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HUBBLE SPACE TELESCOPE

DAILY REPORT #2489

PERIOD COVERED: 0000Z (UTC) 10/28/99 - 0000Z (UTC) 10/29/99

Daily Status Report as of 302/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed 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 STIS/MA1/MA2 8144 (UV Spectroscopic Snapshots of FUSE AGN
Targets)

The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was
used to make far ultraviolet spectrographic snapshot observations of the
FUSE AGN target HS1700+641. This object is currently scheduled to be
observed by the Far Ultraviolet Spectroscopic Explorer {FUSE}. The
observations were executed as scheduled, and no anomalies were noted.

1.3 Completed WF/PC-2 8444 (WF/PC-2 CYCLE-8 Internal Monitor)

The WF/PC-2 was used to make a bias, and an internal flat,
observation as part of a Cycle-8 monitoring program to monitor the health
of the cameras. A variety of internal exposures are obtained in order to
provide a monitor of the integrity of the CCD camera electronics in both
bays {gain 7 and gain 15}, a test for quantum efficiency in the CCDs, and a
monitor for possible buildup of contaminants on the CCD windows. The
observations were executed as scheduled, and no anomalies were noted.

1.4 Completed STIS/MA1/MA2 7436 (A Complete Sample of Hot Post-AGB
Stars in Globular Clusters)

The Space Telescope Imaging Spectrograph (CCD/MA1/MA2) was used to
make observations of the globular cluster NGC-104. Recent observations
with the Ultraviolet Imaging Telescope have provided a complete sample of
the hot post asymptotic giant branch {post-AGB} population in fourteen
globular clusters. A wavelength calibration image was also taken. The
observations were completed as planned, and no anomalies were reported.

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

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of HCLQ1233+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.

1.7 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.

1.8 Completed WF/PC-2 7503 (Precise Astrometry in the Core of the
Globular Cluster 47 Tuc: A Complete Census of High-Velocity Stars)

The WF/PC-2 was used to make astrometric observations of high
velocity stars in the core region of the Globular Cluster 47-Tuc (a.k.a.,
NGC-104). If more progress is to be made in the search for high-velocity
stars in 47-Tuc, it must be made by obtaining proper motions, a task for
which only HST is suitable. The observations were executed as scheduled,
and no anomalies were noted.

1.9 Completed 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.

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

The Space Telescope Imaging Spectrograph (CCD) was used to make
parallel observations of nearby galaxies. This survey will be useful to
study the star formation histories, chemical evolution, and distances to
these galaxies. These data will be placed immediately into the Hubble Data
Archive. The observations were completed as scheduled, and no problems
were reported.

1.11 Completed Two Sets of STIS/CCD 8545 (POMS Test Proposal: STIS
non-scripted parallel proposal continuation VI)

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

1.12 Completed WF/PC-2 8332 (A Snapshot Survey of Symbiotic Stars)

The WF/PC-2 was used to make observations of the star AS201 as part
of a snapshot survey of symbiotic stars. A fuller understanding of the
symbiotic star phenomenon is important to several branches of present day
astrophysics including mass loss, accretion onto compact objects, and
photoionization and radiative transfer in gaseous nebulae. The
observations were completed as planned, and no anomalies were reported.

1.13 Completed 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.

1.14 Completed STIS/CCD 8246 (The Youngest Massive Star Clusters in the
SMC as Clues to Star Formation in the Early Universe)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations the young massive star cluster SMC-N81 that is located in the
Small Magellanic Cloud. These are the youngest massive stars accessible to
direct observations at ultraviolet and optical wavelengths. A wavelength
calibration image was also taken. The observations were executed as
scheduled, and no anomalies were noted.

1.15 Completed STIS/CCD/MA1 7295 (Galaxy Rotation Curves at Large
Radius using Lyman-alpha Absorption Lines)

The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make rotational spectrographic observations of the galaxy MARK110. This is
to investigate the outer rotation curves of eight spiral galaxies at very
large galactocentric radii by using the kinematical information from
Lyman-alpha absorption lines in the spectra of background quasars. The
observations were executed as scheduled, and no problems were reported.

1.16 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.

1.17 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 HD30122 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: 7
Successful: 7

The acquisition at 302/003808Z required three attempts to acquire
fine lock. QDVEFGS1 was out-of-limits high at 136.325. The take data flag
cam up at 302/004102Z. The subsequent re-acquisition proceeded
nominally. HSTAR 7330 was written.

Scheduled Re-acquisitions: 9
Successful: 9

2.2 FHST Updates:

Scheduled: 16
Successful: 16

As documented in HSTAR 7329, the FHST map scheduled for 301/094200Z
failed when no stars were found in FHST-2.

2.3 Operations Notes:

The flight operations team returned to the STOCC area from the
Building 23 back-up facility upon the conclusion of the two Joint
Integrated Simulations conducted this week.

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

The NSSC-1 status buffer was bumped at 301/1638Z per ROP NS-3.

A TTR was written for multiple access return link dropout from
301/182554Z until 301/182639Z. The reason for the failure is unknown. The
data lost during the period is unrecoverable.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH