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Subject: Daily Report #2083 03/19/98


                      HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2083

PERIOD COVERED:  0000Z (UTC) 03/18/98 - 0000Z (UTC) 03/19/98

Daily Status Report as of 078/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed WF/PC-2 7712 (WF/PC-2 Cycle 7 Supplemental Darks pt2/3)

       The WF/PC-2 was used to make a series of Cycle 7 supplemental
calibration darks.  This dark calibration program obtains three dark frames
every day to provide data for monitoring and characterizing the evolution
of hot pixels.  As described in yesterday's report and in HSTAR 6399, the
acquisition for this proposal defaulted to fine lock on FGS-3 only.
Otherwise, the observations were executed as scheduled, and no further
anomalies were noted.

   1.2 Completed STIS/CCD 7803 (Daily Darks to Update Acquisition Bad Pixel
Table Part III)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
daily dark calibration updates.  These daily darks are intended to identify
hot pixels for update to the acquisition on-board FSW hot pixel table.
Daily hot pixel lists can also be used for science data analysis.  The
observations were completed as planned, and no anomalies were reported.

   1.3 Completed NIC/1/2/3 7836 (Infrared Radiation from Middle-Aged Pulsars)

       The near Infrared Camera (Cameras One, Two and Three) was used to
make infrared observations of the middle-aged pulsar PSR-B0656.  The
spectral distributions indicate that both surface thermal emission and
non-thermal magnetospheric processes are present.  These components need to
be resolved before reliable tests of theories of neutron-star cooling and
non-thermal evolution can be made.  The observations were executed as
scheduled, and no anomalies were noted.

   1.4 Completed Two Sets of WF/PC-2 7909 (POMS Test Proposal: WF II
Parallel Archive Proposal)

       The WF/PC-2 was used to make parallel observations as part of the
POMS test proposal.  This test proposal is designed to simulate scientific
plans.  The observations were completed as planned, and no problems were
reported.

   1.5 Completed STIS/CCD 7926 (CCD Dark and Bias Monitor -- Continued)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
several dark and bias calibration observations.  This is to measure CCD
dark current and bias rates for the two supported amplifier settings {gain
= 1 and gain = 4} in order to gather data for making superdarks and
superbiases.  These observations will also track the growth of hot pixels
on the CCD in general and within the various target acquisition apertures
specifically.  The observations were executed as scheduled, and no
anomalies were noted.

   1.6 Completed Three Sets of STIS/CCD 7911 (STIS Galactic Plane Pure
Parallel Program)

       The Space Telescope Imaging Spectrograph (CCD) was used to make low
galactic latitude survey observations in parallel with the prime science
observations.  Short exposures with the 50CCD imaging mode will provide the
wavelength zero-point calibration.  These data will be placed immediately
into the Hubble Data Archive.  The observations were executed as scheduled,
and no anomalies were noted.

   1.7 Completed Two Sets of WF/PC-2 7625 (WF/PC-2 Cycle 7 Earth Flats)

       The WF/PC-2 was used to make a series of Earth flat calibration
images.  These flat fields will allow mapping of the OTA illumination
pattern and will be used in conjunction with previous internal and external
flats to generate new pipeline superflats.  The observations were completed
as planned, and no anomalies were reported.

   1.8 Completed NIC/2 7330 (The Fueling of Active Nucleii: A NICMOS
Snapshot Survey)

       The Near Infrared Camera (Camera Two) was used to probe the dark
matter distribution of NGC-1241 far from the center by observing
intervening absorption from the MgII doublet (lambda 2800) in the spectrum
of one background QSO located in a geometrically optimal position.  HST
observations are required because this feature is in a wavelength range not
accessible from the ground, and the QSO magnitudes and expected strength of
absorption make IUE observations unfeasible.  The proposal completed as
expected with no anomalies.

   1.9 Completed NIC/2 7327 (Elliptical Galaxy Evolution at High Redshift:
IR Imaging of 60 Distant Clusters)

       The Near Infrared Camera (Camera Two) was used to make infrared
observations high redshifted elliptical galaxies in galactic clusters
CL1144-123.  By measuring the structural properties of high redshift
cluster elliptical galaxies, it is hoped to resolve the controversy
regarding the age and formation history of bright cluster ellipticals.  The
observations were executed as scheduled, and no anomalies were noted.

   1.10 Completed Two Sets of NIC/2 7226 (Search for Massive Jupiters)

       The Near Infrared Camera (Camera Two) was used to make a corographic
search for massive planets around nearby, young main sequence star
HD102982.  Because of the extreme youth of this object, any low-mass brown
dwarf and planetary companions will still be in a higher luminosity phase
and thus easily detectable.  A dark calibration image was also taken.  The
observations were executed as scheduled, and no anomalies were noted.

   1.11 Completed STIS/CCD 7564 (High Redshift Galaxy Companions To Q1202-0725)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
slitless mode observations of the high redshifted galaxy companion
BR1202-07 to quasar Q1202-0725.  A wavelength calibration image was also
taken.  The observations were completed as planned, and no problems were
reported.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 10
                                        Successful :  9

       The acquisition scheduled at 078/053154Z failed.  The attitude was
good, and there were no stop, scan step, or search radius flags; however,
the FGSs were unable to maintain fine lock.  HSTAR 6401 was written.
NICMOS proposal 7901, STIS proposal 7911, and WF/PC-2 proposal 7909 (all
occurring during the period of tomorrow's report) were affected since the
take data flag remained down.

                          Scheduled Reacquisitions : 6
                                        Successful : 6

   2.2 FHST Updates:

                              Scheduled : 16
                             Successful : 16

   2.3 Operations Notes:

       The SSR correctable EDAC errors were cleared two times using ROP SSR-1.

       The ENGREP was reset using ROP NS-5.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH