HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2443

PERIOD COVERED:  0000Z (UTC) 08/24/99 - 0000Z (UTC) 08/25/99

Daily Status Report as of 237/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Two Sets of STIS/CCD 8408 (STIS CCD Dark Monitor C8)

       The Space Telescope Imaging Spectrograph (CCD) was used to make a CCD
bias calibration observation.  This is to monitor the darks for the STIS CCD. 
The observations were executed as scheduled, and no anomalies were reported.  

   1.2 Completed Six Sets of WF/PC-2 8457 (UV Earthflats)

       The WF/PC-2 was used to make a ultraviolet Earth flat calibration
image.  This is to improve the quality of pipeline the ultraviolet flatfields. 
The observations were completed as scheduled, and no problems were reported.  

   1.3 Completed WF/PC-2 8345 (Multipolar Bubbles and Jets in Very Low
Excitation Planetary Nebulae - A WF/PC-2 H-Alpha Imaging Survey)

       The WF/PC-2 was used to make H-Alpha observations of the very low
excitation planetary nebula PK165-06D1 in order to study its multipolar bubbles
and jets.  Comparison of the morphology of this young PNe sample with more
evolved PNe populations will set new constraints on models for the production
of jet-like outflows and nebular evolution.  The observations were completed as
planned, and no problems were reported.  

   1.4 Completed Two Sets of WF/PC-2 8443 (WF/PC-2 Cycle-8 Supplemental Darks
pt1/3)

       The WF/PC-2 was used to obtain three dark frames every day to provide
data for monitoring and characterizing the evolution of hot pixels.  The
observations were completed as planned, and no problems were reported.  

   1.5 Completed Two Sets of WF/PC-2 8192 (A Snapshot Survey of Probable Nearby
Galaxies)
       The WF/PC-2 was used to make a snapshot survey images of a probable
nearby galaxies KK019 and E471-G06.  The census of galaxies in the Local Volume
of space is very incomplete, particularly at the faint end.  The observations
were executed as scheduled, and no anomalies were noted  

   1.6 Completed STIS/CCD 8410 (STIS CCD Hot Pixel Annealing C8)

       The Space Telescope Imaging Spectrograph (CCD) was used to assess the
effectiveness of the CCD hot pixel annealing process by measuring the dark
current behavior before and after annealing and by searching for any window
contamination effects.  In addition CTE performance is examined by looking for
traps in a low signal level flat.  The observations were completed as planned,
and no anomalies were reported.  

   1.7 Completed STIS/CCD 8409 (STIS CCD Bias Monitor C8)

       The Space Telescope Imaging Spectrograph (CCD) was used to make a CCD
bias calibration observation.  This is to monitor the bias in the 1x1, 1x2,
2x1, and 2x2 bin settings at gain=1, and 1x1 at gain = 4, to build up high-S/N
superbiases and to track the evolution of hot columns.  The observations were
executed as scheduled, and no anomalies were reported.  

   1.8 Completed Three Sets of WF/PC-2/STIS/CCD 7496 (Star Formation Histories
of Dwarf Irregular Galaxies II: the Old Populations of IC 1613 and Sextans A)

       The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were used
to make observations of the dwarf irregular galaxy IC1613.  Recent results from
the ground and from HST for different types of dwarf galaxies show that even in
these apparently simple stellar systems, a variety of different star formation
histories can be found.  The observations were executed as scheduled, and no
anomalies were noted.  

   1.9 Completed STIS/MA2 8426 (Cycle 8 MAMA Dark Measurements)

       The Space Telescope Imaging Spectrograph (MA2) was used to make a
routine Cycle-8 MAMA dark noise calibration measurement.  This proposal will
provide the primary means of checking on the health of the MAMA detectors. 
This is done through frequent monitoring of the background count rate.  The
observations were completed as planned, and no problems were reported.  

   1.10 Completed STIS/CCD 8172 (STIS Deep DLA Imaging Survey II)

       The Space Telescope Imaging Spectrograph (CCD) was used to make deep
observations of quasar/alpha galaxy Q2212-1626.  The HST imaging, together with
ground-based spectroscopy, will unify absorption-line studies and faint galaxy
imaging studies, providing a comprehensive picture of the history of assembly,
star formation, gas consumption, and chemical enrichment in the Damped
Lyman-Alpha galaxies.  The observations were executed as scheduled, and no
anomalies were noted.  

   1.11 Completed WF/PC-2 8090 (POMS Test Proposal: WF-II Parallel Archive
Proposal Continuation)

       The WF/PC-2 was used in the parallel mode to make some low galactic
latitude archive observations.  The program will be used to take parallel
images of random areas of the sky.  The observations were executed as
scheduled, and no anomalies were noted.  

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions: 6
                                        Successful: 6

                         Scheduled Re-acquisitions: 9
                                        Successful: 9

   2.2 FHST Updates: 

                              Scheduled: 13
                             Successful: 13

   2.3 Operations Notes: 

       Even though GSFC Internal Simulation #9 concluded yesterday evening, the
flight operations team continues to run from the back-up facility in Building
23, using the CCS “A” String.

       The SSR EDAC error counter was cleared three times, per ROP SR-1.

       A status buffer dump was attempted three times at 237/0806Z, per a
working copy of ROP NS-3 available on the CCS “A” string.  No memory file was
created.  The “I” channel was locked at WSGT, but the dump was not recognized
by the CCS FEP.  HSTAR 7232 was written.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

       Continuation of normal science observations and calibrations.

/DMH