HUBBLE SPACE TELESCOPE DAILY REPORT #2159 PERIOD COVERED: 0000Z (UTC) 07/06/98 - 0000Z (UTC) 07/07/98 Daily Status Report as of 188/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed Two Sets of STIS/CCD 7948 (CCD Dark and Bias Monitor -- Cont. to Dec. 98) The Space Telescope Imaging Spectrograph (CCD) was used to measure CCD dark current and bias rates for the two supported amplifier settings {GAIN=1 and GAIN=4} in order to gather data for making superdarks and superbiases. The data will be used 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. 1.2 Completed Three Sets of WF/PC-2 7620 (WF/PC-2 Cycle 7 Standard Darks) The WF/PC-2 was used to make a series of Cycle 7 standard dark calibration images. 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. The observations were executed as scheduled, and no anomalies were noted. 1.3 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 97-BLG-38. 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. 1.4 Completed Three Sets of WF/PC-2 7712 (WF/PC-2 Cycle 7 Supplemental Darks pt2/3) The WF/PC-2 was used to make a series of Cycle 7 supplemental calibration darks. This dark calibration program obtains three dark frames every day to provide data for monitoring and characterizing the evolution of hot pixels. The observations were executed as scheduled, and no anomalies were noted. 1.5 Completed NIC/2 7226 (Search for Massive Jupiters) The Near Infrared Camera (Camera Two) was used to make a corographic search for massive planets around nearby, young main sequence stars. Because of the extreme youth of these objects, any low-mass brown dwarf and planetary companions will still be in a higher luminosity phase and thus easily detectable. A dark calibration image was also taken. The observations were executed as scheduled, and no anomalies were noted. 1.6 Completed NIC/2 7862 (A Search for Near Infrared H-2 Emission in Active Elliptical Galaxies) The Near Infrared Camera (Camera Two) was used to make observations of active elliptical radio galaxy NGC-6251 to search for infrared H-2 region emissions. The observations were completed as scheduled, and no anomalies were reported. 1.7 Completed STIS/CCD 7930 (STIS CCD Binned Bias Monitor) The Space Telescope Imaging Spectrograph (CCD) was used to make numerous bias exposures in 1 x 2 binned mode in order to permit construction of "superbias" frames in which the effects of read noise have been rendered negligible. The observations were executed as scheduled, and no anomalies were noted. 1.8 Completed Five Sets of WF/PC-2 7909 (POMS Test Proposal: WF II Parallel Archive Proposal) The WF/PC-2 was used to make parallel observations as part of the POMS test proposal. This test proposal is designed to simulate scientific plans. The observations were completed as planned, and no problems were reported. 1.9 Completed WF/PC-2 7385 (Low-Mass Halo Binaries) The WF/PC-2 was used to make observations of the low mass, halo, binary, {Population II}, M-type, sub-dwarf, star LHS377. This star is too faint to be resolved through ground-based speckle interferometry, thus HST represents the only means of probing separations. The observations were completed as planned, and no anomalies were reported. 1.10 Completed Two Sets of STIS/MA2 7604 (Cycle 7 MAMA Dark Measurements) The Space Telescope Imaging Spectrograph (MA2) was used to make MAMA dark measurements. These darks will be used in later image reductions and also trended over the instrument's life time as an indicator of the detector's degradation or damage. The observations were completed as scheduled, and no problems were reported. 1.11 Completed NIC/1/2/3 7370 (The Low-Mass Pre-MS Stellar Content of the 30-Dor Starburst Cluster) The Near Infrared Camera (Cameras One, Two and Three) was used to make observations of the low-mass pre-main-sequence stellar content of the starbursting region of the cluster 30-Dor. The observations would tell us whether the 30-Dor cluster can be regarded as a prototype young globular cluster. The observations were completed as scheduled, and no anomalies were reported. 1.12 Completed Three Sets of 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 : 9 Successful : 9 2.2 FHST Updates: Scheduled : 15 Successful : 13 HSTAR 6572 documents an FHST full maneuver update which failed twice at 188/0720Z. HSTAR 6573 describes the failure of an FHST roll delay update at 188/0856Z. The subsequent acquisition at 188/0911Z was successful, however. 2.3 Operations Notes: The SSR EDAC error counter was cleared twice per ROP SR-1. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /DMH