HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2464

PERIOD COVERED:  0000Z (UTC) 09/23/99 - 0000Z (UTC) 09/24/99

Daily Status Report as of 267/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

   1.1 Completed WF/PC-2 8133 (The Starburst-ISM Interaction in NGC 1569)

       The WF/PC-2 was used to study the interstellar medium in the dwarf,
starbursting galaxy NGC-1569.  The central regions of the galaxy were imaged
using the Hydrogen-Alpha emission line.  The observations were executed as
scheduled, and no anomalies were noted.  

   1.2 Completed Two Sets of STIS/CCD 8545 (POMS Test Proposal: STIS
non-scripted parallel proposal continuation VI)

       The Space Telescope Imaging Spectrograph (CCD) was used to make low
galactic latitude, non-scripted parallel observations as part of a POMS test
proposal.  The observations were completed as planned, and no anomalies were
reported.  

   1.3 Completed STIS/CCD 7912 (STIS Parallel Archive Proposal - Nearby
Galaxies - Imaging and Spectroscopy)

       The Space Telescope Imaging Spectrograph (CCD) was used to make parallel
observations of nearby galaxies.  This survey will be useful to study the star
formation histories, chemical evolution, and distances to these galaxies. 
These data will be placed immediately into the Hubble Data Archive.  The
observations were completed as scheduled, and no problems were reported.  

   1.4 Completed WF/PC-2 8194 (Evolution of High-Redshift Seyfert Galaxies)

       The WF/PC-2 was used to make observations of the high-redshifted Seyfert
galaxy Gal-105009 in order to study its evolution.  The observations will
provide insights into the Seyfert phenomenon at intermediate redshift and will
complement similar HST studies of normal galaxies, clusters and quasars.  The
observations were executed as scheduled, and no anomalies were noted.  

   1.5 Completed STIS/CCD 8406 (POMS Test Proposal: STIS Non-Scripted Parallel
Proposal Continuation V)

       The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude observations taken in parallel with the prime science
observations as part of a POMS proposal.  This is a STIS non-scripted parallel
Condition V proposal.  The observations were completed as scheduled, and no
anomalies were reported.  

   1.6 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.  

   1.7 Completed WF/PC-2 8181 (Resolving Sirius-like Binaries)

       The WF/PC-2 was used to make observations of the star 14AURC in order to
try and resolve these Sirius-like binary star systems.  Subsequent
determinations of the visual orbits of the resolved binaries with the HST will
provide dynamical measurements of the white-dwarf masses.  The observations
were completed as scheduled, and no anomalies were reported.  

   1.8 Completed 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.  

   1.9 Completed STIS/CCD 7444 (Global Mapping of Molecular Oxygen on Ganymede)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of Jupiter’s largest moon Ganymede in order to map its molecular
oxygen.  This is to study the absorption bands in the spectrum of Ganymede's
trailing hemisphere that result from the presence of condensed molecular oxygen
trapped on the surface.  This is probably resulting from the bombardment of
water ice by the Jovian magnetospheric ions.  A wavelength calibration image
was also taken.  The observations were completed as planned, and no anomalies
were reported.  

   1.10 Completed WF/PC-2 8444 (WF/PC-2 CYCLE-8 Internal Monitor)

       The WF/PC-2 was used to make a bias, and an internal flat, observation
as part of a Cycle-8 monitoring program to monitor the health of the cameras. 
A variety of internal exposures are 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, and a monitor for possible buildup
of contaminants on the CCD windows.  The observations were executed as
scheduled, and no anomalies were noted.  

   1.11 Completed STIS/CCD/MA2 8342 (Abundances in Halo Stars and Galactic
Element Formation)

       The Space Telescope Imaging Spectrograph (MA1 and CCD) was used to make
observations of star HD221170 as part of a study of the abundances in halo
stars and galactic element formation.  The results for the very oldest galactic
stars will also provide an important, and independent, age determination for
the Galaxy and hence constrain cosmological age estimates.  A wavelength
calibration image was also taken.  The observations were executed as scheduled,
and no anomalies were noted.  

   1.12 Completed Two Sets of 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.  

   1.13 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.  

   1.14 Completed STIS/CCD/WF/PC-2 7388 (Black Holes and the Centers of
Galaxies)

       The Space Telescope Imaging Spectrograph (CCD) and the WF/PC-2 were used
to continue our survey of the center of nearby galaxy NGC-7457.  The major goal
is to survey an unbiased set of galaxies with a potentially wide range of black
hole masses.  The sample has been carefully chosen to optimize leverage on the
character of a proposed correlation of black hole mass with galaxy mass.  A
wavelength calibration image and a CCD flat mage were also taken.  The
observations were completed as scheduled with no anomalies.

   1.15 Completed 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.  

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions: 6
                                        Successful: 6

                         Scheduled Re-acquisitions: 8
                                        Successful: 8

   2.2 FHST Updates: 

                              Scheduled: 17
                             Successful: 17

   2.3 Operations Notes: 

       The SSR EDAC error counter was cleared twice as directed by ROP SR-1.

       HSTARs 7277 and 7278 were written for CCS problems.  The first
documented problems in the telemetry file catalog; the second, failures in a
historical request due to file privileges.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

       Continuation of normal science observations and calibrations.

/DMH