HUBBLE SPACE TELESCOPE

       DAILY REPORT #2492

PERIOD COVERED:  0000Z (UTC) 11/02/99 - 0000Z (UTC) 11/03/99

Daily Status Report as of 307/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 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.

    1.2 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 Two 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.

    1.4 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 B01 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.

    1.5 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.

    1.6 Completed STIS/MA1 8426 (Cycle 8 MAMA Dark Measurements)

        The Space Telescope Imaging Spectrograph (MA1) 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.

    1.7 Completed WF/PC-2 8345 (Multipolar Bubbles and Jets in Very Low 
Excitation Planetary Nebulae - A WF/PC-2 H-Alpha Imaging Survey)

        The WF/PC-2 was used to make H-Alpha observations of the very low 
excitation planetary nebula PK058-10D1 in order to study its multipolar 
bubbles and jets.  Comparison of the morphology of this young PNe sample 
with more evolved PNe populations will set new constraints on models for 
the production of jet-like outflows and nebular evolution.  The 
observations were completed as planned, and no problems were reported.

    1.8 Completed STIS/CCD 8549 (POMS Test Proposal: STIS non-scripted 
parallel proposal continuation III)

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

    1.9 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 PK089-05D.  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.

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

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of HCLQ0743+3 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.

    1.11 Completed WF/PC-2 6556 (Rest-Frame Ultraviolet Imaging of Normal 
Galaxies at High Redshifts)

        The WF/PC-2 was used to make observation of Field-2217 in order to 
study the rest-frame of ultraviolet imaging of normal galaxies at high 
redshifts.  This is to study the evolution of normal galaxies over the last 
two-thirds of the age of the Universe through HST imaging of fields from 
our deep redshift surveys.  The observations were executed as scheduled, 
and no anomalies were noted.

    1.12 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.

    1.13 Completed Two Sets of WF/PC-2 8230 (Snapshot Survey of Dynamically 
Close Galaxy Pairs from z=0.1 to z=0.5)

        The WF/PC-2 was used to make snapshot survey observations of 
galactic cluster Gal-Clus-2723.  This is to obtain snapshot images of a 
large, well-defined, and dynamically selected sample of close galaxy pairs 
at moderate redshift.  The observations were executed as scheduled, and no 
anomalies were noted.

    1.14 Completed STIS/MA1 8316 (The Lyman-Alpha Absorption Cross-Section 
of Nearby Galaxies)

        The Space Telescope Imaging Spectrograph (MA1) was used to study 
the Lyman-Alpha absorption cross-section of nearby galaxy MCG10.16.1.  The 
high resolution of the spectra will allow us to accurately determine the 
velocity of the gas, which can be compared to the systemic velocity of the 
galaxy, and to the velocity field determined from 21 cm H-I emission 
measurements, when available, enabling us to determine if or how the gas is 
kinematically tied to the galaxy.  A wavelength calibration image was also 
taken.  The observations were executed as scheduled, and no anomalies were 
noted.

    1.15 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.

    1.16 Completed 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.

    1.17 Completed STIS/CCD 7310 (The Interaction of Accretion Disks with 
Protostellar Binaries)

        The Space Telescope Imaging Spectrograph (CCD) was used to study 
the interaction of the accretion disk with the protostellar binary system 
UZ-Tau.  This should determine how the accretion disk interacts with stars 
in young binary systems and will measure the rates that mass accumulates 
onto each component of the pair.  The observations were executed as 
scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 8
Successful: 8

  Scheduled Re-acquisitions: 4
Successful: 4

    2.2 FHST Updates:
Scheduled: 18
Successful: 18

    2.3 Operations Notes:

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

        A successful SSR engineering re-dump, necessitated by the events 
described in HSTAR 7337 (yesterday's report), was performed at 306/2335Z.

        The STIS MCE-1 reset at 307/093354Z while the low voltage was on 
and while outside any SAA interval.  The STIS flight software error counter 
was reset at 307/0957Z, using ROP NS-12.  MAMA-1 will be recovered at 
307/1625Z, the time of the next high voltage turn-on, via normal SMS 
commanding.

        The target of opportunity SMS has been received from the STScI, and 
is being reviewed.  If approved, this load is scheduled to be uplinked on 
day 308.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW