HUBBLE SPACE TELESCOPE

   DAILY REPORT #2566

PERIOD COVERED:  0000Z (UTC) 02/23/00 - 0000Z (UTC) 02/24/00

Daily Status Report as of 055/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 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.

    1.2 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.  The proposal completed with no reported problems.

    1.3 Completed FGS 8527 (Near Term Stability)

        FGS-2R was used to determine the near term stability of the 
instrument.  The goals are twofold: {1} to establish the baseline Long Term 
Stability measurement for the new FGS and monitor changes in the relative 
plate scale and distortion since the SMOV MiniOFAD; and {2} to monitor 
changes in the transfer function over months.  The proposal completed 
nominally.

    1.4 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.

    1.5 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.

    1.6 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.

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

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of HCLQ1155-2, HCLQ0909+0, HCLQ1200+3 and HCLQ1249-0 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.

    1.8 Completed WF/PC-2 8216 (T Tauri Star Snapshot Survey II. Completing 
the CTTs Sample)

        The WF/PC-2 was used to make observations of the T-Tauri class star 
known as V13312-CYG as part of Snapshot Survey II.  This database will be 
of fundamental importance to understanding the nature of planet-forming 
environments and their frequency in the galaxy.  The observations were 
executed as scheduled, and no anomalies were noted.

    1.9 Completed WF/PC-2/STIS/CCD 8169 (HST-Galileo Io Campaign)

        Both the WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) 
were used to make observations of Jupiter's moon Io.  Io plays a central 
role in the Jovian system, yet the mechanisms that couple its volcanoes, 
the tenuous atmosphere, the escaping corona and the plasma torus remain 
elusive.  In 1999 there is the unique opportunity to combine HST 
observations with the Galileo close flybys of Io.  The observations were 
completed as planned, and no problems were reported.

    1.10 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 3C382.0.  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.

    1.11 Completed STIS/CCD/MA1 8190 Luminous Infrared Galaxies- 
Superstarbursts or AGN)

        The Space Telescope Imaging Spectrograph (CCD and MA1) was used to 
obtain high resolution spectroscopy of four of the nearest `warm' 
ultraluminous infrared galaxies (ULIGs) that were discovered in the IRAS 
database, and for which we have recently obtained WFPC2 images in B, I 
filters.  These objects are thought to represent a critical evolutionary 
link between ULIGs and optically selected QSOs.  The observations completed 
with no reported problems.

    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 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.

    1.14 Completed Two Sets of STIS/MA2 8426 (Cycle 8 MAMA Dark Measurements)

        The Space Telescope Imaging Spectrograph (MA1) 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 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.

    1.16 Completed WF/PC-2 8303 (What is 52W036?)

        The WF/PC-2 was used to observe a most peculiar galaxy, 52W036, in 
the large, deep redshift survey of faint galaxies.  This galaxy, previously 
identified as a submillijansky radio source at z=0.24, is outstanding in 
almost every property.  Its combination of enormous size and luminosity, 
high surface- brightness, and very blue color do not compare to that of any 
other known galaxy.  In addition, its morphology changes dramatically from 
a horse-shoe shape in the ultra-violet to an apparent source pair in the 
near-infrared.  Over the past decade observers have given this particular 
object special attention in attempt to understand its bizarre nature.  At 
present, the reason for its unusual properties is still elusive. 
Possibilities include that it is a powerfully starbursting ring galaxy, a 
tidally interacting galaxy pair, or perhaps even a gravitational lens.  The 
observations completed with no reported problems.

    1.17 Completed WF/PC-2 8345 (Multipolar Bubbles and Jets in Very Low 
Excitation Planetary Nebulae - A WF/PC-2 H-Alpha Imaging Survey)

        The WF/PC-2 was used to make H-Alpha observations of the very low 
excitation planetary nebula PK335-04D2 in order to study its multipolar 
bubbles and jets.  Comparison of the morphology of this young PNe sample 
with more evolved PNe populations will set new constraints on models for 
the production of jet-like outflows and nebular evolution.  The 
observations were completed as planned, and no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 13
Successful: 13

  Scheduled Re-acquisitions:  3
Successful:  3

    2.2 FHST Updates:
Scheduled: 31
Successful: 31

    2.3 Operations Notes:

        Servicing Mission Observatory Verification (SMOV) continues.  The 
operations team transferred to CCS string "G" at 055/0614Z.

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

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of SMOV and normal science observations and calibrations.

/CAW