HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1850

PERIOD COVERED:  0000Z (UTC) 04/04/97 - 0000Z (UTC) 04/07/97

Daily Status Report as of 097/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed WF/PC-2 6352 (Dwarf Elliptical Galaxy Snapshots)

       The WF/PC-2 was used to survey FCC150, from a sample of 30 dwarf =
elliptical galaxies.  The observations were completed as planned, and no =
anomalies were reported.

   1.2 Completed WF/PC-2 6346 (Snapshot Survey of the Ultraluminous IRAS =
Galaxy Sample-Part 1 High)

       The WF/PC-2 was used to make snapshot survey observations of the =
ultraluminous IRAS galaxy IR02364-47.  These data will be searched for =
multiple cores, which imply a merger has occurred, and for starburst =
regions.  The observations were executed as scheduled, and no anomalies =
were noted.

   1.3 Completed NIC /2 7116 (Ultraluminous IR Galaxies)

       The Near Infrared Camera #2 was used to make observations of the =
ultraluminous infrared galaxy APR220.  The luminous IRAS galaxies are =
probably powered by nuclear starbursts and/or central AGNs: many of these =
systems exhibit evidence of recent galactic interaction or merging.  A =
dark calibration image was also taken.  The observations were executed as =
scheduled, and no anomalies were noted. 

   1.4 Completed WF/PC-2 6906 (WF/PC-2 Cycle 6 Calibration: Internal =
Monitor-Visual Flats)

       The WF/PC-2 was used to make internal calibration, visual flat =
images as part of the Cycle 6 internal monitoring of the instrument's =
operations.  This proposal defines the standard series of internal flat =
fields, which will be executed twice per month.  The observations were =
completed as planned, and no anomalies were reported.

   1.5 Completed WF/PC-2 6903 (WF/PC-2 Cycle 6 Calibration: =
Decontamination)

       The WF/PC-2 was used to make several calibration bias =
observations, internal flats, K-Spot images and dark calibration images =
which are all part of a Cycle 6 decontamination procedure.  No science =
was interleaved with the dark exposures.  The observations were completed =
as scheduled, and no problems were reported.

   1.6 Completed STIS/CCD 7122 (Imaging of SN1987A and its Nebula)

       The Space Telescope Imaging Spectrograph (CCD) was used to make =
observations of the supernova remnant LMC-SN1987 and its associated =
nebula.  This object is located in the Large Magellanic Cloud.  Supernova =
1987A is a once-in-a-lifetime event that enhances our understanding of =
the late stages of the stellar evolution, the supernova explosion =
mechanism, and the interaction of the explosion with the circumstellar =
medium.  The observations were executed as scheduled, and no anomalies =
were noted. 

   1.7 Completed WF/PC-2 6360 (A Snapshot Survey of "Radio Loud" IRAS =
Galaxies)

       The WF/PC-2 was used to make snapshot survey observations of the =
"radio loud" IRAS galaxy GAL-0925+0.  The WF/PC-2 was used to discern =
high surface brightness structures in its post-starburst active nuclear =
regions.  The observations were completed as scheduled, and no anomalies =
were reported.

   1.8 Completed WF/PC-2 6452 (Global and Temporal Coverage of a =
Atmospheric Regions of the Planet Jupiter)

       The WF/PC-2 was used to make observations of selected regions of =
the planet Jupiter in order to investigate its atmospheric dynamics.  =
These data will be used in the interpretations of the observations made =
from the Galileo Mission.  The observations were executed as scheduled, =
and no anomalies were noted.

   1.9 Completed STIS/CCD 7063 (STIS SMOV CCD Contamination Monitor)

       The Space Telescope Imaging Spectrograph (CCD) was used to make =
observations of standard star GD153 in order to  measure flux and look =
for any gross changes over time that might indicate contamination.  The =
observations were completed as scheduled, and no anomalies were reported. =


   1.10 Completed WF/PC-2 7016 (WF/PC-2 SM97 UV Monitor And Cool Down =
Procedure)
10;
       This operation was used as a post-SM97 cool down of the WF/PC-2 =
CCD to -88C with frequent monitoring of contamination via standard star =
GRW+70D582 observations in filter F170W.  An internal flat and a dark =
calibration image were also taken.  The observations were completed as =
planed, and no problems were reported

   1.11 Completed Two Sets of WF/PC-2 6361 (High Resolution Imaging of =
X-Ray Selected AGNs)

       The WF/PC-2 was used to make high resolution  observations of the =
known, low, red-shifted, x-ray active galactic nuclei (AGN) MS2128.3+0 =
and MS0450.3-1.  These data will allow a study of the optical properties =
of an unbiased sample of AGN host galaxies.  The observations were =
completed as scheduled, and no problems were reported.

   1.12 Completed WF/PC-2 6359 (Core Properties of the Bulges of Spiral =
Galaxies)

       The WF/PC-2 was used to make snapshot survey observations of =
spiral galaxy NGC-7421 in order to study its central bulge.  The aim is =
to investigate the core properties, correlations with global galactic =
properties, and the frequency of occurrence of multiple and/or =
miscentered nuclei.  The observations were completed as scheduled, and no =
anomalies were noted.

