HUBBLE SPACE TELESCOPE

       DAILY REPORT #2497

PERIOD COVERED:  0000Z (UTC) 11/09/99 - 0000Z (UTC) 11/10/99

Daily Status Report as of 314/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 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.

    1.2 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.

    1.3 Completed WF/PC-02 8131 (HST Imaging of Moderate Redshift X-ray 
Emitting Groups of Galaxies)

        The WF/PC-2 was used to make observations of the infrared and x-ray 
emitting galactic cluster Gal-Clus-1.  Most galaxies in the universe, 
including our own Milky Way, are members of poor groups of 
galaxies.  Recent optical and X- ray observations of nearby groups have 
revealed considerable new insight into these important systems.  The 
observations were completed as scheduled, and no problems were reported.

    1.4 Completed STIS/CCD 8409 (CCD Bias Monitor C8)

        The Space Telescope Imaging Spectrograph (CCD) was used to monitor 
the bias in the 1x1, 1x2, 2x1, and 2x2 bin settings at gain=1, and 1x1 at 
gain = 4 in order to build up high-S/N superbiases and track the evolution 
of hot columns.  The observations completed with no problems.

    1.5 Completed Three Sets of STIS/CCD 8549 (POMS Test Proposal: STIS 
Non-scripted Parallel Proposal Continuation III)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
high galactic latitude observations as part of a non-scripted POMS Test 
Proposal. The observations were completed as scheduled, and no problems 
were reported.

    1.6 Completed WF/PC-2 8307 (Morphology of High Radio Surface Brightness 
Planetary Nebulae)

        The WF/PC-2 was used to make observations of the high radio surface 
of the planetary nebula PK057-01D1.  The morphological transformation from 
the spherically symmetric circumstellar envelopes of AGB stars to the 
complex, bipolar structures of planetary nebulae has remained one of the 
major unresolved problems in the late stages of stellar evolution.  The 
observations were completed as planned, and no problems were reported

    1.7 Completed WF/PC-2 8175 (A Survey of Gravitational Lenses as 
Cosmological Tools III)

        The WF/PC-2 was used to make observations of the gravitational lens 
system APM08279+5.  Gravitational lenses are powerful tools for studying 
cosmology, galactic structure, and galaxy evolution.  The observations were 
completed as planned, and no anomalies were reported.

    1.8 Completed STIS/MA1/MA2 8424 (MAMA Sensitivity and Focus Monitor C8)

        The Space Telescope Imaging Spectrograph (MA1/MA2) was used to make 
observations of object GRW+70D582 in order to measure the sensitivity and 
to focus monitor C8.  This also is to monitor sensitivity of each MAMA 
grating mode to detect any change due to contamination or other causes, and 
to monitor the STIS focus in a spectroscopic mode.  A wavelength 
calibration was also taken.  The observations were completed as planned, 
and no anomalies were reported.

    1.9 Completed Two Sets of STIS/MA2 8426 (Cycle 8 MAMA Dark Measurements)

        The Space Telescope Imaging Spectrograph (MA2) was used to make a 
routine Cycle-8 MAMA dark noise calibration measurement.  This proposal 
will provide the primary means of checking on the health of the MAMA 
detectors.  This is done through frequent monitoring of the background 
count rate.  The observations were completed as planned, and no problems 
were reported.

    1.10 Completed STIS/CCD/MA1 8125 (Primordial Low-Z LyAlpha Clouds 
Toward PKS 2155-304)

        The Space Telescope Imaging Spectrograph (CCD/MA1) was used to 
study PKS 2155-304, a key FUSE target, which contain a cluster of strong 
LyAlpha absorbers.  The combination of a bright target and high-N_HI 
absorbers make this an ideal situation for studying metals in LyAlpha 
clouds.  These clouds have the potential for being the most metal-free gas 
ever studied.  The observations completed with no reported problems.

    1.11 Completed Two Sets of 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.

    1.12 Completed STIS/CCD/MA1 8241 (A Snapshot Survey of Interstellar 
Absorption Lines)

        The Space Telescope Imaging Spectrograph (CCD and MA1) was used to 
make high resolution Echelle spectrographic observations of the standard 
ultraviolet star HD195455 as part of a snapshot survey of interstellar 
absorption lines.  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 Re-acquisitions: 11
Successful: 11

    2.2 FHST Updates:
Scheduled: 13
Successful: 13

    2.3 Operations Notes:

        Using ROP SR-1, the SSR EDAC error counter was cleared three times.

        The STIS flight software error counter was cleared at 314/0617Z as 
directed by ROP NS-12.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW