HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2407

PERIOD COVERED:  0000Z (UTC) 07/02/99 - 0000Z (UTC) 07/06/99

Daily Status Report as of 187/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed STIS/CCD 8228 (The Black Hole Versus Bulge Mass Relationship
in Spiral Galaxies)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the galaxy NGC-4041 in order to study the black hole versus
bulge mass relationship in spiral galaxies.  A wavelength calibration image was
also taken.  The observations were executed as scheduled, and no anomalies were
noted. 

   1.2 Completed Five 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.  

   1.3 Completed WF/PC-2 7405 (A WF/PC-2 Search for Surviving Binary Companions
in SN Ia Remnants)

       The WF/PC-2 was used to search for binary companions in the class Ia
super nova remnant SN1006-Cen.  Type Ia supernovae {SNe Ia} are widely believed
to be explosions of white dwarfs undergoing binary mass accretion.  The
observations were completed as planned, and no anomalies were reported.  

   1.4 Completed Thirteen Sets of STIS/CCD 8406 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation V)

       The Space Telescope Imaging Spectrograph (CCD) was used to make both low
and 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.  

   1.5 Completed Two Sets of 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.  

   1.6 Completed Two Sets of WF/PC-2 8445 (WF/PC-2 Cycle 8 Earth Flats)

       The WF/PC-2 was used to make Cycle-8 Earth flat calibration
observations.  This is to obtain 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.  

   1.7 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 HD115444 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.  

   1.8 Completed Eight 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.  

   1.9 Completed WF/PC-2 6357 (The Nuclear Morphology of Elliptical Galaxies)

       The WF/PC-2 was used to make images of the early type, large, elliptical
galaxy NGC-3595 (taken from a list of 150 galaxies) in order to study its
nuclear morphology.  This survey will complement Illingworth’s snapshot study
of later Hubble types.  The observations were completed as scheduled, and no
anomalies were reported. 

   1.10 Completed Five Sets of FGS 8102 (FGS Astrometry of the Extrasolar
Planet of GL876)

       The Fine Guidance Sensors were used to make astrometric observations of
a extrasolar planet which is orbiting the M4 class dwarf star GL876.  This will
help determine the planet’s mass.  The observations were completed as planned,
and no problems were reported.  

   1.11 Completed WF/PC-2/STIS/CCD 8169 (HST-Galileo Io Campaign)

       Both the WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were
used to make observations of Jupiter’s moon Io.  Io plays a central role in the
Jovian system, yet the mechanisms that couple its volcanoes, the tenuous
atmosphere, the escaping corona and the plasma torus remain elusive.  In 1999
there is the unique opportunity to combine HST observations with the Galileo
close flybys of Io.  The observations were completed as planned, and no
problems were reported.  

   1.12 Completed WF/PC-2 8095 (Accurate Proper Motions of Galactic Halo
Populations)

       The WF/PC-2 was used to make observations of the galaxy NGC-5272 in
order to study the proper motion of its galactic halo population, which include
globular clusters and dwarf galaxies.  The proper motions of these populations
will be determined to unprecedented accuracy, approximately an order of
magnitude better than has been previously possible.  The observations were
executed as scheduled, and no anomalies were noted.  

   1.13 Completed STIS/CCD 8470 (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 VI proposal.  The observations were completed as scheduled, and no
anomalies were reported.  

   1.14 Completed WF/PC-2 6967 (Blue Continuum Snapshots of 3CR Radio -
Continued Galaxies)

       The WF/PC-2 was used to make observations of the radio galaxy 3C305.0. 
Radio galaxies are an important class of extragalactic objects: they represent
one of the most energetic astrophysical phenomena and they may be used as
probes of their environments.  They are unique probes of the early Universe. 
The observations were completed as planned, and no problems were reported.  

   1.15 Completed STIS/CCD 8416 (CCD Full-Field Sensitivity Monitor C8)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of globular cluster  NGC-5139 (a.k.a., Omega Cen) as part of a CCD
Full-Field Sensitivity Monitor (Cycle 8).  These observations also provide a
check of the astrometric and point spread function stability of the instrument
over its full field of view.  The observations were completed as planned, and
no anomalies were reported.  

   1.16 Completed WF/PC-2 6362 (Supernova Host Galaxy)

       The WF/PC-2 was used to make observations of the supernova host galaxy
GAL-101033.  The observations were executed as scheduled, and no anomalies were
noted.

   1.17 Completed Four Sets of 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 galaxies CL-ULIR013, CL-ULIR021, QDOTULIT02 and QDOTULIR01. 
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.

   1.18 Completed FOC/96 6349 (Snapshot Search for High Redshift QSOs with
Far-UV Flux)

       The Faint Object Camera (f/96) was used to make snapshot images of the
quasi-stellar object Q1157+317.  This is to determine if this high redshifted
object has a far ultraviolet flux.  The observations were executed as
scheduled, and no anomalies were noted.

   1.19 Completed WF/PC-2 8243 (SINS: The Supernova Intensive Study - Cycle 8)

       The WF/PC-2 was used to make observations of supernova SN1998S. 
Supernovae reveal the last stages of stellar evolution, create the chemical
history of the Universe, energize the interstellar gas, and occupy the center
of attention for the extragalactic distance scale and cosmology.  A wavelength
calibration image was also taken.  The observations were completed as planned,
and no problems were reported.  

   1.20 Completed STIS/MA1 8424 (MAMA Sensitivity and Focus Monitor C8)

       The Space Telescope Imaging Spectrograph (MA1) was used to make
observations of object GRW+70D582 in order to measure the sensitivity and to
focus monitor C8.  This also is to monitor sensitivity of each MAMA grating
mode to detect any change due to contamination or other causes, and to monitor
the STIS focus in a spectroscopic mode.  A wavelength calibration was also
taken.  The observations were completed as planned, and no anomalies were
reported.  

   1.21 Completed STIS/CCD/MA1 8308 (The FUV Spectrum of SS 433)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to make
far-ultraviolet spectrographic observations of V1343-Aql (a.k.a., X-ray binary
SS-433).  The unexplored far-ultraviolet region should offer significant clues
about the nature of the mass-losing star and mass loss by winds.  A wavelength
calibration image was also taken.  The observations were executed as scheduled,
and no anomalies were noted.  

   1.22 Completed Three Sets of WF/PC-2/STIS/CCD 8267 (Taking the Measure of
Planets in the Globular Cluster 47 Tucanae)

       Both the WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were
used to make observations of the globular cluster NGC-104 (a.k.a., Globular
Cluster 47 Tucanae) to search for stars with planetary companions in close
orbits.  HST is uniquely capable of providing the requisite, high-dynamic
range, time-series photometry.  These observations extended over a several day
period.  The observations were executed as scheduled, and no anomalies were
noted.  

   1.23 Completed Two Sets of WF/PC-2 8442 (WF/PC-2 Cycle 8 Standard Darks)

       The WF/PC-2 was used to make a series of Cycle 8 standard dark
calibration observations.  This dark calibration program obtains dark frames
every week in order to provide data for the ongoing calibration of the CCD dark
current rate, and to monitor and characterize the evolution of hot pixels.  The
observations were executed as scheduled, and no anomalies were noted.  

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 26
                                        Successful : 26

                          Scheduled Reacquisitions : 46
                                        Successful : 46

   2.2 FHST Updates: 

                              Scheduled : 40
                             Successful : 40

   2.3 Operations Notes: 

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

       Using ROP NS-3, the NSSC-1 status buffer was dumped at 183/1138Z.

       The STIS MCE-2 reset twice, at 183/201521 and at 184/184645Z.  In each
case, the low voltage was on and the vehicle was in an SAA interval.  Using ROP
NS-12, each time the STIS flight software error counter was reset.  In the
first case, the MAMA-2 was recovered via normal SMS commanding, at the time of
the next high voltage turn-on.  The same will happen for the second occurrence,
but such a turn-on is not scheduled in this week’s SMS.  

       For the weeklong proposal, WF/PC-2/STIS 8267 (see 1.22 above), there has
been and will be an exceptionally high volume of science data.  Thus far, all
acquisitions, re-acquisitions, and data recovery operations have been nominal.

       As directed by an operations request, the NICMOS FPA temperature sensor
for detector 2 was enabled at 186/1048Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

       Continuation of normal science observations and calibrations.

/DMH