HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1924

PERIOD COVERED:  0000Z (UTC) 07/21/97 - 0000Z (UTC) 07/22/97

Daily Status Report as of 203/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed WF/PC-2 6740 (Hyper-Luminous IRAS Galaxies: Star
Formation, AGN or LENSES?)

       The WF/PC-2 was used to make observations of the hyper-luminous IRAS
galaxy FSC1220+09 in order determine if its luminous state is a result to
its being a gravitational lens system or an active galactic nuclei (AGN)
system.  This IRAS galaxy is known to emit an enormous amount of power
(>10^13 LSUN) in the far infrared.  The observations were completed as
planned, and no anomalies were reported.

   1.2 Completed Two Sets of STIS/MA1/MA2 7084 (Verification of Optical
Format of STIS MAMA Modes)

       The Space Telescope Imaging Spectrograph (MA1 and MA2) was used to
perform verification calibration observations of the optical format for the
MAMA modes and extreme MSM positions using the Cr/Pt/Ne lamp.  The
observations were executed as scheduled, and no anomalies were noted.

   1.3 Completed Three Sets of WF/PC-2 7621 (WF/PC-2 Cycle 7 Supplemental
Darks PT1/3)

       The WF/PC-2 was used to make supplemental dark calibration images.
This set of dark calibrations is intended to obtain three dark frames every
day to provide data for monitoring and characterizing the evolution of hot
pixels.  The observations were executed as scheduled, and no anomalies were
noted.

   1.4 Completed WF/PC-2 6104 (Deep Imaging of Globular Clusters in the
Coma Ellipticals)

       The WF/PC-2 was used to make deep observations of the central
nuclear region in super giant elliptical galaxy NGC-4874 which is located
in the Coma Galactic Cluster looking for globular clusters.  These data
will allow us to investigate the chemical enrichment history, mass
distribution, and formation efficiency of globular clusters within this
galaxy, and they will extend our study of these phenomena to a much richer
and denser galaxy environment than is accessible from ground-based imaging.
The observations were executed as scheduled, and no anomalies were noted.

   1.5 Completed NIC/1/2 7156 (Revised NICMOS Field Offset Mechanism Test)

       The Near Infrared Camera (Cameras One and Two) was used to conduct a
field offset mechanism test.  This test verifies the FOM's mechanical and
optical operation.  A dark calibration observation was also taken.  The
observations were completed as planned, and no problems were reported.

   1.6 Completed STIS/CCD 7659 (Daily Darks to Update Acquisition Bad Pixel
Table)

       The Space Telescope Imaging Spectrograph (CCD) was used to make dark
calibration images in order to update the acquisition bad pixel table.
Daily hot pixel lists can also be used for science data analysis.  The
observations were executed as scheduled, and no anomalies were noted.

   1.7 Completed Three Sets of NIC/1/2/3 7779 (NICMOS One Orbit Parallel -
Camera 3 Focus)

       The Near Infrared Camera Multi-Object Spectrograph (Cameras One, Two
and Three) was used to conduct a one-orbit camera focus test taken in
parallel with the prime science observations.  The tests were completed as
scheduled, and no anomalies were noted.

   1.8 Completed STIS/CCD 7635 (STIS CCD Hot Pixel Annealing)

       The Space Telescope Imaging Spectrograph (CCD) was used to test the
hot pixel annealing procedure.  The effectiveness of the CCD hot pixel
annealing process is assessed by measuring the dark current behavior before
and after annealing and by searching for any window contamination effects.
The observations were completed as planned, and no problems were reported.

   1.9 Completed Three Sets of STIS /CCD 7675 (STIS Non-Scripted Parallel
Archive Proposal)

       The Space Telescope Imaging Spectrograph (CCD) was used in the
parallel mode to obtain slitless spectroscopy with the G750L grating to
search for emission line galaxies at intermediate to high redshift.  The
observations were completed as planned, and no anomalies were reported.

   1.10 Completed WF/PC-2 6601 (Evolution of Binary Neutron Stars and Their
White Dwarf Companions: Part 2)

       The WF/PC-2 was used to make observations of the binary star
STAR-1455 which is known to be a neutron star with a white dwarf companion.
It is also a millisecond rate pulsar.  This is part of an on-going program
which is intended to enlarge the sample of known white dwarf companions as
new millisecond pulsars are discovered.  The observations were executed as
scheduled, and no anomalies were noted.

   1.11 Completed NIC/3 7780 (NICMOS Short One Orbit Parallel - Camera 3
Focus Test)

       The Near Infrared Camera (Camera #Three) was used to conduct a short
one orbit focus test which was conducted in parallel with the prime science
observations.  The observations were completed as scheduled, and no
anomalies were noted.

   1.12 Completed FGS 7682 (FGS #3 Blue Transfer Function Reference Search
Calibration)

       The Fine Guidance Sensor #3 was used to make observations of
candidate star HD176425 in order to perform the blue transfer function
reference search calibration.  This proposal will measure the transfer
function of a number of blue candidate stars in order to verify a single
star which can be used for the blue calibration of the Trans Mode.  The
observations were exected as scheduled, and no anomalies were reported.

   1.13 Completed NIC/1 7255 (NICMOS Observations of JVAS/CLASS
Gravitational Lenses)

       The Near Infrared Camera (Camera #One) was used to make observations
of the JVAS/CLASS, gravitational lens,  quasi-stellar source QSO-1601+4.
The JVAS/CLASS radio survey has been the most successful to date at finding
arcsecond-scale gravitational lenses, almost doubling the known number (11
lenses found of which 10 are new discoveries).  The observations were
executed as scheduled, and no anomalies were noted.

   1.14 Completed WF/PC-2 7619 (WF/PC-2 Cycle 7 Decontamination)

       The WF/PC-2 was used to conduct a Cycle 7 decontamination procedure.
Ultraviolet-blocking contaminants are removed, and hot pixels cured, by
warming the CCDs to +20C for 6 hours.  A variety of internal images are
taken before and after the decontamination in order to verify its success
and to monitor the instrument health.  The procedures were conducted as
scheduled, and no problems were reported.

   1.15 Completed STIS/MA1 7097 (STIS MAMA Vignetting, Spatial Resol. In
Spectroscopic Modes)

       The Space Telescope Imaging Spectrograph (MA1) was used to make
spectrographic observations of star GD153 in order to study the system's
vignetting and spatial resolution.  These observations are intended to
measure STIS relative response to a point source in the first order modes
along the slit direction.  The observations were executed as scheduled, and
no anomalies were noted.

   1.16 Completed WF/PC-2 6253 (Pure Parallel Archive Program)

       The WF/PC-2 was used to execute a pure parallel program taking
ultraviolet observations running concurrently with prime science
observations.  The intent is to search for extra-galactic sources with flux
excesses at 3000 A0 and galactic sources with excesses at 1600 A0.  The
observations were completed as planned, and no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 6
                                        Successful : 6

                          Scheduled Reacquisitions : 7
                                        Successful : 7

   2.2 FHST Updates:

                              Scheduled : 18
                             Successful : 18

   2.3 Operations Notes:

       The SSR Interrupt Log was dumped at 202/2013Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science and SMOV operations.

/DMH