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HUBBLE SPACE TELESCOPE

DAILY REPORT #2433

PERIOD COVERED: 0000Z (UTC) 08/10/99 - 0000Z (UTC) 08/11/99

Daily Status Report as of 223/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 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
nebulae LMC-SMP-81 located in the Large Magellanic Cloud to study the parallel
evolution of the nebulae and its central star. The observations were completed
as planned, and no problems were reported.

1.2 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.

1.3 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.

1.4 Completed Three Sets of STIS/CCD 8202 (Bright Quasar Close Lensing
Search)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of HCLQ1643+3, HCLQ0138-3 and HCLQ1459+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.

1.5 Completed Three 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, and no
anomalies 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.
Observations were made of standard star GRW+70D582. 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 WF/PC-2 6788 (The Main Sequence Luminosity Function of Palomar
5)

The WF/PC-2 was used to make observations of Palomar5 in order to study
its main sequence luminosity function. Palomar 5 appears to represent an
extreme in the dynamical evolution of globular clusters. The observations were
executed as scheduled, and no anomalies were noted.

1.8 Completed STIS/MA1/MA2 8426 (Cycle 8 MAMA Dark Measurements)

The Space Telescope Imaging Spectrograph (MA1 and 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.

1.9 Completed STIS/MA2 8275 (Ultraviolet Snapshots of 3CR Radio Source
Counterparts at Low Z)

The Space Telescope Imaging Spectrograph (MA2) was used to make
ultraviolet snapshot observations of the radio galaxy 3C390.0. Radio galaxies
are an important class of extragalactic objects, representing one of the most
energetic astrophysical phenomena, while extraordinarily useful as probes of
their environments and of the early Universe. The observations were completed
as scheduled, and no anomalies were reported.

1.10 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.

1.11 Completed STIS/CCD 7438 (Spatially-Resolved Spectroscopy of the UVX in
Elliptical Galaxies)

The Space Telescope Imaging Spectrograph (CCD) was used to make
spatially resolved far-ultraviolet observations of the large elliptical galaxy
NGC-221. The prominent far-UV upturn {UVX} in the spectra of elliptical
galaxies originates from stars in their old populations which have evolved
beyond the He-flash at the tip of the red giant branch. A wavelength
calibration image was also taken. The observations were completed as
scheduled, and no anomalies were reported.

1.12 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.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions: 9
Successful: 9

Scheduled Reacquisitions: 7
Successful: 7

2.2 FHST Updates:

Scheduled: 24
Successful: 23

The update scheduled for 223/021301Z failed.

2.3 Operations Notes:

The Flight Operations Team returned to the STOCC area at 222/2215Z from
the SAMS back-up facility upon the conclusion of Joint Integrated Simulation
#4.

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

The NICMOS FPA temperature sensor for detector 1 was enabled at
223/0512; for detector 3, at 223/0619Z.

The first portion of the Lunar/Solar Eclipse Procedure (ROP PS-2) has
been executed in preparation for the solar eclipse expected between 223/1351Z
and 223/1428Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH