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HUBBLE SPACE TELESCOPE

DAILY REPORT #2438

PERIOD COVERED: 0000Z (UTC) 08/17/99 - 0000Z (UTC) 08/18/99

Daily Status Report as of 230/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 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.

1.2 Completed WF/PC-2 8181 (Resolving Sirius-like Binaries)

The WF/PC-2 was used to make observations of the star REJ1309-08 in
order to try and resolve these Sirius-like binary star systems. Subsequent
determinations of the visual orbits of the resolved binaries with the HST will
provide dynamical measurements of the white-dwarf masses. The observations
were completed as scheduled, and no anomalies were reported.

1.3 Completed Four Sets of STIS/CCD 8406 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation V)

The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude observations taken in parallel with the prime science
observations as part of a POMS proposal. This is a STIS non-scripted parallel
Condition V proposal. The observations were completed as scheduled with no
anomalies.

1.4 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 with no anomalies.

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

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of HCLQ1417-1 and HCLQ0347-4 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 with no anomalies.

1.6 Completed FGS 8309 (A Link Between Massive Binary Stars and Non-thermal
Radio Emission)

The Fine Guidance Sensors were used to make astrometric observations of
the massive Wolf-Rayet binary star WR22 and several nearby reference stars.
Non-thermal radio emission in Wolf-Rayet stars is explained in terms of
synchrotron emission from shocks in the stellar wind. The observations were
executed as scheduled, and no anomalies were noted.

1.7 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.

1.8 Completed WF/PC-2 8020 (Tracking the UV Upturn to z=0.55)

The WF/PC-2 was used to make ultraviolet observations of galactic
cluster CL0016+16. The high concentration of elliptical galaxies in this
cluster, when combined with its large distance, allows the observation of 10
ellipticals in the relatively small field-of-view. The observations were
completed as planned, and no problems were reported.

1.9 Completed 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 WF/PC-2 6671 (Deep V, I Photometry for 20 M31 Globular
Clusters)

The WF/PC-2 was used to make deep photometry observations (V=27.5) of
the globular cluster M-31- G64 which is located in the Andromeda Galaxy
(a.k.a., M-31). The observations were executed as planned, and no problems
were reported.

1.11 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.

1.12 Completed STIS/CCD 8080 (STIS Spectroscopic CCD Flatfielding --
Revised)

The Space Telescope Imaging Spectrograph (CCD) was used to make CCD flat
fielding calibration observations in the spectroscopic mode. The observations
were completed as planned, and no anomalies were reported.

1.13 Completed STIS/CCD 8470 (POMS Test Proposal: STIS Non-Scripted Parallel
Proposal Continuation V)

The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude observations taken in parallel with the prime science
observations as part of a POMS proposal. This is a STIS non-scripted parallel
Condition VI proposal. The observations were completed as scheduled, and no
anomalies were reported.

1.14 Completed STIS/CCD 8271 (A Snapshot Survey of LMC Planetary Nebulae: A
Study of Nebular and Late Stellar Evolution)

The Space Telescope Imaging Spectrograph (CCD) was used to make
medium-resolution slitless spectroscopy snapshot images of the planetary nebula
LMC-SMP-30 that is located in the Large Magellanic Cloud to study the parallel
evolution of the nebulae and their central stars. The observations were
completed as planned, and no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions: 11
Successful: 11
Scheduled Re-acquisitions: 8
Successful: 8

2.2 FHST Updates:

Scheduled: 23
Successful: 23

2.3 Operations Notes:

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

The NICMOS FPA temperature sensor for detector 2 was enabled at
230/0121Z; for detector 3, at 230/0130Z.

There was a STIS EMC retry at 230/084904Z, along with a corresponding
status buffer error message. ROP NS-12 was executed at 230/085621Z to clear
the error.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH