HUBBLE SPACE TELESCOPE

   DAILY REPORT #2834

PERIOD COVERED:  0000Z (UTC) 03/21/01 - 0000Z (UTC) 03/22/01

Daily Status Report as of 081/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed Two Sets of STIS/CCD 8864 (CCD Dark Monitor-Part 2)

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

    1.2 Completed STIS/CCD 8865 (Bias Monitor-Part 2)

        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 anomalous activity.

    1.3 Completed Two Sets of FGS/1 8731 (A High Angular Resolution Survey 
of the Most Massive Stars in the SMC)

        Fine Guidance Sensor #1 was used to conduct high angular resolution 
observations of some of the SMC's hottest and most luminous objects by 
conducting a comprehensive survey of nearly every spectral type in the 
upper portion of the HR diagram.  Binary or multiple star systems will be 
detected down to an unprecedented level, more than one order of magnitude 
better than possible with WFPC2.  The targets selected include a 
representative list of normal Main Sequence O-stars and their evolved 
descendents, namely supergiants, hypergiants, LBVs, and WRs, many of which 
have been previously observed by HST's spectrometers for purposes of 
cosmological calibrations.  The observations completed, and no problems 
were reported.

    1.4 Completed STIS/CCD 9246 (POMS Test Proposal: Non-scripted Parallel 
Proposal Continuation IV)

        The Space Telescope Imaging Spectrograph (CCD) was used to perform 
a generic target version of the 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 
observations completed with no anomalous activity.

    1.5 Completed Three Sets of STIS/CCD 9248 (Probing the Large Scale 
Structure: Cosmic Shear Observations)

        The Space Telescope Imaging Spectrograph (CCD) was used to measure 
the distortion of light bundles from distant galaxies that probe the 
statistical properties of the intervening inhomogeneous {dark} matter 
distribution.  Its tidal gravitational field distorts the observable image 
shapes thereby causing a coherent ellipticity pattern {Cosmic Shear}.  The 
observations completed nominally.

    1.6 Completed STIS/MA1 8721 (An UV Imaging Survey of IR-Bright Star- 
Forming Galaxies)

        The Space Telescope Imaging Spectrograph (MA1) was used to carry 
out a UV {~1, 600 Angstrom} snapshot imaging survey of all the actively 
star-forming galaxies detected by ISO at Lambda>170 Mum and closer than 
cz=9000 km/s.  The sample covers a large region in the parameter's space of 
morphology, luminosity, metallicity, and star formation intensity.  There 
were no reported anomalies.

    1.7 Completed Two Sets of STIS/CCD 8591 (The Smallest Nuclear Black Holes)

        The Space Telescope Imaging Spectrograph (CCD) was used to observe 
small nuclear black holes which are the last major unexplored part of BH 
parameter space, searching for the smallest BHs that HST can possibly 
find.  The proposal completed with no reported anomalies.

    1.8 Completed Two Sets of WF/PC-2 8824 (Decontaminations and Associated 
Observations Pt. 3/4)

        The WF/PC-2 was used for the monthly WFPC2 decons.  Also included 
are 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.

    1.9 Completed 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.

    1.10 Completed WF/PC-2 9244 (POMS Test Proposal: WFII Parallel Archive 
Proposal Continuation)

        The WF/PC-2 was used to perform a generic target version of the 
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 observations completed with no anomalous 
activity.

    1.11 Completed WF/PC-2 8709 (UV Light from Old Stellar Populations: A 
Census of UV Bright Stars in `Blue Tail' Globular Clusters)

        The WF/PC-2 was used to make observations of UV-bright stars in 
Galactic Globular Clusters {GGCs}. These will complement data obtained 
during Cycles 5 and 6.  The goals are multifold: {a} to observe the 
morphology in the faint blue tails {BTs} of GGC horizontal branches {HBs}; 
{b} to explore the relationship between the HB mass distribution in BT 
clusters to the clusters' structural and dynamical properties; {c} to gain 
further samples of Blue Straggler Stars and the long-sought Cataclysmic 
Variables in GGC cores; and {d} to obtain relatively large samples of post 
main sequence stars.  The observations completed with no reported problems.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions:  5
Successful:  5

  Scheduled Re-acquisitions: 11
Successful: 11

    2.2 FHST Updates:
Scheduled: 10
Successful: 10

    2.3 Operations Notes:

        Using ROP SR-1A, the SSR EDAC error counter was cleared at 080/1046Z.

        SSA transmitter #1 was turned on at 081/0215Z and turned off at 
081/0240Z as directed by ROP IC-2.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW