HUBBLE SPACE TELESCOPE

       DAILY REPORT #2493

PERIOD COVERED:  0000Z (UTC) 11/03/99 - 0000Z (UTC) 11/04/99

Daily Status Report as of 308/0000Z

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 the highly luminous x-ray sources in globular 
cluster B03 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 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.

    1.3 Completed STIS/CCD 8228 (The Black Hole Versus Bulge Mass 
Relationship in Spiral Galaxies)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of the galaxy NGC-0157 in order to study the black hole versus 
bulge mass relationship in spiral galaxies.  A wavelength calibration image 
was also taken.  The observations were executed as scheduled, and no 
anomalies were noted.

    1.4 Completed Four Set 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.

    1.5 Completed FGS 8102 (FGS Astrometry of the Extrasolar Planet of GL876)

        The Fine Guidance Sensors were used to make astrometric 
observations of a extrasolar planet which is orbiting the M4 class dwarf 
star GL876.  This will help determine the planet's mass.  The observations 
were completed as planned, and no problems were reported.

    1.6 Completed Three Sets of WF/PC-2 8441 (WF/PC-2 Decontaminations and 
Associated Observations Pt. 1/2)

        The WF/PC-2 was used to make its monthly decontamination 
operations.  Also included are instrument monitors tied to decons: 
photometric stability check, focus monitor, pre- and post-decon internals 
{bias, internal flats, k-spots, and darks}, and ultraviolet throughput 
checks.  The observations were executed as scheduled, and no anomalies were 
noted.

    1.7 Completed STIS/CCD 8202 (Bright Quasar Close Lensing Search)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of HCLQ2159-4 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.

    1.8 Completed WF/PC-2 7468 (Young Globular Clusters in Merger Remnants 
-- Part 4)

        The WF/PC-2 was used to make observations of merging galaxy 
NGC-3601 to study its globular clusters.  Mergers seem to have played a 
major role in determining the shapes and dynamics of E and S0 
galaxies.  The observations were executed as scheduled, and no anomalies 
were noted.

    1.9 Completed STIS/CCD 8545 (POMS Test Proposal: STIS non-scripted 
parallel proposal continuation VI)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
High galactic latitude, non-scripted parallel observations as part of a 
POMS test proposal.  The observations were completed as planned, and no 
anomalies were reported.

    1.10 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.

    1.11 Completed STIS/MA2 8429 (Cycle 8 Plate Scale Verification)

        The Space Telescope Imaging Spectrograph (MA2) was used to conduct 
a Cycle-8 plate scale calibration verification. The calibration was 
completed as scheduled, and no anomalies were reported.

    1.12 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.

    1.13 Completed WF/PC-2 8398 (Saturn's Rings)

        The WF/PC-2 was used to make observations of the rings around the 
planet Saturn.  Saturn's rings are a unique dynamical laboratory and 
continue to present challenging problems that require additional data to 
attack.  The observations were executed as scheduled, and no anomalies were 
noted.

    1.14 Completed WF/PC-2/STIS/CCD/MA1/MA2 8207 (The Ofpe/WN Stars In M33: 
Understanding Wolf-Rayet Star Formation In Different Environments)

        Both WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD, MA1 
and MA2) were used to make observations of the Wolf-Rayet star UIT003 that 
is located in the galaxy M-33.  WF/PC-2 imaging parallel to the primary 
spectroscopy in UBV and FUV filters will substantially extend our study of 
the hot massive star population and populous stellar clusters in this 
galaxy.  A wavelength 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:  7
Successful:  7

  Scheduled Re-acquisitions: 10
Successful: 10

    2.2 FHST Updates:
Scheduled: 10
Successful: 10

    2.3 Operations Notes:

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

        The SSR playback pointer was set at 307/1557Z per ROP SR-3.

        A TTR was written for a period, starting at 307/2349Z, when there 
was an inability to lock onto data in the coherent mode.  Recovery 
procedures were unsuccessfully attempted four times.  As a result, there 
was an 18-minute, 27-second period of non-recoverable 32k engineering data.

        The approved loads for the target of opportunity will be uplinked 
later today.  The added proposals, STIS 8243 and STIS 8112, will observe 
SN199em in NGC1637.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW