HUBBLE SPACE TELESCOPE DAILY REPORT #1936 PERIOD COVERED: 0000Z (UTC) 08/06/97 - 0000Z (UTC) 08/07/97 Daily Status Report as of 219/0000Z 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 dark 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 as scheduled, and no anomalies were noted. 1.2 Completed Two Sets of STIS/CCD 7659 (Daily Darks to Update Acquisition Bad Pixel Table) The Space Telescope Imaging Spectrograph (CCD) was used to make dark calibration images in order to update the acquisition bad pixel table. Daily hot pixel lists can also be used for science data analysis. The observations were executed as scheduled, and no anomalies were noted. 1.3 Completed NIC/2 7420 (A Near-Infrared Search for Very Low Mass Companions to Stars Within 10 Parsecs of the Sun) The Near Infrared Camera (Camera Two) was used to make searching observations for very low mass companions to variable star HD109358. This star is known to be within 10 parsecs of the Sun. The observations were executed as scheduled, and no anomalies were noted. 1.4 Completed Two Sets of NIC/2 7331 (Near-IR Properties of the Bulges of Spiral Galaxies) The Near Infrared Camera (Camera Two) was used to make infrared observations of the bulge in spiral galaxy NGC-4102. Near-IR data at HST resolution are essential for correcting for the effect of dust and will enable us to derive robust nuclear properties for the sample. The observations were executed as scheduled, and no anomalies were noted. 1.5 Completed NIC/2/3 7280 (Structures and Colors of the Oldest Galaxies at Redshift 1.5) The Near Infrared Camera (Cameras #2 and #3) was used to make observations of the structure and color of the oldest radio galaxies 53W091 which is located at a redshift of 1.5. This is the first high-redshift galaxies for which detailed studies of stellar populations have proved possible. The observations were executed as scheduled, and no anomalies were noted. 1.6 Completed Two Sets of WF/PC-2 6253 (Pure Parallel Archive Program) The WF/PC-2 was used to execute a pure parallel program taking ultraviolet observations running concurrently with prime science observations. The intent is to search for extra-galactic sources with flux excesses at 3000 A0 and galactic sources with excesses at 1600 A0. The observations were completed as planned, and no problems were reported. 1.7 Completed WF/PC-2 6792 (Planetary Nebulae With Supporting Infrared Data) The WF/PC-2 was used to make observations of the planetary nebula NGC-6210. Recent work has shown that nebular abundances derived from recombination lines are up to a factor of five larger than those obtained from the traditional optical/UV collisionally excited lines. The observations were executed as scheduled, and no anomalies were reported. 1.8 Completed Four Sets of NIC/1/2/3 7726 (NICMOS One Orbit Parallel) The Near Infrared Camera (Cameras One, Two and Three) was used to make a one orbit parallel calibration observations. The observations were executed as scheduled, and no anomalies were noted. 1.9 Completed Four Sets of STIS/CCD 7781 (STIS Non-Scripted Parallel Archive Proposal - Full Orbit) The Space Telescope Imaging Spectrograph (MA2) was used for a non-scripted parallel archive proposal (One full orbit). No details were given. The observations were executed as scheduled, and no anomalies were noted. 1.10 Completed Two Sets of STIS/CCD 7782 (STIS Non-Scripted Parallel Archive Proposal - Half Orbit) The Space Telescope Imaging Spectrograph (CCD) was used for a non-scripted parallel archive proposal (One-half orbit). The observations were executed as scheduled, and no anomalies were noted. 1.11 Completed WF/PC-2 6744 (Fundamental Properties of the Pulsar/White-Dwarf Binary PSR B1855+09) The WF/PC-2 was used to make observations of the pulsar/white-dwarf, binary STAR-18573 (a.k.a., PSR B1855+09) in order to study its fundamental properties. It is the only one for which the Shapiro delay of the pulsed signal has yielded an accurate mass determination of the white dwarf, and it is the only pulsar for which a parallax has been measured. The observations were completed as planned, and no problems were reported. 1.12 Completed WF/PC-2 6431 (Determination of the Extragalactric Distance Scale) The WF/PC-2 was used to make observations of the galaxy NGC-1326 to be used in measuring the periods of Cepheid variable stars within this galaxy. This will allow for a more accurate estimate of the distances to these galaxies through the period-luminosity relation for the Cepheid stars. The observations were executed as scheduled, and no anomalies were noted. 1.13 Completed Three Sets of NIC/1/2/3 7729 (NICMOS Short One Orbit Parallel) The Near Infrared Camera (Cameras One, Two, and Three) was used to obtain "JHK" imaging of sky regions while another instrument was prime. These observations were part of the short NICMOS one-orbit parallel program. The observations were executed as scheduled, and no anomalies were noted. 1.14 Completed NIC/1/2/3 7328 (High Resolution IR Imaging Survey (IRIS) of the Centers of the Nearest Active Galaxies) The Near Infrared Camera (Camera One, Two and Three) was used to make high resolution infrared observations of the nearest active galaxy Markarian IC4870 in order to study its inner nuclear region. Observing in the near-IR minimizes the dust obstruction and maximizes sensitivity to the old stellar population which dominates the mass. The observations were executed as scheduled, and no anomalies were noted. 1.15 Completed WF/PC-2 6693 (Curcumstellar Nebulae as Fossil Records of the Mass Loss History) The WF/PC-2 was used to make images of the curcumstellar nebula surrounding the luminous blue variable star HD168625 in order to study the fossil records of its mass loss history. The observations were completed as scheduled and no anomalies were reported. 1.16 Completed NIC/1/2/3 7775 (NICMOS Earth Flats) The Near Infrared Spectrograph Multi-Object Camera (NICMOS) was used to make Earth flat calibration observations. This proposal obtains a series of Earth flats for a subset of narrow-, medium-and broad-band NIC 1, 2 and 3 filters. These flats will be used to generate the master flats for narrow-band filters and to determine the OTA illumination pattern as a function of wavelength and camera. The observations were completed as scheduled, and no problems were noted. 1.17 Completed NIC/1/2 7691 (Photometric Zero Point Calibration) The Near Infrared Camera (Cameras One and Two) was used to perform a photometric zero point calibration. Standard star G191B2B-CA was observed NIC/1 & NIC/2 filters to obtain the zero point flux for the set of filters. A dark calibration image was also taken. The observations were completed as planned, and no anomalies were reported. 2.0 FLIGHT OPERATIONS SUMMARY: 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 10 Successful : 10 Scheduled Reacquisitions : 07 Successful : 07 2.2 FHST Updates: Scheduled : 20 Successful : 20 2.3 Operations Notes: An STIS MCE-1 reset occurred outside of the South Atlantic Anomaly Zone at 219/0430Z. The NSSC-I Status Buffer was received indicating that the STIS CS FSW Error Counter, STIS MAMA-1 MCE Reset Counter, and the STIS MAMA-1 Threshold Voltage were out-of-limits. STIS MAMA-1 Low Voltage was on at the time of the reset. The Moses SE notified. The STIS Fight Software Error Counter was reset at 218/0652Z The Solid State Tape Recorder Interrupt log was dumped at 218/1150Z The STIS MAMA MCE-1 was recovered successfully at 218/1854Z. The STIS Bad Pixel Table was successfully uplinked at 218/2229Z 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /DMH