HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1930

PERIOD COVERED:  0000Z (UTC) 07/29/97 - 0000Z (UTC) 07/30/97

Daily Status Report as of 211/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 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.

   1.2 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.

   1.3 Completed NIC/2 7420 (A Near-Infrared Search for Very Low Mass
Companions to Stars Within 10 Parsecs of the Sun)

       The Near Infrared Camera (Camera Two) was used to make searching
observations for very low mass companions to a variable star.  This star is
known to be within 10 parsecs of the Sun.  The observations were executed
as scheduled, and no anomalies were noted.

   1.4 Completed WF/PC-2 6867 (The Great Attractor)

        The WF/PC-2 was used to measure velocity as a function of distance
for a string of elliptical galaxies starting at the Hydra-Centaurus
Supercluster and ending in the Shapley Supercluster.  Relative distance
measurements will be made from surface brightness fluctuations in PC images
of these galaxies with the aid of a new technique.  The proposal aims to
test the predictions of the Great Attractor model in which the microwave
dipole anisotropy is produced as a result of acceleration into a mass
concentration just beyond the Hydra Centaurus supercluster.  Cycle 6
targets are chosen to build on the Cycle 4 program.  The observations were
executed as scheduled with no anomalies.

   1.5 Completed Eight Sets of 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.  For the final iteration of this proposal, the acquisition
defaulted to guidance on one FGS only.  Any possible affects on science are
not currently known.  Otherwise, the observations were completed as
scheduled, and no further anomalies were noted.

   1.6 Completed Five Sets of STIS/CCD 7727 (STIS Non-Scripted Parallel
Archive Proposal)

       The Space Telescope Imaging Spectrograph (CCD) was used to obtain
parallel slitless spectroscopy with the G750L grating to search for
emission line galaxies at intermediate to high redshift.  Field galaxy
surveys have shown that at
high redshift most galaxies have strong emission lines, and are compact and
blue.  The observations were completed as planned, and no anomalies were
reported.

   1.7 Completed WF/PC-2 6436 (High-Resolution Narrow-Band Imaging of
Liners, in Search of Their Central Engines)

       The WF/PC-2 was used to make high-resolution, narrow-band
observations of the galaxy NGC4569 in order to search for its central
engine and to try to image its liner.  More than 30% of all galaxies
contain liner nuclei, which may be the weakest but most common
manifestation of quasar activity.  The observations were completed as
planned, and no problems were reported.

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

       The Near Infrared 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.

   1.9 Completed Two 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 6677 (The Origin of the X-Ray Background: What
are the Faintest X-Ray Galaxies?)

       The WF/PC-2 was used to make observations of the galaxy GAL-133458
which is from the deepest optically identified (ROSAT) X-ray survey yet.
These images were taken to determine the morphologies of the remaining
systems which we cannot study from the ground to determine whether the
remaining non-QSO XRB might be explained by emission from interacting or
disturbed spirals.  The observations were completed as planned, and no
anomalies were reported.

   1.11 Completed Three Sets of WF/PC-2 6793 (WF/PC-2 Support for the Mars
Pathfinder Mission)

       The WF/PC-2 was used to make observations of the planet Mars.  This
is to support the Pathfinder Mission to Mars.  Observations of Mars are
scheduled near opposition, one month prior to landing, and during the
landed phase of the Pathfinder Mission.  The observations were completed as
scheduled, and no problems were reported.

   1.12 Completed WF/PC-2 6639 (Star Clusters and The Duration of Starbursts)

       The WF/PC-2 was used to make observations of the star cluster
NGC-4670 in order to study the duration of its starbursts.  Starbursts are
a fascinating but poorly understood phenomenon that probably play a key
role in galaxy evolution.  The observations were completed as planned, and
no problems were reported.

   1.13 Completed Five Sets of STIS/MA2 7604 (Cycle 7 MAMA Dark Measurements)

       The Space Telescope Imaging Spectrograph (MA2) was used to make MAMA
dark measurements.  These darks will be used in later image reductions and
also trended over the instrument's life time as an indicator of the
detector's degradation or damage.  For the third iteration of this
proposal, the acquisition defaulted to guidance on one FGS only.  Any
possible affects on science are not currently known.  Otherwise, the
observations were completed as scheduled, and no further problems were
reported.

   1.14 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 fsc12509+3 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 acquisition for this proposal
defaulted to guidance on one FGS only.  Any possible affects on science are
not currently known.  Otherwise, the observations were completed as
planned, and no further anomalies were reported.

   1.15 Completed NIC/2 7331 (Near-IR Properties of the Bulges of Spiral
Galaxies)

       The Near Infrared Camera (Camera Two) was used to make infrared
observations of the bulge in spiral galaxy NGC-2082.  Near-IR data at HST
resolution are essential for correcting for the effect of dust and will
enable us to derive robust nuclear properties for the sample.  The
observations were executed as scheduled, and no anomalies were noted.

   1.16 Completed WF/PC-2 7429 (Uranus' Vertical Haze Structure and its
Variation With Latitude)

       The WF/PC-2 was used to make wide range ultraviolet observations of
the planet Uranus in order to study its vertical haze structure and its
variation with latitude.  The wide wavelength range allows determination of
aerosol sizes and spectral characteristics superior to previous work.  The
observations were executed as scheduled, and no anomalies were noted.

   1.17 Completed NIC/1/2/3 7775 (NICMOS Earth Flats)

       The Near Infrared Spectrograph Multi-Object Camera (NICMOS) was used
to make Earth flat calibration observations.  This proposal obtains a
series of Earth flats for a subset of narrow-, medium-and broad-band NIC 1,
2 and 3 filters.  These flats will be used to generate the master flats for
narrow-band filters and to determine the OTA illumination pattern as a
function of wavelength and camera.  The observations were completed as
scheduled, and no problems were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 12
                                        Successful : 12

       As described in HSTAR 6135, the acquisition at 210/1843Z defaulted
to fine lock backup on FGS #3 only when FGS #1 did not acquire fine lock.
Proposals mentioned in 1.5, 1.13, and 1.14 above may have been affected.

                          Scheduled Reacquisitions : 4
                                        Successful : 4


   2.2 FHST Updates:

                              Scheduled : 20
                             Successful : 20

   2.3 Operations Notes:

       The STIS Event Flag was cleared at 210/1256Z.

       The STIS Bad Pixel Table was updated at 210/1311Z.

       The SSR Interrupt Log was dumped at 210/2051Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH