HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2364

PERIOD COVERED:  0000Z (UTC) 05/03/99 - 0000Z (UTC) 05/04/99

Daily Status Report as of 124/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Five Sets of WF/PC-2 7713 (WF/P-2 Cycle 7 Supplemental
Darks pt3/3)

       The WF/PC-2 was used to make supplemental dark calibration images.
This dark calibration program obtains 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 anomalies were noted.

   1.2 Completed STIS/CCD 7949 (CCD Dark and Bias Monitor -- Cont. to June 99)

       The Space Telescope Imaging Spectrograph (CCD) was used to conduct a
CCD dark calibration and a bias monitoring program.  It was also scheduled
to track the growth of hot pixels on the CCD in general and within the
various target acquisition apertures specifically.  The observations were
executed as scheduled, and no anomalies were noted.

   1.3 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-2775 in order to study its central bulges.  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.

   1.4 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 Q1223+1753.  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.

   1.5 Completed WF/PC-2 8053 (WF/PC-2 Cycle-7 Earth Flats -- Part II)

       The WF/PC-2 was used to take Earth flat calibration images.  This
proposal obtains sequences of Earth streak flats to construct high quality
flat fields for the WF/PC-2 filter set.  The observations were executed as
scheduled, and no anomalies were noted.

   1.6 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.

   1.7 Completed WF/PC-2 7279 (The Impact of Cluster Substructure on
Galaxies: A Case Study in ABELL 2125)

       The WF/PC-2 was used to make observations of the Abell-2125 galactic
cluster (a.k.a., the Butcher-Oemler Cluster) in order to study the impact
of the substructure of the cluster on galaxies.  The VLA data show that, as
well as a large blue-galaxy fraction {0.19} for its redshift, it has an
unprecedented number of radio galaxies {30 with confirmed redshifts},
evenly split between old stellar populations and starbursting galaxies.
The observations were executed as scheduled, and no anomalies were noted.

   1.8 Completed STIS/CCD 8393 (POMS Test Proposal: STIS Non-Scripted
Parallel Proposal Continuation IV)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
POMS, non-scripted, low galactic latitude observations made in parallel
with the prime science observations.  The observations were executed as
scheduled, and no anomalies were noted.

   1.9 Completed WF/PC-2 7628 (WF/PC-2 Cycle 7 Photometric Characterization)

       The WF/PC-2 was used to make observations of GRW+70D582 as part of a
photometric characterization calibration observation.  This is to determine
whether any changes in the zeropoint, the spatial dependence of the
zeropoint, or contamination rates have occurred.  The observation was
executed as scheduled, and no anomalies were reported.

   1.10 Completed STIS/CCD 8081 (STIS CCD Hot Pixel Annealing)

       The Space Telescope Imaging Spectrograph (CCD) was used to make a
dark and a bias calibration observation.  The effectiveness of the CCD hot
pixel annealing process is assessed by measuring the dark current behavior
before and after annealing and by searching for any window contamination
effects.  The observations were executed as scheduled, and no anomalies
were noted.

   1.11 Completed WF/PC-2 6358 (UV Imaging of Circumnuclear Starburst Rings)

       The WF/PC-2 was used to make ultraviolet snapshot observations of
galaxy NGC-4314 in order to study its circumnuclear starburst rings.  A
homogeneous database of properties of the star-forming region will be
generated.  The observations were executed as scheduled, and no anomalies
were noted.

   1.12 Completed Two Sets of WF/PC-2 7343 (Photometric Survey of Galaxies
lying Behind Gravitational Lens Cluster)

       The WF/PC-2 was used to make an extensive photometric survey of the
galaxies lying behind the exceptional gravitational lens cluster A2218.
The distortion of these images has been mapped from the ground, and shows
one of the strongest signals to date, but the signal to noise is still
limited.  Using WFPC2 images we show that with two orbits on each of 22
fields covering the cluster we will obtain approximately 10000 galaxies
over a region extending to 0.9 Mpc/h from the cluster center.  The loss of
lock mentioned in 2.1 and documented in HSTAR 7118, occurred during the
first iteration of this proposal, near the end of this seven-hour proposal.
Otherwise, the observations were completed with no further reported
problems.

2.0 FLIGHT OPERATIONS SUMMARY

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 4
                                        Successful : 4

       As documented in HSTAR 7118, there was a loss of lock at 123/1832Z.
The proposal described in 1.12 was affected.

                          Scheduled Reacquisitions : 6
                                        Successful : 6

   2.2 FHST Updates:

                              Scheduled : 6
                             Successful : 6

   2.3 Operations Notes:

       The operations team continues its stay in the SAMS back-up facility.

       Using ROP SR-1, the SSR EDAC erroro counter was cleared four times.

       As directed by ROP RD-7, ESTR re-conditioning was performed at
124/0018Z.

       The STIS flight software error counter was cleared at 124/0642Z per
ROP NS-12.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH