HUBBLE SPACE TELESCOPE

       DAILY REPORT #2622

PERIOD COVERED:  0000Z (UTC) 05/11/00 - 0000Z (UTC) 05/12/00

Daily Status Report as of 133/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed Four 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.

    1.2 Completed Seven 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.

    1.3 Completed Three Sets of WF/PC-2 8460 (Cycle 8 Supplemental Darks pt 
2/3)

        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.

    1.4 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.

    1.5 Completed Three Sets of 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 STIS/CCD 7403 (Measuring Black Hole Masses in Broad-Lined 
AGNs)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of broad-lined active galactic nuclei (AGN) located in  galaxy 
NGC-4278.  Broad emission lines in AGNs are considered one of the most 
direct signatures of a large central mass, which is presumed to be a black 
hole.  A wavelength calibration image was also taken.  The observations 
were completed as planned, and no anomalies were reported.

    1.7 Completed WF/PC-2 8444 (WF/PC-2 CYCLE-8 Internal Monitor)

        The WF/PC-2 was used to make a bias, and an internal flat, 
observation as part of a Cycle-8 monitoring program 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.  The 
observations were executed as scheduled, and no anomalies were noted.

    1.8 Completed WF/PC-2 8173 (Alignment and Evolution of Redshift One 
Radio Galaxies)
%       The WF/PC-2 was used to observe galaxies associated with powerful 
distant radio sources which are the most massive ellipticals known at early 
cosmic epochs, and are also uniquely important for understanding the 
physics of AGN and the interactions between the radio source and its 
environment.  The observations completed with no reported problems.

    1.9 Completed STIS/CCD 8489 (Searching for the Hydrogen Reionization 
Edge of the Universe at 5HST)

        The Space Telescope Imaging Spectrograph (CCD) was used to observe 
36 parallel orbits {4--5 fields of 5--8 orbits each} to constrain the H 
Lyman-edge in emission that marks the transition from a neutral to a fully 
ionized IGM.  This edge is due to recombination from the H Lyman series and 
Lyman continuum, and can be used to constrain zion, one of the most 
important unknown quantities in large scale structure and cosmology.  The 
proposal completed nominally.

    1.10 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.

    1.11 Completed STIS/MA2 8426 (Cycle 8 MAMA Dark Measurements)

        The Space Telescope Imaging Spectrograph (MA2) was used to make a 
routine Cycle-8 MAMA dark noise calibration measurement.  This proposal 
will provide the primary means of checking on the health of the MAMA 
detectors.  This is done through frequent monitoring of the background 
count rate.  The observations were completed as planned, and no problems 
were reported.

    1.12 Completed STIS/CCD/MA2 8435 (LSF Measure of the MAMA Echelle Modes)

        The Space Telescope Imaging Spectrograph (CCD and MA2) was used to 
measure the LSF of the Echelle modes with an external target using a narrow 
slit.  The proposal completed nominally.

    1.13 Completed STIS/CCD/MA1/MA2 8280 (Origins, Structure and Evolution 
of Magnetic Activity in the Cool Half of the H-R Diagram: A STIS Survey)

        The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was 
used to make observations of star HD72779 to carry out part of a major 
ultraviolet spectral survey of "coronal" late-type stars.  A wavelength 
calibration image was also taken.  The observations were executed as 
scheduled, and no anomalies were noted.

    1.14 Completed WF/PC-2 8544 (POMS Test Proposal: WFII Backup Parallel 
Archive Proposal II)

        The WF/PC-2 was used to execute a POMS test proposal that was 
designed to simulate scientific plans.  No problems were encountered.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 4
Successful: 4

  Scheduled Re-acquisitions: 11
Successful: 11

    2.2 FHST Updates:
Scheduled: 10
Successful: 10

    2.3 Operations Notes:

HSTAR 7597- CCS B string, while running hourly check, DOC found TCHKCHANGE 
process down on Core Data Server 132/13:30z. PATROL showed core data server 
in error, but Tivoli did not display critical error.  Response Team paged.

HSTAR 7598- Guide Star Acquisition (3,1,3) resulted in fine lock backup 
using FGS1 (132/21:29 due to SSLE and stop flag on primary FGS3.  Guide 
Star re-acquisitions (132/23:02. 133/00:39, 02:15 and 03:52z were completed 
in fine lock backup.  Possibly affecting STIS 112, 113: WFPCII 188 and 189.


3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW