HUBBLE SPACE TELESCOPE

       DAILY REPORT #2491

PERIOD COVERED:  0000Z (UTC) 11/01/99 - 0000Z (UTC) 11/02/99

Daily Status Report as of 306/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

     1.1 Completed STIS/MA1 8211 (An Ultraviolet Census of Counterparts to 
Highly Luminous X-ray Sources in M31 Globular)

        The Space Telescope Imaging Spectrograph (MA1) was used to make 
ultraviolet observations of highly luminous x-ray sources in globular 
clusters in the Andromeda galaxy (a.k.a., NGC-224).  The cores of certain 
globular clusters in our Galaxy contain some of the most extraordinary 
stars known, identified by their intense, near-Eddington limited X-ray 
emission.  The observations were executed as scheduled, and no anomalies 
were noted.

    1.2 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.

    1.3 Completed 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.

    1.4 Completed Four Sets of WF/PC-2 8442 (WF/PC-2 Cycle 8 Standard Darks)

        The WF/PC-2 was used to make a series of Cycle 8 standard dark 
calibration observations.  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.

    1.5 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.

    1.6 Completed WF/PC-2 8160 (The Optical Counterpart of the Soft 
Gamma-Ray Repeater 1900+14)

        The WF/PC-2 was to be used to make observations of NGC-104 to 
search for the optical counterpart of the soft gamma-ray repeater 
1900+14.  As described in HSTAR 7335 and yesterday's report, the 
acquisition for this proposal failed, the take data flag remained down, and 
all observations were lost.

    1.7 Completed STIS/CCD 7912 (STIS Parallel Archive Proposal - Nearby 
Galaxies - Imaging and Spectroscopy)

        The Space Telescope Imaging Spectrograph (CCD) was to be used to 
make parallel observations of nearby galaxies.  As described in HSTAR 7335 
and yesterday's report, the acquisition for this proposal failed, the take 
data flag remained down, and eleven observations were lost.

    1.8 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.  As described in HSTAR 7335 and yesterday's report, the acquisition 
for the first iteration of this proposal failed, the take data flag 
remained down, and all observations were lost.  Otherwise, the observations 
were completed as planned, and no further problems were reported.

    1.9 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.

    1.10 Completed WF/PC-2 8396 (WF/PC-2 Observations of Astrophysically 
Important Visual Binaries - Continued)

        The WF/PC-2 was used to make observations of the visual binary star 
Procyon.  We recently used WF/PC-2 images of Procyon A and B to measure an 
extremely accurate separation of the bright F star and its much fainter 
white-dwarf companion.  The observations were completed as planned, and no 
anomalies were reported.

    1.11 Completed Two 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.

    1.12 Completed Three Sets of STIS/CCD 8411 (STIS CCD Spectroscopic 
Flats C-8)

        The Space Telescope Imaging Spectrograph (CCD) was used to obtain 
CCD flats in the spectroscopic mode.  The observations were completed as 
scheduled, and no anomalies were reported.

    1.13 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 PK074+02D1.  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.

    1.14 Completed Two Sets of STIS/CCD 8202 (Bright Quasar Close Lensing 
Search)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of HCLQ2332-0 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.

    1.15 Completed STIS/CCD/MA1 7292 (Measurement of the Cosmological 
Baryon to Photon Ratio)

        The Space Telescope Imaging Spectrograph (CCD and MA1) was used to 
make observations of PG1718+481 in order to study its cosmological barion 
to proton ratio.  The primordial D/H ratio is the most sensitive measure of 
the baryon to photon ratio, a fundamental cosmological number with wide 
ranging uses.  A wavelength calibration image was also taken.  The 
observations were completed as planned, and no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions:  9
Successful:  9

  Scheduled Re-acquisitions:  7
Successful:  7

    2.2 FHST Updates:
Scheduled: 22
Successful: 22

    2.3 Operations Notes:

        The SSR EDAC error counter was cleared three times per ROP SR-1.

        The NICMOS FPA temperature sensor for detector 2 was enabled at 
305/1218Z.

        A TTR was written for a line outage which resulted in a loss of 
engineering data from 305/154500Z until 305/154853Z.  The SSR was 
subsequently re-dumped in order to recover the missing data.  EDP 
successfully collected the data, but CCS did not.  HSTAR 7337 covers this 
failure.

        The ground system is processing inputs for target of opportunity 
observations, using the STIS/MAMA, for the latter part of the week.  These 
observations, if instituted, will investigate SN1999em in NGC1637.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW