HUBBLE SPACE TELESCOPE DAILY REPORT #2454 PERIOD COVERED: 0000Z (UTC) 09/09/99 - 0000Z (UTC) 09/10/99 Daily Status Report as of 253/0000Z 1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED: 1.1 Completed Three Sets of WF/PC-2 8441 (WF/PC-2 Decontaminations and Associated Observations Pt. 1/2) The WF/PC-2 was used to make its monthly decontamination operations. Also included are instrument monitors tied to decons: photometric stability check, focus monitor, pre- and post-decon internals {bias, internal flats, k-spots, and darks}, and ultraviolet throughput checks. Observations were also made oaf standard source GRW+70D582. The observations were executed as scheduled, and no anomalies were noted. 1.2 Completed STIS/CCD 8409 (STIS CCD Bias Monitor C8) The Space Telescope Imaging Spectrograph (CCD) was used to make a CCD bias calibration observation. This is to monitor the bias in the 1x1, 1x2, 2x1, and 2x2 bin settings at gain=1, and 1x1 at gain = 4, to build up high-S/N superbiases and to track the evolution of hot columns. The observations were executed as scheduled, and no anomalies were reported. 1.3 Completed Two Sets of STIS/CCD 8202 (Bright Quasar Close Lensing Search) The Space Telescope Imaging Spectrograph (CCD) was used to make observations of HCLQ2353-2 and HCLQ0905+4 as part of a second generation survey to search for bright lensing quasars. With the restored PSF, new images will be considerably more sensitive to the presence of both close separation and faint lens components, and because STIS reaches two magnitudes fainter the PC, the new snapshot images will have much greater dynamic range. The observations were executed as scheduled, and no anomalies were noted. 1.4 Completed Two Sets of STIS/CCD 8408 (STIS CCD Dark Monitor C8) The Space Telescope Imaging Spectrograph (CCD) was used to make a CCD bias calibration observation. This is to monitor the darks for the STIS CCD. The observations were executed as scheduled, and no anomalies were reported. 1.5 Completed STIS/CCD/MA1 7432 (Morphological and Spectral Evolution of Galaxies) The Space Telescope Imaging Spectrograph (CCD and MA1) was used to make observations to study the morphological and spectral evolution of the galaxy 3C303-1. A library of ultraviolet images of normal galaxies at low redshifts is essential to our understanding of the properties and evolution of the high redshift universe. The observations were completed as planned, and no problems were reported. 1.6 Completed Two Sets of WF/PC-2 8443 (WF/PC-2 Cycle-8 Supplemental Darks pt1/3) The WF/PC-2 was used to obtain three dark frames every day to provide data for monitoring and characterizing the evolution of hot pixels. The observations were completed as planned, and no problems were reported. 1.7 Completed WF/PC-2 8194 (Evolution of high-redshift Seyfert Galaxies) The WF/PC-2 was used to make observations of the high-redshifted Seyfert galaxy Gal-105105 in order to study its evolution. The observations will provide insights into the Seyfert phenomenon at intermediate redshift and will complement similar HST studies of normal galaxies, clusters and quasars. The observations were executed as scheduled, and no anomalies were noted. 1.8 Completed STIS/CCD 8406 (POMS Test Proposal: STIS Non-Scripted Parallel Proposal Continuation V) The Space Telescope Imaging Spectrograph (CCD) was used to make high 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. 1.9 Completed STIS/CCD 7435 (Nuclear Kinematics and Stellar Population Gradients in the Recent Merger Remnants NGC-7252 & NGC-3921) The Space Telescope Imaging Spectrograph (CCD) was used to make observations of NGC-7252 in order to study its nuclear kinematics and stellar population gradients. Ground-based spectra show that this galaxy contains centrally concentrated young stellar populations and emission-line gas, indicative of a merger-induced episode of star formation. A wave length calibration observation was also taken. The observations were completed as planned, and no problems were reported. 1.10 Completed 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 high 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, and no anomalies were noted. 1.11 Completed STIS/CCD/MA1 7760 (UV Spectroscopy of the Luminous Cooling Flow Nebula in A2597) The Space Telescope Imaging Spectrograph (CCD, and MA1) was used to make ultraviolet emission line spectrographic observations of the luminous cooling flow Nebula Abell 2597. These observations will provide the first detection of ultraviolet lines {other than Lyman-Alpha which was detected by IUE} in the spectrum of a cooling flow nebula. A wavelength calibration image was also taken. The observations were executed as scheduled, and no anomalies were noted. 1.12 Completed WF/PC-2 8457 (UV Earthflats) The WF/PC-2 was used to make a ultraviolet Earth flat calibration image. This is to improve the quality of pipeline the ultraviolet flatfields. The observations were completed as scheduled, and no problems were reported. 2.0 FLIGHT OPERATIONS SUMMARY: 2.1 Guide Star Acquisitions: Scheduled Acquisitions: 6 Successful: 6 Scheduled Re-acquisitions: 10 Successful: 10 2.2 FHST Updates: Scheduled: 14 Successful: 13 The update at 252/0354Z failed. 2.3 Operations Notes: Real-time operations transitioned from the SAMS back-up facility, where the PRS ground system was used, to the STOCC area and CCS “B” string at 252/2115Z. Using ROP SR-1, the SSR EDAC error counter was cleared five times. Per HSTAR 7249, the Battery 2 voltage temporarily flagged out-of-limits low at 253/0924Z, near the end of orbit night. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /DMH