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HUBBLE SPACE TELESCOPE

DAILY REPORT #2542

PERIOD COVERED: 0000Z (UTC) 01/18/00 - 0000Z (UTC) 01/19/00

Daily Status Report as of 019/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed WF/PC-2 8491 (Transition to Hold, Decon and Cool Down
Procedure)

This program covers the transition from Protect Safe Mode to Hold
Mode, then performs a Protect Decontamination. This is followed by a series
of UV monitors and focus checks at -43C, then a special decon to take the
instrument to -88C. The program completed nominally.

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 STIS/CCD 8409 (CCD Bias Monitor 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 in order to build up high-S/N superbiases and track the evolution
of hot columns. The observations completed with no problems.

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

The Space Telescope Imaging Telescope (CCD/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. As described in
yesterday's report and HSTAR 7476, the acquisition for this proposal
defaulted to fine lock back-up on one FGS only, possibly affecting five
observations. Otherwise, the proposal completed nominally with no further
problems..

1.5 Completed STIS/CCD/MA1/MA2 8505 (SM3a Contamination Plan)

The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was
used to monitor STIS UV/optical sensitivity, using a spectrophotometric
standard star. Changes due to contamination or other causes will be
detected. The observations completed nominally.

1.6 Completed WF/PC-22 8498 (Internal Monitor - Post-TEC Turn On)

The WF/PC-2 was used to obtain routine internal observations in
order to monitor basic instrument health, and optical alignment (K-spots,
INTFLATS, VISFLATS, UVFLATS, bias,
Darks). The observations completed nominally.

1.7 Completed WF/PC-2/STIS/CCD 8506 (STIS SM3a Corrector and Focus Check)

The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) ere
used to check the STIS instrument's focus. The instrument's focus is
checked in two ways: {1} taking a series of images with small dithering
offsets {to effectively improve the spatial resolution, while rejecting
cosmic rays and hot pixels}, and {2} stepping a star {in sub-pixel steps}
across a narrow echelle slit {e.g., the 0.1x0.09 slit}, using the
CCD. The observations completed with no reported problems.

1.8 Completed STIS/MA2 8509 (NUV MAMA Darks)

The Space Telescope Imaging Spectrograph (MA2) was used to
determine the health of the FUV MAMA detector by monitoring the background
count rate. The observations completed with no reported problems.

1.9 Completed Two Sets of WF/PC-2 8496 (Relative Photometry Check)

The WF/PC-2 was used to determine relative photometric throughput
by comparing aperture photometry with pre-SMOV data. Updates will be made
to the photometric tables in
the pipeline and SYNPHOT database as needed. The proposal completed nominally.

1.10 Completed STIS/CCD 8340 (Probing the Kinematics of the Narrow-Line
Region in Seyfert Galaxies with Slitless Spectroscopy)

The Space Telescope Imaging Spectrograph (CCD) was used to perform
studies of the gas kinematics of the narrow-line regions in Seyfert
galaxies. Previous studies indicate complex velocity fields, with evidence
for both gravitational and non-gravitational forces. The proposal
completed nominally.

1.11 Completed WF/PC-2 8494 (Lyman Alpha Check)

The WF/PC-2 was use to observe GRW+70D582 in order to obtain
throughput measurements in UV filters and UV crossed with long-pass filters
{to determine red leak contribution}. These measurements will be used to
indicate any drop in throughput at Lyman Alpha, which could be due to
contamination in the pick-off mirror. The proposal completed with no
reported problems.

1.12 Completed WF/PC-2 8223 (The Nature of RadioOptical Alignments in
Faint Radio Sources)

The WF/PC-2 was used to make observations of the faint radio galaxy
GAL-1816+6 in order to study the nature of its radio/optical
alignment. The study of the host galaxies of high redshift AGN is
important if we are to attempt to investigate the population of high
redshift galaxies, which are not selected on the basis of luminous
starburst activity. The observations were completed as planned, and no
problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 12
Successful: 12

Scheduled Re-acquisitions: 4
Successful: 4

2.2 FHST Updates:
Scheduled: 17
Successful: 17

2.3 Operations Notes:

Servicing Mission Observatory Verification (SMOV) continues.

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

ROP IC-2 was used five times to turn both SSA transmitters on and
off. MA transmitter 1 was turned on once, per ROP IC-1.

SI C&DH errors were reset at 018/1128Z as directed by ROP NS-5.

The NICMOS FPA temperature for detector 1 was enabled at 018/1415Z;
for detector 2 at 018/1416Z; and for detector 3 at 018/1417Z.

Per an operations request, gyros 1 and 2 were powered off at
018/1502Z. Accordingly, gyro 1 and 2 operational limits were adjusted at
018/1526Z, as were RSU-1 housing temperature limits at 108/1758Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of SMOV and normal science observations and calibrations.

/CAW