HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1974

PERIOD COVERED:  0000Z (UTC) 09/30/97 - 0000Z (UTC) 10/01/97

Daily Status Report as of 274/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed NIC/2 7693 (NICMOS Pupil Transfer Function)

       The Near Infrared Camera (Camera Two) was used to make observations
of P330E-Cal in order to perform a pupil transfer function observations.
The output of this program will be a two-dimensional surface fit that will
give the large scale corrections needed to flat-field the images to an
accuracy of about 2%.  Also, changes in the PSF will be measured as a
function of position within the cameras.  The observations were executed as
scheduled, and no anomalies were noted.

   1.2 Completed Two 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 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 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.

   1.4 Completed WF/PC-2 7786 (Pure Parallel Archive Survey - Continuation)

       The WF/PC-2 was used to make observations as part of an archival
survey program in which the images were taken in parallel with the prime
science observations.  These WF/PC-2 parallel observations were obtained in
the ultraviolet in a search for interesting objects.  The observations were
completed as planned, and no problems were reported.

   1.5 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.

   1.6 Completed WF/PC-2 7623 (WF/PC-2 Cycle 7 Internal Flats)

       The WF/PC-2 was used to make a set of internal Cycle 7 calibration
flats which are designed to monitor the pixel to pixel flat field response
and the visflat lamp degradation, as well as detect any possible changes
due to contamination.  The calibration observations were completed as
planned, and no problems were reported.

   1.7 Completed NIC/1/2/3 7474 (Searching for Low Mass Stars: the Mass
Function at the Hydrogen Burning Limit)

       The Near Infrared Camera (Cameras One, Two, and Three) was used to
look at the unprecedented IR imaging capabilities of NICMOS to study the
low-mass stars at the end of the main sequence in four nearby globular
clusters spanning a wide range of metallicity, precisely at the wavelength
corresponding to their maximum emission {~1.1 Mum}.  These observations
would complete our ongoing investigation by making it possible, for the
first time, to reliably count stars right down to and beyond the main
sequence H-burning limit, thus leaving no doubt as to whether the IMF
indeed drops there or starts rising once again close to the limit.  The
observation completed as planned with no problems.

   1.8 Completed Two Sets of STIS/CCD 7782 (STIS Non-Scripted Parallel
Archive Proposal - Half Orbit)

       The Space Telescope Imaging Spectrograph (CCD) was used for a
non-scripted parallel archive proposal (one-half orbit).  The observations
were executed as scheduled, and no anomalies were noted.

   1.9 Completed Four 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.

   1.10 Completed Three Sets of STIS/CCD 7783 (STIS Parallel Science)

        The Space Telescope Imaging Spectrograph (CCD) was used to make
observations taken in parallel with the prime science.  The observations
were completed, and no problems were reported.

   1.11 Completed Two Sets of 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-6384.  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.

   1.12 Completed WF/PC-2 6134 (Investigating the Nature of Circumstellar
Matter in Young Clusters)

     The WF/PC-2 was used to take broad band images of several young star
clusters associated with bright reflection nebulae in an attempt to detect
circumstellar (CS) material about the stars in these clusters.  The HST
data will be combined with ground based near-IR and millimeter data.  The
combined data is expected to determine the frequency distribution of CS
material and disks in undisturbed young clusters, the size and mass
distribution of CS nebulae, and the correlation of these properties with
stellar luminosity.  The observations were completed as scheduled, and no
problems were reported.

   1.13 Completed NIC/1/2/3 7729 (NICMOS Short One Orbit Parallel)

       The Near Infrared Camera (Cameras One, Two, and Three) was used to
obtain "JHK" imaging of sky regions while another instrument was prime.
These observations were  part of the short NICMOS one-orbit parallel
program.  The observations were executed as scheduled, and no anomalies
were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 10
                                        Successful :  9

       As described in HSTAR 6179, the acquisition at 274/053347Z defaulted
to fine lock on GFS-1 only.

                          Scheduled Reacquisitions : 8
                                        Successful : 8

   2.2 FHST Updates:

                              Scheduled : 17
                             Successful : 17

   2.3 Operations Notes:

       A STIS MCE-2 reset occurred at 273/185915Z, outside the SAA area.
MAMA2 high voltage was off at the time of the reset.  STIS MAMA recovery
(MCE-2) was accomplished via operations request at 273/2300Z.  No STIS
proposal was impacted.  HSTAR 6177 documents the event.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH