HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1841

PERIOD COVERED:  0000Z (UTC) 03/24/97 - 0000Z (UTC) 03/25/97

Daily Status Report as of 084/0000Z

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 Four Sets of STIS/CCD 7092 (CCD Dark Rate and Read =
Noise)

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

   1.3 Completed Two Sets of WF/PC-2 7022 (WF/PC-2 SM97 Monitor)

       This calibration proposal is the routine internal monitor for =
WF/PC-2, to be run twice weekly to monitor the health of the cameras.  A =
variety of internal exposures were obtained in order to provide a monitor =
of the integrity of the CCD camera electronics in both bays (gain 7 and =
gain 15), a test for quantum efficiency in the CCDs, an internal check on =
the alignment of the WF/PC-2 optical chain, and a monitor for possible =
buildup of contaminants on the CCD windows.  This observation was =
completed as scheduled, and no anomalies were noted.

   1.4 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) MS0803.3+7 =
and MS1020.2+6.  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.

   1.5 Completed STIS/CCD 7099 (CCD Flat-Field Stability and Cosmetic =
Defect Fraction)

       These observations were used to verify cosmetic defect fraction on =
the CCD using flat-field images, and to  investigate flat-field stability =
over short (minutes) and
long (days)time intervals.  The observations were executed as scheduled, =
and no anomalies were noted.

   1.6 Completed Two Sets of FGS 7026 (Fold Flat 3 (FF3) Position =
Optimization for FGS-1R)

       The FGSs were used to make FF3 C FGS-1R S-curves which will be =
optimized to achieve a modulation within 10 per-cent of the maximum =
accepted value at a particular field location and to produce an =
acceptable set of S-curves over the entire FGS field of view.  The =
folding flat was adjusted using PSTOLs from the ground.  The observations =
were completed as planned and no problems were reported. 

   1.7 Completed S/C 5582 (FOC/48 Monthly Activation (Camera Section =
Only): Cycle 4) 

        This proposal was executed as scheduled, and no anomalies were =
noted. 

   1.8 Completed Two Sets of 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.

   1.9 Completed WF/PC-2 6905 (WF/PC-2 Cycle 6 Calibration: Internal =
Monitor)

       The WF/PC-2 was used to make several internal calibrations =
observations including biases and internal flats as part of a Cycle 6 =
calibrations procedure.  A variety of internal exposures are run weekly =
to verify and monitor the health of the camera.  The observations were =
executed as scheduled, and no anomalies were noted.

   1.10 Completed Two Sets of 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 objects S4-1749+70 and 1ES1249+17 in order to study their e =
nvironment and their host galaxies.  The goal is to investigate =
systematic trends in host galaxy type, unusual morphological features, =
nearby companion galaxies, etc.  The observations were executed as =
scheduled, and no anomalies were noted.

   1.11 Completed STIS/CCD 7067 (STIS CCD Point Source Acquisition =
(STIS10))

       The Space Telescope Imaging Spectrograph (CCD) was used to make =
observations of point source GD153.  This is to demonstrate ability of =
the STIS FSW to locate an isolated point source, determine the position =
of a spectroscopic slit, and position the target within the slit.  The =
observations were executed as scheduled, and no anomalies were noted. 

   1.12 Completed COSTAR/U FOC/96 7009 (FOC/COSTAR Initial Alignment)

       The Faint Object Camera (f/96) was used to make observations of =
HZ4.  The images will be analyzed to determine focus and coma =
aberrations, and to determine the adjustments to the COSTAR DOB and FOC =
M1 arm tilts that will remove these aberrations.  An internal flat =
calibration was also taken.  The observations were completed as planned, =
and no problems were reported. 

2.0 FLIGHT OPERATIONS SUMMARY:


2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 7
                                        Successful : 7

                          Scheduled Reacquisitions : 11
                                        Successful : 11

   2.2 FHST Updates: 

                              Scheduled : 8
                             Successful : 8

   2.3 Operations Notes: 

       There were no significant operational problems.

       The COSTAR FOS mirror was adjusted at 083/2156Z and 084/0103Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

       Continuation of SMOV activities.

/DMH