations of the large globular cluster NGC-6656 located in Sagittarius in order to study its mass function. Gravitational microlensing offers a unique and direct method of determining the masses of stars and other compact objects down to planetary masses. A bias and dark calibration observations were also taken. The observations were completed as planned, and no problems were reported. 1.4 Completed Two Sets of STIS/CCD 7949 (CCD Dark and Bias Monitor -- Cont. to June 99) The Space Telescope Imaging Spectrograph (CCD) was used to conduct a CCD dark calibration and a bias monitoring program. It was also scheduled to track the growth of hot pixels on the CCD in general and within the various target acquisition apertures specifically. The observations were executed as scheduled, and no anomalies were noted. 1.5 Completed Two Sets of WF/PC-2 8053 (WF/PC-2 Cycle-7 Earth Flats -- Part II) The WF/PC-2 was used to take Earth flat calibration images. This proposal obtains sequences of Earth streak flats to construct high quality flat fields for the WF/PC-2 filter set. The observations were executed as scheduled with no anomalies. 1.6 Completed STIS/CCD 8172 (STIS Deep DLA Imaging Survey II) The Space Telescope Imaging Spectrograph (CCD) was used to make deep observations of quasar/alpha galaxy Q2233+131. The HST imaging, together with ground-based spectroscopy, will unify absorption-line studies and faint galaxy imaging studies, providing a comprehensive picture of the history of assembly, star formation, gas consumption, and chemical enrichment in the Damped Lyman-Alpha galaxies. The observations were executed as scheduled, and no anomalies were noted. 1.7 Completed WF/PC-2 7431 (Snapshot Survey of Microlensed Source Stars) The WF/PC-2 was used to make snapshot survey images of microlensed source star MACHO-95-3. Gravitational microlensing surveys have revealed an excess of lensing events over theoretical predictions toward both the Large Magellanic Cloud and the Galactic Bulge. The observations were completed as planned, and no anomalies were reported. 1.8 Completed Two Sets of WF/PC-2 7281 (Snapshot Survey of the B2 Sample of Radio Galaxies) The WF/PC-2 was used to make snapshot survey observations of the B2 sample radio galaxies B2+0116+31 and B2+1005+28. This program is aimed to answer the following key questions: How common are extended nuclear disks? What is their orientation and morphology? How common are optical jets? The observations were executed as scheduled, and no anomalies were noted. 1.9 Completed WF/PC-2 7470 (A Snapshot Survey of Galactic Globular Clusters) The WF/PC-2 was used to make snapshot survey observations of the crowded center of the galactic globular cluster NGC-6304. The resulting color-magnitude diagram will include all stars down to about one magnitude below the main-sequence turnoff. The observations were completed as scheduled with no problems. 1.10 Completed Two Sets of STIS/CCD 8406 (POMS Test Proposal: STIS Non-Scripted Parallel Proposal Continuation V) The Space Telescope Imaging Spectrograph (CCD) was used to make low galactic latitude observations taken in parallel with the prime science observations as part of a POMS proposal. This is a STIS non-scripted parallel Condition V proposal. The observations were completed as scheduled, and no anomalies were reported. 1.11 Completed STIS/CCD/WF/PC-2 7388 (Black Holes and the Centers of Galaxies) The Space Telescope Imaging Spectrograph (CCD) and the WF/PC-2 were used to continue our survey of the center of nearby galaxy NGC-4649. The major goal is to survey an unbiased set of galaxies with a potentially wide range of black hole masses. The sample has been carefully chosen to optimize leverage on the character of a proposed correlation of black hole mass with galaxy mass. A wavelength calibration image was also taken. The observations were completed as scheduled with no anomalies. 1.12 Completed Two Sets of WF/PC-2 8090 (POMS Test Proposal: WF-II Parallel Archive Proposal Continuation) The WF/PC-2 was used in the parallel mode to make some low galactic latitude archive observations. The program will be used to take parallel images of random areas of the sky. The observations were executed as scheduled with no anomalies. 1.13 Completed STIS/CCD/MA1 7508 (Ultraviolet Line Eclipses by Extrasolar Planets) The Space Telescope Imaging Spectrograph (CCD and MA1) were used to make observations of star HD120136 in order to obtain ultraviolet line eclipses by extrasolar planets. One of the most exciting events in astronomy last year was the discovery of extrasolar planets. A wavelength calibration image was also taken. The observations were completed as planned, and no problems were reported. 1.14 Completed STIS/CCD 8080 (STIS Spectroscopic CCD Flatfielding -- Revised) The Space Telescope Imaging Spectrograph (CCD) was used to make CCD flat fielding calibration observations in the spectroscopic mode. The observations were completed as planned, and no anomalies were reported. 1.15 Completed WF/PC-2 6406 (Intermediate Mass Stars and Unusual Stellar Mass Limits in a Starburst Galaxy) The WF/PC-2 was used to make observations of the intermediate mass stars which are located in the starbursting galaxy IC10. This dwarf irregular galaxy is the nearest example of the global starburst phenomena. As such, it offers a unique opportunity to test ideas about the star formation process in such an environment. The observations were completed as scheduled, and no problems were reported. 1.16 Completed STIS/CCD 7912 (STIS Parallel Archive Proposal - Nearby Galaxies - Imaging and Spectroscopy) The Space Telescope Imaging Spectrograph (CCD) was used to make parallel observations of nearby galaxies. This survey will be useful to study the star formation histories, chemical evolution, and distances to these galaxies. These data will be placed immediately into the Hubble Data Archive. The observations were completed as scheduled, and no problems were reported. 2.0 FLIGHT OPERATIONS SUMMARY 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 7 Successful : 7 Scheduled Reacquisitions : 6 Successful : 6 2.2 FHST Updates: Scheduled : 18 Successful : 18 Per HSTAR 7163, an FHST map at 161/0405Z did not acquire any stars in FHST-1. PASSOPS was operating on the PRS ground system at the time. 2.3 Operations Notes: After transitioning to operating on CCS string "A" in the morning, operations were transferred to the PRS ground system at 160/2040Z. Using ROP SR-1, the SSR EDAC error counter was cleared six times. A WF/PC-2 microprocessor dump was performed at 160/1648Z per ROP NS-4. As documented in HSTAR 7162, a STIS Echelle/Mode/Calibration (EMC) retry occurred at 161/010318Z after an apparent movement failure. The STIS flight software error counter was reset at 161/0117Z as directed by ROP NS-12. The SSR pointer was set twice for the CCS 48-hour engineering dump collection test. This test is being conducted on CCS string "B". 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /DMH