HUBBLE SPACE TELESCOPE

   DAILY REPORT #2828

PERIOD COVERED:  0000Z (UTC) 03/13/01 - 0000Z (UTC) 03/14/01

Daily Status Report as of 073/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed Three Sets of WF/PC-2 8817 (Cycle 9 INTFLAT Sweeps and 
Linearity Test)

        The WF/PC-2 was used to obtain INTFLAT observations in order to 
monitor the pixel to pixel flatfield response and provide a linearity 
check.  The INTFLAT sequences, to be done once during the year, are similar 
to those from the Cycle 8 program 8448.  The images will provide a backup 
database in the event of complete failure of the VISFLAT lamp as well as 
allow monitoring of the gain ratios.  The sweep is a complete set of 
internal flats, cycling through both shutter blades and both gains.  The 
linearity test consists of a series of INTFLATs in F555W, in each gain and 
each shutter.  There was no anomalous activity.

    1.2 Completed 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.

    1.3 Completed STIS/CCD/MA1 8889 (Tortured Coronae in the Rapid Breaking 
Zone)

        The Space Telescope Imaging Spectrograph (CCD and MA1) was used to 
perform observations in conjunction with deep Chandra X-ray Observatory 
high energy transmission grating {HETGS} exposures of three key G0-G5 
giants that will address fundamental questions concerning their hot 
magnetized coronae by determining temperatures and densities, probing 
chemical fractionation processes, and exploring plasma dynamics.  The 
observations completed nominally.

    1.4 Completed 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.

    1.5 Completed STIS/MA1 8862 (FUV-MAMA Cycle 9 Flats)

        The Space Telescope Imaging Spectrograph (MA1) was used to obtain 
FUV-MAMA observations of the internal Krypton lamp to construct an FUV flat 
applicable to all FUV modes.  No problems were encountered.

    1.6 Completed WF/PC-2 8816 (Cycle 9 UV Earthflats)

        The WF/PC-2 was used to obtain sequences of Earth streak flats to 
improve the quality of pipeline flat fields for the WFPC2 UV filter set and 
in order to monitor flat field stability.  There were no reported problems.

    1.7 Completed WF/PC-2 8686 (LINERs in Early-type Galaxies: Ionized by 
the UV-upturn Population?)

        The WF/PC-2) was used to investigate the presence of extended 
ionized gas with LINER spectra in a large fraction {60-70%} of early-type 
galaxies.  The observations completed with no reported anomalies.

    1.8 Completed 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.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 11
Successful: 11

  Scheduled Re-acquisitions:  4
Successful:  4

    2.2 FHST Updates:
Scheduled: 21
Successful: 21

    2.3 Operations Notes:

        Operations personnel, in addition to supporting on-going operations 
from the Science Institute, participated in GSFC Internal Simulation #6 
(EVA-5) from 8 a.m. until approximately 5:30 p.m.

        The SSR EDAC error counter was cleared twice per ROP SR-1A.

        The STIS MCE-1 reset at 072/155404Z while the low voltage was on 
and while outside any SAA interval.  The STIS flight software error counter 
was cleared at 072/1608Z, using ROP NS-12.  MAMA-1 was recovered at 
072/1620Z by normal SMS commanding when the high voltage was turned on.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW