HUBBLE SPACE TELESCOPE DAILY REPORT #2296 PERIOD COVERED: 0000Z (UTC) 01/27/99 - 0000Z (UTC) 01/28/99 Daily Status Report as of 028/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed 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 STIS/CCD 8091 (POMS Test Proposal: STIS Non-Scripted Parallel Proposal Continuation) The Space Telescope Imaging Spectrograph (CCD) was used to make high galactic latitude, non-scripted, parallel observations. The observations were completed as planned, and no anomalies were noted. 1.3 Completed WF/PC-2 6441 (The Unknown Stellar Populations in amorphous Galaxies: NGC 3077 AND M82) The WF/PC-2 was used to make observations of the galaxy NGC-3077 (Positions 1, 2 and 3) in order to study the unknown stellar populations in amorphous galaxies. In a ground-based attempt at the Palomar 5-meter telescope to determine the distances to the M-81 group galaxies using the tip of the redgiant branch (TRGB) method, there were discovered a population of at least 1700 star-like objects at I = 21-26 magnitude and V-I= 1.0 magnitude within and around the amorphous galaxy NGC 3077. The observations were completed as scheduled, and no problems were reported. 1.4 Completed STIS/CCD 8084 (POMS Test Proposal: STIS Non-Scripted Parallel Proposal Continuation) The Space Telescope Imaging Spectrograph (CCD) was used to make non-scripted parallel high galactic latitude observations as part of POMS test proposal. The observations were executed as scheduled, and no anomalies were noted. 1.5 Completed WF/PC-2 7618 (WF/PC-2 Cycle 7 Photometric Monitor UV/OPT STD) The WF/PC-2 was used to make observations of the standard star GRW+70D582 as part of a Cycle 7 photometric monitoring program. This ultraviolet spectrophotometric standard star was observed in a variety of filters and cameras to monitor the photometric stability and quantum efficiency of WF/PC-2 from the far-ultraviolet to near-infrared. The observations were completed as scheduled, and no problems were reported. 1.6 Completed Three Sets of WF/PC-2 7713 (WF/P-2 Cycle 7 Supplemental Darks pt3/3) The WF/PC-2 was used to make supplemental dark calibration images. 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 completed as planned, and no anomalies were noted. 1.7 Completed STIS/CCD 7350 (Testing the Supermassive Black Hole Paradigm in Nearby Radio-Quiet AGNs) The Space Telescope Imaging Spectrograph (CCD) was used to make observations of the radio-quite active galactic nuclei HR260. Obtaining a large sample of central engine mass determinations is a crucial first step toward understanding the physics of AGN central engines, including the puzzling difference between radio-loud and radio-quiet AGNs. A wavelength calibration observation and a CCD flat were also taken. The observations were completed as planned, and no anomalies were reported. 1.8 Completed Two Sets of WF/PC-2 8059 (POMS Test Proposal: WF-2 Targeted Parallel Archive Proposal) The WF/PC-2 was used to make observations in parallel with the prime science observations. The parallel opportunities available with WF/PC-2 in the neighborhood of bright galaxies are treated in a slightly different way from the normal pure parallels. Local group galaxies offer the opportunity for a closer look at young stellar populations. The observations were completed as planned, and no anomalies were reported. 1.9 Completed WF/PC-2 8061 (POMS Test Proposal: WF-II Backup Parallel Archive Proposal) This is a POMS test proposal designed to simulate scientific plans. The proposal was executed as planned, and no anomalies were reported. 1.10 Completed WF/PC-2 7619 (WF/PC-2 Cycle 7 Decontamination) The WF/PC-2 was used to conduct a Cycle 7 decontamination procedure. Ultraviolet-blocking contaminants were removed, and hot pixels cured, by warming the CCDs to +20C for 6 hours. A variety of internal images were taken before and after the decontamination in order to verify its success and to monitor the instrument health. The procedures were conducted as scheduled, and no problems were reported. 1.11 Completed WF/PC-2 7465 (White Dwarf Distance and Precision Age for Globular Clusters) The WF/PC-2 was used to make observations of white dwarf star WD0954+697 which is located in globular cluster 47-Tuc. The observed cooling sequences for the clusters is to be fit to the corresponding FCSs (Fiducial Cooling Sequences) to determine accurate cluster distance moduli and absolute ages. The observations were executed as scheduled, and no anomalies were noted. 1.12 Completed STIS/MA2 7950 (Cycle 7 MAMA Dark Measurements) The Space Telescope Imaging Spectrograph (MA2) was used to make a dark calibration image. This is to establish if the detectors are performing nominally, that no internal movement of the MCP has taken place, and establish dark level in orbit for a given operating temperature. These darks will be used in later image reduction and also trended over instrument life time as indicators of detector degradation or damage. The observations were completed as planned, and no problems were reported. 1.13 Completed STIS/MA2 7651 (STIS MAMA Dispersion Solution Check) The Space Telescope Imaging Spectrograph (MAMA-2) was used to make MAMA dispersion solution checks. Wavelength dispersion solutions will be determined on a yearly basis as part of a long-term monitoring program. The observations were completed as scheduled, and no anomalies were reported. 1.14 Completed STIS/MA! 7438 (Spatially-Resolved Spectroscopy of the UVX in Elliptical Galaxies) The Space Telescope Imaging Spectrograph (MA1) was used to make spatially resolved far-ultraviolet observations of the large elliptical galaxy NGC-3115. The prominent far-UV upturn {UVX} in the spectra of elliptical galaxies originates from stars in their old populations which have evolved beyond the He-flash at the tip of the red giant branch. A wavelength calibration image was also taken. The observations were completed as scheduled, and no anomalies were reported. 1.15 Completed STIS/CCD 8055 (Long Slit Spectroscopy of the Seyfert Galaxies) The Space Telescope Imaging Spectrograph (CCD) was used to make long slit spectrographic observations of the Seyfert galaxy NGC-52562. These observations are particularly important to detect and measure the mass concentration associated with any central massive black hole. The observations were executed as scheduled, and no anomalies were noted. 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 : 13 Successful : 12 The update at 028/0831Z failed. 2.3 Operations Notes: The SSR EDAC error counter was cleared once using ROP SR-1. A Canberra proficiency test was successfully concluded at 027/1620Z. At 028/084544Z, the STIS MCE-1 reset while in an SAA interval and while the low voltage was on. HSTAR 6950 was written. Using ROP NS-12m, the STIS flight software error counter was reset at 028/0919Z. MAMA-1 recovery will be accomplished via the SMS at 030/0728Z, the time of the next planned high voltage commanding. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /DMH