HUBBLE SPACE TELESCOPE

   DAILY REPORT #2563

PERIOD COVERED:  0000Z (UTC) 02/17/00 - 0000Z (UTC) 02/18/00

Daily Status Report as of 049/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 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.

    1.2 Completed Two 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.

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

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

    1.4 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.

    1.5 Completed Six 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.

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

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of HCLQ1402-1, HCLQ0745+4 and HCLQ1226-0 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.

    1.7 Completed WF/PC-2 8444 (WF/PC-2 CYCLE-8 Internal Monitor)

        The WF/PC-2 was used to make a bias, and an internal flat, 
observation as part of a Cycle-8 monitoring program to monitor the health 
of the cameras.  A variety of internal exposures are obtained in order to 
provide a monitor of the integrity of the CCD camera electronics in both 
bays {gain 7 and gain 15}, a test for quantum efficiency in the CCDs, and a 
monitor for possible buildup of contaminants on the CCD windows.  The 
observations were executed as scheduled, and no anomalies were noted.

    1.8 Completed FGS 8335 (Calibrating Stellar Models with the Pleiades: 
Resolving the Distance Discrepancy)

        The Fine Guidance Sensors were used to make astrometric 
observations of the star H173 that is located in the Pleiades 
cluster.  This is the first phase of a multi-year effort to measure true 
masses for low-mass dwarfs in the Pleiades and to determine an accurate 
distance to this fundamental cluster.  The observations were completed as 
scheduled, and no anomalies were noted.

    1.9 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.  As described in HSTAR 7510 and 2.1, two 
re-acquisitions for the second iteration of this proposal defaulted to fine 
lock backup on one FGS only, possibly affecting five 
observations.  Otherwise, the observations were executed as scheduled, and 
no further anomalies were noted.

    1.10 Completed WF/PC-2 8403 (A Rare Case of Major LBV Eruption)

        The WF/PC-2 was used to follow in detail the spectrophotometric 
evolution of NGC2363-V1 until the end of its major eruption.  The 
observations completed with no reported problems.

    1.11 Completed WF/PC-2 8194 (Evolution of High-Redshift Seyfert Galaxies)

        The WF/PC-2 was used to make observations of the high-redshifted 
Seyfert galaxy Gal-105312 in order to study its evolution.  The 
observations will provide insights into the Seyfert phenomenon at 
intermediate redshift and will complement similar HST studies of normal 
galaxies, clusters and quasars.  The observations were executed as 
scheduled, and no anomalies were noted.

    1.12 Completed Two Sets of WF/PC-2 8301 (A Snapshot Survey of X-ray 
Selected Central Cluster Galaxies)

        The WF/PC-2 was used to make snapshot survey observations of the 
x-ray, central cluster galaxies A646 and Z3179.  Central cluster galaxies 
are the most massive stellar systems known and have been used as standard 
candles for many decades.  The observations were executed as scheduled, and 
no anomalies were noted.

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

        The WF/PC-2 and the Space Telescope Imaging Spectrograph (MA1 and 
MA2) were 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.

    1.14 Completed STIS/CCD 8253 (Jet Acceleration of Narrow Line Region Gas)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of the Markarian galaxy MARK34 to study its jet acceleration 
of narrow line Gas regions.  A wavelength calibration image was also 
taken.  As described in HSTAR 7510 and 2.1, the acquisition and two 
re-acquisitions for this proposal defaulted to fine lock backup on one FGS 
only, possibly affecting four observations.  Otherwise, the observations 
were executed as scheduled, and no further anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 9
Successful: 9
  Scheduled Re-acquisitions: 5
Successful: 5

        Per HSTAR 7510, the acquisition at 048/220203Z defaulted to fine 
lock backup on FGS-1 only when scan step limit was exceeded on FGS-3.  The 
following re-acquisitions at 048/233910Z and 049/011537Z also defaulted to 
fine lock backup on FGS-1.  The proposals detailed in 1.9 and 1.14 may have 
been affected.

    2.2 FHST Updates:
Scheduled: 20
Successful: 20

    2.3 Operations Notes:

        Servicing Mission Observatory Verification (SMOV) continues.

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

        Operations Note #718, which adjusts the recharge ratio upper limit 
for sun/orbit time, is now in effect.  This will continue until day 058.

        CCS string "G" was configured for a line outage recorder playback 
from 048/1700Z until 049/0319Z.

        The battery #6 recharge ratio (CSFRRAT6) flagged out-of-limits low 
with a value of 0.70 sometime during a loss of signal between 049/0554Z and 
049/0608Z.  At the time, the recharge ratios of all batteries was lower 
than usual (lower than 1).  The mnemonic returned to normal bounds at 
049/073617Z, the time of the next trickle charge.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of SMOV and normal science observations and calibrations.

/CAW