HUBBLE SPACE TELESCOPE

   DAILY REPORT #2560

PERIOD COVERED:  0000Z (UTC) 02/14/00 - 0000Z (UTC) 02/15/00

Daily Status Report as of 046/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

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

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of HCLQ0751+2 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.

    1.2 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.  As documented in HSTAR 7505 and described in 2.1, due to the 
acquisition problems, this proposal may have been affected.  Otherwise, the 
proposal completed with no further eported problems.

    1.3 Completed 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.  As documented in 
HSTAR 7505 and described in 2.1, due to the acquisition problems, this 
proposal may have been affected.  Otherwise, the observations were 
completed as planned, and no further anomalies were reported.

    1.4 Completed Two Sets of STIS/CCD 8437 (Dark Monitor-Part 2 C8)

        The Space Telescope Imaging Spectrograph (CCD) was used to monitor 
the darks.  As documented in HSTAR 7505 and described in 2.1, due to the 
acquisition problems, the first iteration of this proposal may have been 
affected.  Otherwise, the proposal completed nominally.

    1.5 Completed WF/PC-2 8338 (The Evolution of the Host Galaxies of 
Powerful Radio Sources)

        The WF/PC-2 was used to make observations of the host galaxy of the 
powerful radio source known as MRC0529-21.  A combined data set of radio 
galaxies and quasars will allow powerful tests of the relationship between 
radio galaxies and quasars and the evolution of the host galaxies of 
powerful radio sources over a wide range of look-back times.  The 
observations were executed as scheduled, and no anomalies were noted.

    1.6 Completed 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.

    1.7 Completed STIS/CCD 8412 (STIS CCD Imaging Flats C8)

        The Space Telescope Imaging Spectrograph (CCD) was used to 
investigate the flat-field stability of the unit over a monthly period.  A 
bias calibration observation was also taken.  The observations were 
executed as scheduled, and no anomalies were noted.

    1.8 Completed STIS/CCD 8411 (STIS CCD Spectroscopic Flats C-8)

        The Space Telescope Imaging Spectrograph (CCD) was used to obtain 
CCD flats in the spectroscopic mode.  The observations were completed as 
scheduled, and no anomalies were reported.

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

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of HCLQ1451-2 and HCLQ0941-1 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.

    1.10 Completed Three Sets of WF/PC-2 8442 (WF/PC-2 Cycle 8 Standard Darks)

        The WF/PC-2 was used to make a series of Cycle 8 standard dark 
calibration observations.  This dark calibration program obtains dark 
frames every week in order to provide data for the ongoing calibration of 
the CCD dark current rate, and to monitor and characterize the evolution of 
hot pixels.  The observations were executed as scheduled, and no anomalies 
were noted.

    1.11 Completed Six Sets of FGS 8524 (FGS-2R Mini OFAD)

        FGS-2R was used to calibrate FGS2r's Optical Field Angle Distortion 
{OFAD} to a level of precision required to operate the FGS2r as a guiding 
instrument.  HST will be pointed so as to cause selected stars in an 
astrometric cluster to be distributed throughout the FGS2r full FOV or 
pickle.  The apparent relative positions of these stars will be measured by 
a sequence of Position Mode observations.  In each of 5 orbits, each with a 
different pointing, about 15 stars will be observed.  Their apparent 
relative positions will be compared to the astrometric catalog and the OFAD 
will be calibrated to remove such differences.  The observations completed 
with no reported problems.

    1.12 Completed Seven 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.

    1.13 Completed Six 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.

    1.14 Completed Two Sets of 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.

    1.15 Completed Four Sets of FGS 8523 (FGS2R - FGS Alignment)

        FGS-2R was used to determine the alignment of the newly installed 
FGS-2R with FGS-1R and FGS-3.  After the final adjustment of FGS-2R's AMA 
{proposal 8522}, selected stars from the astrometric M35 cluster will be 
observed by FGS2r in Position Mode, while FGS-1R and FGS-3 will lock onto 
astrometric guide star pairs.  The pointing and orientation of HST will be 
held constant for the four visits of this test.  Each visit will use 
different guide star pairs, but the same set of stars will be observed in 
FGS-2R.  The observations completed with no reported problems.

    1.16 Completed STIS/CCD/MA1 8107 (What is the Nature of the Cold Medium 
in Cooling Flow Clusters?)

        The Space Telescope Imaging Spectrograph (CCD/MA1) was used to 
observe X-ray spectra of cooling flow clusters of galaxies in an attempt to 
discover the presence of large columns of "cold'' absorbing material.  The 
proposal completed with no reported problems.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 14
Successful: 14

        HSTAR 7505 reports that the acquisition at 045/004902Z acquired 
successfully, but at 045/011519Z an FGS acquisition command caused stop 
flags on FGS-3.  FGS-1 then failed the search radius exceed limit.  The 
proposals described in 1.2, 1.3 and 1.4 may have been affected.  All this 
occurred as a result of reloading FGS K factor guiding defaults via the SMS.
  Scheduled Re-acquisitions:  2
Successful:  2

    2.2 FHST Updates:
Scheduled: 24
Successful: 24

    2.3 Operations Notes:

        Servicing Mission Observatory Verification (SMOV) continues with 
the operations team still using CCS string "G".

        Using ROP DF-18A, the ESB was dumped at cleared at 045/1820Z.

        An SI C&DH error was reset at 045/2149Z per ROP NS-5.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of SMOV and normal science observations and calibrations.

/CAW