HUBBLE SPACE TELESCOPE

   DAILY REPORT #2611

PERIOD COVERED:  0000Z (UTC) 04/26/00 - 0000Z (UTC) 04/27/00

Daily Status Report as of 118/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 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.

    1.2 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 STIS/CCD/MA2 8145 (Abundances and Physical Conditions in 
the ISM of the Magellanic Clouds)

        The Space Telescope Imaging Spectrograph (CCD and MA2) was used to 
obtain high-resolution UV spectra of one star, SK155, in the SMC, as part 
of a detailed study of the interstellar medium in and toward the Magellanic 
Clouds --- nearby systems of low metallicity and low dust-to-gas ratio for 
which stellar abundance data are also available.  The proposal completed 
with no reported problems.

    1.4 Completed WF/PC-2 8059 (POMS Test Proposal: Targeted Parallel 
Archive Proposal)

        The WF/PC-2 was used to observe the parallel opportunities 
available in the neighborhood of bright galaxies are treated in a slightly 
different way from the normal pure parallels.  Local Group galaxies offer 
the opportunity for a closer look at young stellar 
populations.  Narrow-band images in F656N can be used both to identify 
young stars via their emission lines, and to map the gas distribution in 
star-forming regions.  The observations completed nominally.

    1.5 Completed STIS/CCD/MA1 8241 (A Snapshot Survey of Interstellar 
Absorption Lines)

        The Space Telescope Imaging Spectrograph (CCD and MA1) was used to 
make high resolution Echelle spectrographic observations of the standard 
ultraviolet star HD175360 as part of a snapshot survey of interstellar 
absorption lines.  A wavelength calibration image was also taken.  The 
observations were executed as scheduled, and no anomalies were noted.

    1.6 Completed STIS/CCD 8127 (The Homogeneity of Damped LyAlpha Systems 
{and Variability in BAL Systems})

        The Space Telescope Imaging Spectrograph (CCD) was used to 
investigate the damped LyAlpha line at z_abs = 1.6595 in the 
gravitationally lensed Cloverleaf QSO, seen in the composite FOS-G270H 
spectrum of the Cloverleaf.  The observations completed with no reported 
anomalies.

    1.7 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.

    1.8 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.  The proposal completed with no reported problems.

    1.9 Completed STIS/CCD 8437 (Dark Monitor-Part 2 C8)

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

    1.10 Completed STIS/CCD 8474 (Coronographic Imaging of Protoplanetary 
Disks)

        The Space Telescope Imaging Spectrograph (CCD) was used to obtain 
broad-band optical coronographic imaging that will be used to search for 
circumstellar disks and indirect signatures of the presence of massive 
planets toward the nearby Herbig Ae/Be and T Tauri stars.  The observations 
completed with no reported problems.

    1.11 Completed WF/PC-2 8268 (Lensed Quasar Hosts at High Redshift)

        The WF/PC-2 was used to make observations of the high redshift, 
lensed quasar CTQ414.  Gravitational lensing offers a novel way to detect 
quasar host galaxies at z > 1 and to measure their properties.  The 
observations were completed as scheduled, and no anomalies were reported.

    1.12 Completed Two 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.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 6
Successful: 6

  Scheduled Re-acquisitions: 8
Successful: 8

    2.2 FHST Updates:
Scheduled: 17
Successful: 17

    2.3 Operations Notes:

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

        Using ROP IC-2, SSA transmitter 2R was turned on and off for three 
intervals.

        The NCCS-1 status buffer was dumped and cleared at 117/1310Z per 
ROP NS-3.

        The NICMOS FPA temperature sensor for detector 2 was enabled at 
117/1628Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW