HUBBLE SPACE TELESCOPE

   DAILY REPORT #2792

PERIOD COVERED:  0000Z (UTC) 01/22/01 - 0000Z (UTC) 01/23/01

Daily Status Report as of 023/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed WF/PC-2 8683 (Imaging Of Brightest Cluster Galaxies: The 
High End Of The Black Hole Mass Distribution)

        The WF/PC-2 was used to make kinematic black hole detections in 
galaxies to decide whether they indicate that the mass correlates with both 
optical luminosity and radio power.  The observation completed with no 
reported problems.

    1.2 Completed Ten Sets of STIS/CCD 8562 (Probing the Large Scale 
Structure: Cosmic Shear Observations)

        The Space Telescope Imaging Spectrograph (CCD) was used to probe 
the distortion of light bundles from distant galaxies, looking at the 
statistical properties of the intervening inhomogeneous {dark} matter 
distribution.  The proposal completed nominally.

    1.3 Completed Two Sets of WF/PC-2 8823 (Decontaminations and Associated 
Observations Pt. 2/4)

        The WF/PC-2 was used for the monthly WFPC2 decons.  Also included 
were instrument monitors tied to decons: photometric stability check, focus 
monitor, pre- and post-decon internals {bias, intflats, kspots, & darks}, 
UV throughput check, VISFLAT sweep, and internal UV flat check.  There were 
no reported problems.

    1.4 Completed Two Sets of STIS/CCD 8837 (CCD Dark Monitor-Part 1)

        The Space Telescope Imaging Spectrograph (CCD) was used to monitor 
the darks.  The proposal completed with no reported problems.

    1.5 Completed WF/PC-2 8725 (The Formation Epoch{s} of Globular Clusters 
Around Ellipticals from Ultraviolet Photometry)

        The WF/PC-2 was used to study the formation history of elliptical 
galaxies by obtaining far-UV photometry of their globular clusters.  The 
far-UV photometry will be used in conjunction with existing optical data to 
constrain the ages of these clusters, and thus the formation epochs of 
their host galaxies.  There were no reported problems.

    1.6 Completed Three Sets of WF/PC-2 8827 (Cycle 9 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 proposal completed nominally.

    1.7 Completed STIS/CCD 7310 (The Interaction of Accretion Disks with 
Protostellar Binaries)

        The Space Telescope Imaging Spectrograph (CCD) was used to study 
the interaction of the accretion disk with the protostellar binary system 
GG-Tau.  This should determine how the accretion disk interacts with stars 
in young binary systems and will measure the rates that mass accumulates 
onto each component of the pair.  The observations were executed as 
scheduled, and no anomalies were noted.

    1.8 Completed Three Sets of WF/PC-2 8805 (POMS Test Proposal: WFII 
Parallel Archive Proposal Continuation)

        The WF/PC-2 was used to perform a generic target version of the 
WFPC2 Archival Pure Parallel program.  The program will be used to take 
parallel images of random areas of the sky, following the recommendations 
of the Parallels Working Group.  The proposal completed with no reported 
problems.

    1.9 Completed STIS/CCD 8838 (Bias Monitor - Part 1)

        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 nominally.

    1.10 Completed WF/PC-2/STIS/CCD 8191 (The Faintest Radio Galaxies: 
Interacting Starbursts at z<1)

        Deep WF/PC-2 imaging and Space Telescope Imaging Spectrograph (CCD) 
slitless spectroscopy of two of our ultra-deep VLA fields were 
performed.  There were no reported problems.

    1.11 Completed S/C 5582 (FOC/48 Monthly Activation (Camera Section 
Only): Cycle 4)

         This proposal was executed as scheduled, and no anomalies were noted.
anomalies were noted.

    1.12 Completed Two Sets of WF/PC-2 8812 (Cycle 9 Internal Monitor)

        The WF/PC-2 was used to obtain routine internal monitors for WFPC2 
in order 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.  There were no reported problems.

    1.13 Completed Two Sets of STIS/MA1/MA2 8843 (Cycle 9 MAMA Dark 
Measurements)

        The Space Telescope Imaging Spectrograph (MA1 and MA2) was used to 
perform the routine monitoring of the MAMA detector dark noise.  The 
proposal completed nominally.

    1.14 Completed STIS/CCD/MA1 8237 (Detecting Circumstellar "Hydrogen 
Wall'' Emission Around a Nearby, Sun-like Star)

        The Space Telescope Imaging Spectrograph (CCD and MA1) was used to 
try to detect for the first time nebular Lyman- Alpha emission surrounding 
a Sun-like star produced by the interaction of its stellar wind with the 
ISM.  Such "hydrogen walls'' have likely been detected in absorption around 
the Sun and several other nearby stars using GHRS Lyman-Alpha 
spectra.  However, most of these detections are tentative due to the 
difficulty in separating the H-wall absorption from the interstellar H I 
absorption.  The observations completed with no reported problems.

    1.15 Completed FOC/96 7923 (FOC F/96 Turn-on)

        The Faint Object Camera (f/96) was used to take an internal flat 
and a dark to ensure that the 30-day limit for the FOC is not 
exceeded.  The observations were executed as scheduled, and no anomalies 
were noted.

    1.16 Completed Two Sets of WF/PC-2 8815 (Cycle 9 Earth Flats)

        The WF/PC-2 was used to monitor flatfield stability.  This proposal 
obtains sequences of Earth streak flats to construct high quality flat 
fields for the WF/PC-2 filter set.  These flat fields will allow mapping of 
the OTA illumination pattern and will be used in conjunction with previous 
internal and external flats to generate new pipeline superflats.  The 
proposal completed nominally.

    1.17 Completed STIS/CCD/MA1 8590 (UV Imaging and Spectroscopy of 
Luminous Blue Compact Galaxies from z=0 to z=1)

        The Space Telescope Imaging Spectrograph (CCD and MA1) was used to 
observe two well-defined samples of low-mass starburst galaxies, one in the 
local universe {z<0.1} and another at intermediate redshifts {0.2 < z < 
0.7}.  Both samples show optical sizes, morphologies, emission line widths, 
and luminosities comparable to those of LBGs at z=3, and are therefore 
probably the best local analogs and testbeds for further study of 
LBGs.  Our main goals are to: {1} explore the morphologies, surface 
brightness distributions, and half-light radii of nearby starforming 
galaxies in the FUV, near Ly-alpha; {2} search for systematic differences 
among UV, optical, and near-IR morphologies and structural parameters; {3} 
investigate the intrinsic emission and absorption spectra near Ly-alpha of 
starbursting dwarf galaxies, with special attention to Ly- alpha profiles 
and interstellar and stellar photospheric absorption from Si II, O I, C II, 
Si IV, and C IV; {4} measure their FUV-optical colors and dust extinction 
properties; and {5} test the hypothesis that low-mass starbursts are the 
local counterparts of LBGs.  The observation completed normally.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions:  7
Successful:  7

  Scheduled Re-acquisitions:  8
Successful:  8

    2.2 FHST Updates:
Scheduled: 18
Successful: 18

    2.3 Operations Notes:

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

        Per an operations request, Gyro #6 was powered off at 
022/2155Z.  Gyro #6 power on commanding is scheduled for 024/2229Z, and 
re-configuration to shadow maode is planned for 025/0321Z.

        The ephemeris table was uplinked at 023/0212Z per ROP DF-07A.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW