HUBBLE SPACE TELESCOPE

   DAILY REPORT #2580

PERIOD COVERED:  0000Z (UTC) 03/14/00 - 0000Z (UTC) 03/15/00

Daily Status Report as of 075/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 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.

    1.2 Completed Three Sets of STIS/CCD/MA1 8038 (Imaging of the Alpha 
Orionis System)

        The Space Telescope Imaging Spectrograph (CCD and MA1) was used to 
make ultraviolet images of the Alpha Orionis triple system using different 
FUV/NUV filters.  The goal is to resolve surface features and any extended 
atmosphere.  Images will also be recorded of a reference point source star 
in order to determine exactly the PSF for the Alpha Orionis 
observations.  The observations completed with no reported problems.

    1.3 Completed STIS/CCD/MA2 8421 (Spectroscopic Sensitivity for (MAMA 
and) CCD)

        The Space Telescope Imaging Spectrograph (CCD and MA2) was used to 
perform basic sensitivity measurement for some supported (MAMA and) CCD 
spectroscopic modes.  Sensitivity measurements are done for a few primary 
tilts of the gratings.  The proposal completed nominally, with no reported 
problems.

    1.4  Completed Three Sets of WF/PC-2 8442 (WF/PC-2 Cycle 8 Standard Darks)

        The WF/PC-2 was used to make a series of Cycle 8 standard dark 
calibration observations.  This dark calibration program obtains dark 
frames every week in order to provide data for the ongoing calibration of 
the CCD dark current rate, and to monitor and characterize the evolution of 
hot pixels.  The observations were executed as scheduled, and no anomalies 
were noted.

    1.5 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.

    1.6 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 WF/PC-2 8239 (Imaging the NLR in a Complete Sample of 
z<0.5 Radio-Quiet PG Quasars)

        The WF/PC-2 was used to observe quasar PG1307+085 and to determine 
its role in the evolution of galaxies, where a central engine leaves its 
visible imprints in the galaxy through strong ionization and heating of the 
ISM.  The observations completed with no reported problems.

    1.8 Completed STIS/CCD 8786 (Morphological and Spectral Evolution of 
Galaxies: Follow-up on NGC346-1)

        The Space Telescope Imaging Spectrograph (CCD) was used to observe 
the high-redhsift universe by providing kiloparsec resolution of distant 
galaxies.  However, since the rest-frame wavelengths of galaxies move 
further into the UV at increasingly higher redshifts, evolutionary effects 
are diluted by insufficiently well determined k-corrections.  Thus a 
library of UV images of normal galaxies at low redshifts is essential to 
our understanding of the properties and evolution of the high redshift 
universe.  The proposal completed nominally, with no reported problems.

    1.9 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 MARK463E to study its jet acceleration 
of narrow line Gas regions.  A wavelength calibration image was also 
taken.  The observations were executed as scheduled, and no anomalies were 
noted.

    1.10 Completed STIS/CCD 8412 (STIS CCD Imaging Flats C8)

        The Space Telescope Imaging Spectrograph (CCD) was used to 
investigate the flat-field stability of the unit over a monthly period.  A 
bias calibration observation was also taken.  The observations were 
executed as scheduled, and no anomalies were noted.

    1.11 Completed FGS 8525 (FGS-2R Guider Commissioning)

        FGS-2R was used to verify the acquisition logic for the 
newly-replace FGS, including K factors, alignment, photometric calibration 
and the ability to lock on both bright and faint guide stars.  There were 
no reported problems.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 17
Successful: 17

  Scheduled Re-acquisitions:  5
Successful:  5

    2.2 FHST Updates:
Scheduled: 21
Successful: 21

    2.3 Operations Notes:

        A TTR was written when a GCMR could not be sent at 074/1825Z due to 
a problem with the NCC software.

        Per ROP DF-18A, the ESB was dumped and cleared at 074/1914Z.

        There was a STIS EMC retry at 075/0644Z.  The STIS flight software 
error counter was reset.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW