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HUBBLE SPACE TELESCOPE

DAILY REPORT #2562

PERIOD COVERED: 0000Z (UTC) 02/16/00 - 0000Z (UTC) 02/17/00

Daily Status Report as of 048/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed WF/PC-2 8212 (Reconciling the SBF and SNIa Distance Scales)

The WF/PC-2 was used to make observations of the galaxy NGC-2258 in
order to reconcile the surface brightness fluctuation (SBF) and super novae
type IA (SNIa) distance scales. It is imperative that we understand the
discrepancy between the SBF and SNIa methods. The observations were
completed as scheduled, and no anomalies were reported.

1.2 Completed Four Sets of STIS/CCD 8549 (POMS Test Proposal:
Non-Scripted Parallel Proposal Continuation I)

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.

1.3 Completed STIS/CCD 8439 (Bias Monitor-Part 2 C8)

The Space Telescope Imaging Spectrograph (CCD) was used 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 track the evolution of hot
columns. The proposal completed with no reported problems.

1.4 Completed Three Sets of WF/PC-2 8460 (Cycle 8 Supplemental Darks pt2/3)

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 completed with no reported problems.

1.5 Completed STIS/CCD 8437 (Dark Monitor-Part 2 C8)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the darks. The proposal completed nominally.

1.6 Completed 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.

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

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of HCLQ1431+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.

1.8 Completed STIS/CCD 8286 (Absolute Proper Motions of Nearby Dwarf
Spheroidal Galaxies)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the absolute proper motions of the nearby dwarf spheroidal
galaxy UMI-QSO-15. HST is essential to achieving the high precision needed
to conclusively compare the projected orbital motions of the individual
galaxies. Even with our conservative uncertainties, we are competitive
with the best ground-based efforts with only a two year baseline. The
observations were completed as scheduled, and no anomalies were reported.

1.9 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.

1.10 Completed Two Sets of WF/PC-2 8436 (POMS Test Proposal: WFII
Backup Parallel Archive Proposal II)

The WF/PC-2 was used to make archive observations parallel to the
prime science observations as part of a POMS test proposal. This is a POMS
test proposal designed to simulate scientific plans. The observations were
completed as planned, and no anomalies were reported.

1.11 Completed STIS/CCD/MA1 8511 (Full-field Sensitivity and Geometry)

The Space Telescope Imaging Telescope (CCD and MA1) was used to
measure the geometric distortion for each STIS detector, using the same
field as previously used for measuring the MAMA geometric distortion in
cycle 7. These exposures will also serve to measure the image location for
each of the MAMA imaging modes, with respect to the CCD frame, In order to
fix the detector coordinates for the STIS MAMA imaging modes with respect
to the CCD coordinates, and hence to the FGS system. The proposal
completed nominally.

1.12 Completed Two Sets of WF/PC-2 8445 (WF/PC-2 Cycle 8 Earth Flats)

The WF/PC-2 was used to make Cycle 8 Earth flat calibration
observations. This is to obtain sequences of earth streak flats to
construct high quality flat fields for the WF/PC-2 filter set. The
observations were executed as scheduled, and no anomalies were noted.

1.13 Completed WF/PC-2/STIS/MA1/MA2 7410 (Deep UV Imaging of the Hubble
Deep Field)

The WF/PC-2 was used to make ultraviolet observations of Hubble
Deep Field HDF-STIS-P. The observations will extend the searches for Lyman
break galaxies to B~ 29, two magnitudes fainter than possible with the
existing HDF data and more than four magnitudes fainter than the current
limit of ground-based spectroscopy. The observations were executed as
scheduled, and no anomalies were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 10
Successful: 10

Scheduled Re-acquisitions: 3
Successful: 3

2.2 FHST Updates:
Scheduled: 26
Successful: 26

2.3 Operations Notes:

Servicing Mission Observatory Verification (SMOV) is continuing
with operations being performed on CCR string "A".

Using ROP SR-1A, the SSR EDAC error counter was rest once.

At 047/115537Z, the Coarse Sun Sensor #1 temperature (GCSS1T)
flagged out-of-limits for one telemetry sample with a value of
-45.0897. HSTAR 7508 was written.

The SSR pointer was set at 048/0140Z as directed by ROP SR-3.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of SMOV and normal science observations and calibrations.

/CAW