HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1834

PERIOD COVERED:  0000Z (UTC) 03/13/97 - 0000Z (UTC) 03/14/97

Daily Status Report as of 073/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed WF/PC-2 7016 (WF/PC-2 SM97 UV Monitor And Cool Down =
Procedure)

       This operation was used as a post-SM97 cooldown 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

   1.2 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 QDOTULIR13.  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 WF/PC-2 6855 (The Disks Around Young Stellar Objects)

       The WF/PC-2 was used to make observations of the disk surrounding =
the young stellar object LKCA15.  Circumstellar material has been =
detected at 1.3 mm around about 50% of the young (T<10^6 yr) stellar =
objects in the Taurus-Auriga molecular cloud.  The observations permit an =
estimate of the material's spatial extent, mass and temperature.  The =
observations were executed as scheduled, and no anomalies were noted. 

   1.4 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-3310 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. 

   1.5 Completed WF/PC-2 6363 (The Environments and Host Galaxies of =
BL-Lac Objects)

       The WF/PC-2 was used to make snapshot survey observations of =
BL-Lac object MS1704.9+6 in order to study its environment and its host =
galaxies. The goal is to investigate systematic trends in host galaxy =
type, unusual morphological features, nearby companion galaxies, etc.  As =
documented in HSTAR 5977, the primary guide star acquisition scheduled =
for this proposal at 072/1115Z was late, and the take data flag went up =
later than anticipated.  One observation may have been affected.  =
Otherwise, the observations executed as scheduled, and no further =
anomalies were noted.

   1.6 Completed WF/PC-2 6583 (The Origin of the Alignment Effect: =
WF/PC-2 Imaging Polarimetry of High Redshift Radio Galaxies)

       The WF/PC-2 was used to make imaging polarimetry observations of =
the high redshifted galaxy 3C265.  These polarimetric observations are =
crucial to the understanding of the spectacular morphologies recently =
discovered in high redshift radio galaxies by HST, and to the =
investigation of morphological and evolutionary links between radio galaxi=
es and quasars.  The observation were completed as scheduled, and no =
anomalies were reported. 

   1.7 Completed STIS/CCD 7092 (CCD Dark Rate and Read Noise)

       Observations were taken to measure CCD dark current and gather =
data for making super darks.  A bias calibration was also completed.  The =
observations were completed as planned, and no anomalies were reported. 

   1.8 Completed WF/PC-2 6887 (A Photometric Search for Faint Companions =
to Nearby Stars)

       The WF/PC-2 was used to make a photometric search observations of =
the nearby star WOLF359 in order to look for possible companions.  The =
technique involves use of the Planetary Camera with wide band pass =
filters to photometrically measure for the presence of resolved dark =
companions.  The observations were executed as scheduled, and no =
anomalies were noted. 

   1.9 Completed WF/PC-2 6773 (The Bucher-Oemler Effect in Nearby =
Clusters of Galaxies)

       The WF/PC-2 was used to make observations of several starburst and =
post-starburst regions the nearby galaxies and the coma of DC2048-D19.  =
These data will be studied to determine what triggers major episodes of =
star formation and what physically undermines the observed Butcher-Oemler =
effect in more distant galaxies.  The acquisition for this proposal, =
scheduled for 072/215554, defaulted to fine lock backup on FGS #2 only.  =
HSTAR 5979 was written.  The observations completed as planned, and no =
further problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:


2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 9
                                        Successful : 9

       As described in 1.5, one acquisition occurred later than =
anticipated.  Also, as mentioned in 1.9, one acquisition defaulted to =
fine lock backup on one FGS.

                          Scheduled Reacquisitions : 5
                                        Successful : 5

   2.2 FHST Updates: 

                              Scheduled : 17
                             Successful : 17

   2.3 Operations Notes: 

       There were no significant operational problems.

       It was reported today in HSTAR 5980 that on 059/000400Z a NICMOS =
dewar thermal short occurred.  It was noted that unexpected changes began =
in the detector warmup rate and the vapor cooled shield cooldown rate.  =
Analysis indicated that a thermal short developed between the front of =
the coldwell and the front of the VCS in the vicinity of the C2 cold =
mask.  Thermal expansion of the frozen N2 in the tank has caused one or =
more light baffles mounted on the filter wheel housing (on the VCS) to =
contact the front of the coldwell, causing the VCS to cool and the =
coldwell to warm.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

       Continuation of SMOV activities.

/DMH