   1.13 Completed NIC/1/2/3 7150 (NICMOS Coarse Optical Alignment, Part =
2)

       The Near Infrared Camera (Cameras 1, 2 and 3) were used to make =
observations of NGC-3603 as part of a coarse optical alignment procedure. =
 The purpose of this activity is to perform a series of iterative =
adjustments of the NICMOS pupil alignment mechanism to monitor focus & =
tilt.  During this proposal, the first acquisition default to fine lock =
on FGS #2 only (mentioned in 2.1) occurred.  Otherwise, the observations =
executed as scheduled. 

   1.14 Completed Two Sets of  WF/PC-2 6807 (The Spatial Distribution of =
Dust Extinction Through Spiral Disks)

       The WF/PC-2 was used to make observations of the spiral galaxy =
UGC-5041 in order to study the distribution of dust within its spiral =
arms.  There are background, early-type galaxies which shine light =
through the disk of a foreground spiral.  These systems provide an =
excellent opportunity to map with high spatial resolution the dust =
extinction.  The observations were completed as scheduled, and no =
anomalies were reported. 

   1.15 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 =
IC4329 and NGC-5061 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 we=
re completed as planned, and no problems were reported. 

   1.16 Completed WF/PC-2 6902 (WF/PC-2 Cycle 6 Photometric Calibration =
Monitor UV/OPT STD)

       The WF/PC-2 was used to make both ultraviolet and optical =
photometric observations of the standard star GRW+70D582 as part of a =
Cycle 6 calibration procedure.  These observations were done immediately =
before and after decontamination procedures.  The observations were =
completed as planned, and no problems were reported. 

   1.17 Completed Two Sets of WF/PC-2 6908 (WF/PC-2 Cycle 6 Cal: UV Flat)

       The WF/PC-2 was used to make ultraviolet flats and dark =
calibration images as part of a Cycle 6 Calibration Plan.  The =
observations were executed as planned, and no anomalies were reported. 

   1.18 Completed WF/PC-2 7018 (WF/PC-2 Cycle 6/ SMOV Lyman-Alpha Check)

       Observations were made to measure the far-UV (Lyman-Alpha) =
throughput, so as to quantify any contamination of the WF/PC-2 pick-off =
mirror caused by SMOV activities.  These observations were made using =
standard star WD0310-688.  The observations were completed as planned, =
and no anomalies were noted. 

   1.19 Completed Two Sets of NIC 1/2 7117 (Near-Infrared Observations of =
NGC-6611 (M16))

       The Near Infrared Cameras One and Two were used to make =
observations of the nebular NGC-6611 (aka, M-16 (The Eagle)).  HST =
WF/PC-2 images of the Eagle Nebula (NGC 6611) have revealed the presence =
of a population of dense globules that have been uncovered as their =
surroundings are photo-evaporated.  NICMOS images in three bands will not =
only allow us to conduct a better census of stellar objects in the field, =
but will also allow the objects to be placed on the H-R diagram and their =
evolutionary state to be assessed.  During the first iteration of this =
proposal, the second of the acquisition default to fine lock on FGS #2 =
only (mentioned in 2.1) occurred.  Otherwise, the observations were =
completed as scheduled.

   1.20 Completed WF/PC-2 6579 (The Cosmic Velocity of the Great =
Attractor)

       The WF/PC-2 was used to make observations of the galaxy ESO507-G04 =
which is located in the Centaurus Cluster.  The objective is to measure =
its distance, using the "surface brightness fluctuation" method.  When =
combined with the radial velocity, these measurements will allow the =
investigator to determine whether the Centaurus Cluster is falling into =
the Great Attractor.  The observations were executed as scheduled, and no =
anomalies were noted.

   1.21 Completed WF/PC-2 6419 (Testing Unified Models With a Complete =
Sample of Seyfert Galaxies)

       The WF/PC-2 was used to make observations of the Seyfert galaxy =
NGC-5273 to help build a complete survey of the Seyfert class of =
galaxies.  This will help test the current model for Seyfert class =
galaxies.  This model proposes that all Seyferts have Seyfert-1 nucleii, =
which are surrounded by a torus of gas and dust.  The observations were =
completed as planned and no anomalies were noted.

   1.22 Completed WF/PC-2 6344 (Low - Mass Binaries in the Hyades - =
Completing the Survey)

       The WF/PC-2 was used to make observations of the low mass binary =
star RHY101 (M-Class Dwarf Stars) which is located in the Hyades Cluster. =
 During this proposal, the acquisition failure mentioned in 2.1 occurred, =
affecting two of the observations.  Otherwise, the observations executed =
as scheduled, and no further anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 25
                                        Successful : 24

       Per HSTAR 6013, the acquisition at 096/224726Z failed when the =
scan steps limit was exceeded.

       Two other acquisitions, at 095/064000Z and at 096/042118Z, =
defaulted to fine lock backup on FGS #2 only when the scan steps limit =
was exceeded.  HSTARs 6008 and 6011 were written.

                          Scheduled Reacquisitions : 23
                                        Successful : 23


   2.2 FHST Updates: 

                              Scheduled : 44
                             Successful : 43

       The update at 097/0318Z failed.

   2.3 Operations Notes: 

       No significant operations problems occurred over the weekend.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

       Continuation of normal science and SMOV operations.

/DMH