HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1915

PERIOD COVERED:  0000Z (UTC) 07/08/97 - 0000Z (UTC) 07/09/97

Daily Status Report as of 190/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed NIC/1/2 7690 (NICMOS Pointed Super Flats)

       The Near Infrared Camera (Cameras One and Two) was used to make
super flat field calibration observations.  The observations will be used
to build high signal/noise ratio NICMOS flat fields for the different
filters.  As detailed in HSTAR 6116, the guide star acquisition for this
proposal defaulted to fine lock on FGS-2 only.  Any possible effect on
science has not been reported.  Otherwise, the observations were executed
as scheduled, and no anomalies were noted.

   1.2 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.

   1.3 Completed WF/PC-2 6904 (WF/PC-2 Cycle 6 Cal.:Darks)

       The WF/PC-2 was used to make a series of several dark calibration
images as part of a standard calibration within Cycle 6.  This calibration
procedure is performed once per week as part of an on going CCD calibration
to be used to monitor and characterize hot pixels.  The observations were
executed as scheduled, and no anomalies were noted.

   1.4 Completed Two Sets of WF/PC-2 6587 (Black Holes and Cores of
Early-Type Galaxies)

       The WF/PC-2 was used to make observations of early-type galaxies
NGC-1023, NGC-741 and NGC-7785 in order to study their nuclear core region
and their possible black holes.  The campaign to find black holes in the
centers of galaxies using HST has so far been highly successful.  The
observations were completed as planned, and no problems were reported.

   1.5 Completed Two Sets of 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 a high redshifted elliptical galaxy in the galactic clusters
CL1056+475.  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.

   1.6 Completed STIS/CCD 7276 (Synoptic Monitoring of Seasonal Phenomena
on Mars)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
seasonal ultraviolet imaging of the planet Mars.  This season includes the
formation of the north polar cap and hood system, a process which is not
well documented; the start of the classic dust storm season on Mars, when
large dust storms have often occurred; and an active cycle of small dust
storms in Hellas.  These observations will complete a period of continuous
monitoring of Mars which commenced in Cycle 6.  The observations were
completed as planned, and no problems were reported.


   1.7 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 FSC00235+1 in order determine if its luminous state is a result of
its being a gravitational lens system or of 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.

   1.8 Completed STIS/CCD 7700 (STIS Non-Scripted Parallel Archive Proposal)

       The Space Telescope Imaging Telescope (CCD) was used to obtain
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.  This suggests that star formation rates were higher than
at present,and that AGN may have been more frequent.  The low background
and high resolution of HST separates these objects from the background.
The proposal completed as planned, and no problems were reported.

   1.9 Completed NIC/1/2/3 7676 (NICMOS-One Orbit Parallel)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
conduct an on-orbit calibration procedure.  This was none in parallel with
the prime science observations.  The procedure was completed as scheduled,
and no anomalies were noted.

   1.10 Completed 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.

   1.11 Completed NIC/2 7157 (NICMOS Optimum Coronagraphic Focus Determination)

       The Near Infrared Camera (Camera Two) was used to make a series of
optimum coronagrphic focus determination measurements.  This test will
ascertain the optimum position of the PAM for maximizing the local contrast
ratios in coronagraphic images.  Because of the forward motion of the
NICMOS optical bench and dewar, the nominal operational position for the
PAM is set (for each camera) to achieve fraction limited focus at the image
plane formed at the detector.  The observations were completed as
scheduled, and no problems were reported.

1.12 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-3900.  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.

   1.13 Completed NIC/1/2/3 7328 (High Resolution IR Imaging Survey (IRIS)
of the Centers of the Nearest Active Galaxies)

       The Near Infrared Camera (Camera One, Two and Three) was used to
make high resolution, infrared observations of the nearest active galaxy
Markarian in order to study its inner nuclear region.  Observing in the
near-IR minimizes the dust obstruction and maximizes sensitivity to the old
stellar population which dominates the mass.  The  observations were
executed as scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 12
                                        Successful : 12

                          Scheduled Reacquisitions : 5
                                        Successful : 5

   2.2 FHST Updates:

                              Scheduled : 28
                             Successful : 28

   2.3 Operations Notes:

       The NICMOS Coronographic Hole Position was updated at 189/2306Z.

       The SSR Interrupt Log was dumped at 190/0217Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science and SMOV operations.

/DMH