HUBBLE SPACE TELESCOPE DAILY REPORT #2310 PERIOD COVERED: 0000Z (UTC) 02/16/99 - 0000Z (UTC) 02/17/99 Daily Status Report as of 048/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed Four 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. 1.2 Completed WF/PC-2 6434 (UV Imaging of S Andromedae {SN 1885} in M31) The WF/PC-2 was used to make ultraviolet imaging observations S-Andromedea (a.k.a., SN-1885) which is located in the bulge of galaxy M-31 (a.k.a., The Andromeda Galaxy). Optical HST images obtained by HST early in Cycle 5 show the remnant as a 0.6 arcsecond diameter absorption spot silhouetted against the bulge of M31. The observations were executed as scheduled, and no anomalies were noted. 1.3 Completed Two 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. 1.4 Completed STIS/CCD 8081 (STIS CCD Hot Pixel Annealing [2- II) The Space Telescope Imaging Spectrograph (CCD) was used to make a dark and a bias calibration observation. The effectiveness of the CCD hot pixel annealing process is assessed by measuring the dark current behavior before and after annealing and by searching for any window contamination effects. The observations were executed as scheduled, and no anomalies were noted. 1.5 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. 1.6 Completed STIS/CCD/MA1/MA2 7360 (A Search for Broad Absorption Lines in Narrow-Line Seyfert 1 Galaxies) The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was used to make ultraviolet spectrographic observations of the Seyfert galaxy 1H0707-495 to search for blueshifted absorption lines. A wavelength calibration image was also taken. The observations were completed as planned, and no problems were reported. 1.7 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 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, and no anomalies were noted. 1.8 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. 1.9 Completed Two Sets of 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. 1.10 Completed WF/PC-2 6353 (A Snapshot Emission Line Imaging Survey of Very Low Excitation Planetary Nebulas) The WF/PC-2 was used to make snapshot observations as part to an emission line survey of the very low excitation planetary nebula PK215-24D1 (Class PNe). This target was selected based on the O III/H alpha line flux ratio. The observations were executed as scheduled, and no anomalies were noted. 1.11 Completed WF/PC-2 7386 (A Snapshot Survey of Nova Shells) The WF/PC-2 was used to make observational images of the super nova shell V705-Cas in order to detect and measure its expanding gaseous shell. These observations will trace the distribution of hot and cool gas in the nova shells, and show their degree of inhomogeneity on both large and small scales. The observations were completed as scheduled, and no problems were noted. 1.12 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. 1.13 Completed WF/PC-2 6536 (IZW18: Building a Model) The WF/PC-2 was used to make observations of IZW18. IZW18 is host to the lowest metallicity H II region known, and, therefore, is pivotal in studies of the chemical evolution of galaxies, the primordial He abundance, and low metallicity stellar populations. The observations were completed as scheduled, and no anomalies were reported. 1.14 Completed Two Sets of 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. 1.15 Completed WF/PC-2 6967 (Blue Continuum Snapshots of 3CR Radio - Continued Galaxies) The WF/PC-2 was used to make observations of the radio galaxy 3C213.1. Radio galaxies are an important class of extragalactic objects: they represent one of the most energetic astrophysical phenomena and they may be used as probes of their environments. They are unique probes of the early Universe. The observations were completed as planned, and no problems were reported. 1.16 Completed STIS/CCD/MA1 7345 (Origin and Physical Conditions in the Local Lyman-Alpha Forest) The Space Telescope Imaging Spectrograph (MA1) was used to make observations of NGC-985 in order to study the origin and physical conditions in the local Lyman-Alpha forest. A wavelength calibration image was also taken. The observations were executed as scheduled, and no anomalies were noted. 2.0 FLIGHT OPERATIONS SUMMARY 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 6 Successful : 6 Scheduled Reacquisitions : 10 Successful : 10 2.2 FHST Updates: Scheduled : 13 Successful : 13 2.3 Operations Notes: Sustained realtime operations transitioned to CCS "A" string at 047/1446Z. No problems have been encountered. At 047/0445Z, the Gyro-3 rate bias trend data shows another step shift in the bias trend. The rate of change has been measured at 15.61 arcseconds/hour per day. The trend still exceeds the desired limit of 10.8 arcseconds/hour per day. Using ROP SR-1, the SSR EDAC error counter was cleared twice. A commanded DF-224 dump was not received in either CCS "A" string or PRS at 047/220057Z. The DOC, the Comm Manager and the DCF were contacted: they too saw no I-channel data. HSTAR 7002 was written. Since the problem could have been a network problem, a TTR was also written. The dump was successfully received at the next support. TTRs were written to document data hits on Q-channel and data inversions, both on day 048. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /DMH