HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2203

PERIOD COVERED:  0000Z (UTC) 09/04/98 - 0000Z (UTC) 09/08/98

Daily Status Report as of 251/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Ten Sets of WF/PC-2 7712 (WF/PC-2 Cycle 7 Supplemental
Darks pt2/3)

       The WF/PC-2 was used to make a series of Cycle 7 supplemental
calibration darks.  This dark calibration program obtains three dark frames
every day to provide data for monitoring and characterizing the evolution
of hot pixels.  As documented in HSTAR 6649 and in section 2.1, the
acquisition for the fourth and fifth iterations of this proposal failed and
the take data flag remained down.  Then, during the ninth iteration, the
loss of lock described in HSTAR 6651 and 2.1 occurred, temporarily taking
down the take data flag.  Otherwise, the observations were executed as
scheduled, and no further anomalies were noted.

   1.2 Completed Seven Sets of STIS/CCD 7948 (CCD Dark and Bias Monitor --
Cont. to Dec. 98)

       The Space Telescope Imaging Spectrograph (CCD) was used to measure
CCD dark current and bias rates for the two supported amplifier settings
{GAIN=1 and GAIN=4} in order to gather data for making superdarks and
superbiases.  The data will be used to track the growth of hot pixels on
the CCD in general and within the various target acquisition apertures
specifically.  As documented in HSTAR 6649 and in section 2.1, the
acquisition for the third iteration of this proposal failed and the take
data flag remained down.  Otherwise, the observations were executed as
scheduled, and no further anomalies were noted.

   1.3 Completed NIC/3 7901 (NICMOS Post-Campaign Focus
Monitoring)

       The Near Infrared Camera (Camera Three) was used to make some
post-campaign focus monitoring observations by using star cluster NGC-3603.
This proposal is used to determine and monitor the optimal focus and tilt
settings for all three NICMOS cameras after the first NIC/3 observing
campaign.  The observations were executed as scheduled, and no anomalies
were noted.

   1.4 Completed Eighteen Sets of STIS/CCD 8062 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation)

       The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude observations take in parallel with the prime science
observations.  As documented in HSTAR 6649 and in section 2.1, the
acquisition for the ninth iteration of this proposal failed and the take
data flag remained down.  Otherwise, the observations were completed as
planned, and no further problems were reported.

   1.5 Completed Five Sets of WF/PC-2 7909 (POMS Test Proposal: WF II
Parallel Archive Proposal)

       The WF/PC-2 was used to make parallel observations as part of the
POMS test proposal.  This test proposal is designed to simulate scientific
plans.  The observations were completed as planned, and no problems were
reported.

   1.6 Completed Two Sets of STIS/CCD 8064 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal - Backup)

       The Space Telescope Imaging Spectrograph (CCD) was used to conduct a
non-scripted parallel POMS test.  As documented in HSTAR 6649 and in
section 2.1, the acquisition for the second iteration of this proposal
failed and the take data flag remained down.  Otherwise, the observations
were completed as scheduled, and no further problems were reported.

   1.7 Completed WF/PC-2 7386 (A Snapshot Survey of Nova Shells)

       The WF/PC-2 was used to make observational images of the super nova
shell V443-SCT in order to detect and measure its expanding gaseous shell.
These observations will trace the distribution of hot and cool gas in the
nova shells, and show their degree of inhomogeneity on both large and small
scales.  The observations were completed as scheduled, and no problems were
noted.

   1.8 Completed NIC/2 7887 (A Survey of Gravitational Lenses as
Cosmological Tools II)

       The Near Infrared Camera (Camera Two) was used to make observations
of the gravitational lens candidate system Q2149-2745.  The propose is to
extend our IR survey of gravitational lenses and gravitational lens
candidates by obtaining NICMOS images of 14 additional lens systems or
candidates.  The observations were executed as scheduled, and no anomalies
were noted.

   1.9 Completed WF/PC-2 6761 (The Origin of Shock Emission in
Proto-Planetary Nebulae)

       The WF/PC-2 was used to make observations of the bi-polar
proto-planetary nebula PK118+08D1 in order to study the origin of its shock
emissions. The objective is to characterize the mass loss during the
transition to planetary nebula status. The observations were executed as
scheduled, and no anomalies were noted.

   1.10 Completed Two Sets of NIC/1/2 8077 (NICMOS Linearity Calibration)

       The Near Infrared Camera (Cameras One and Two) was used to make
linearity calibration observations.  The purpose of this proposal is to
obtain on-orbit NICMOS linearity correction data which sufficiently samples
in the linear region of the response curve.  The observations were
completed as scheduled, and no anomalies were noted.

   1.11 Completed WF/PC-2 7622 (WF/PC-2 Cycle 7 Internal Monitor)

       The WF/PC-2 was used to make a set of Cycle 7 internal monitoring
calibration measurements.  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.  A bias calibration and an internal flat calibration image were
also taken.  The observations were executed as scheduled, and no anomalies
were noted.

   1.12 Completed STIS/MA1 7298 (A Snapshot Survey for UV bright Quasars at
redshift below 3)

       The Space Telescope Imaging Spectrograph (MA1) was used to make
ultraviolet snapshot observations  of the bright quasar SBS1340+60 which
has a redshift (Z) below 3.0.  The goal is to find quasars bright enough in
the ultraviolet for spectroscopic follow-up in the range 900 -- 1200
Angstroms.  A wave length calibration image was also taken.  The
observation were completed as scheduled, and no anomalies were reported.

   1.13 Completed STIS/CCD/NIC/1/2/3/WF/PC-2 7566 (Demographics of Nuclear
Black Holes)

       The Space Telescope Imaging Spectrograph (CCD), the WF/PC-2 and the
Near Infrared Camera (Cameras One, Two and Three) were used to make
observations of normal galaxy M-32 to try and detect a super massive black
hole.  A dark and wavelength calibration images were also taken.  The
observations were executed as scheduled, and no anomalies were noted.

   1.14 Completed NIC/1/2/3 7227 (A Search for Low Mass/Sub-Luminous
Companions to M-Stars)

       The Near Infrared Camera (Camera One, Two and Three) was used to
make a search for low mass/sub-luminous companions to the low mass M class
star G173-39.  Knowledge of stellar and sub-stellar masses and luminosities
at and below the ~0.08 M{sun} H-burning limit is of fundamental importance.
A dark calibration image was also taken.  The observations were completed
as planned, and no problems were reported.

   1.15 Completed WF/PC-2 6651 (WLR Distances from Accurate Multi-Color
WF/PC-2 Photometry of A & B Supergiants in M-31 and M-33)

       The WF/PC-2 was used to make multi-color photometric observations of
NGC-598 (a.k.a., M-33).  This is to study A and B supergiant stars in M-31
and M-33 with a precision far exceeding that of existing ground-based
estimates.  The observations were completed as planned, and no problems
were reported.

    1.16 Completed Three Sets of NIC/2/3 8063 (NICMOS Pure Parallel Sponge
- Backup)

       The Near Infrared Camera (Cameras Two and Three) was used to make
observations taken in parallel with the prime science observations.  This
proposal is PRE-the new FOM default.  The observations were executed as
scheduled, and no anomalies were noted.

   1.17 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.

   1.18 Completed Seven Sets of NIC/1/2/3 7899 (An IR Search For faint
Companions to Pleiades Very Low-Mass Stars and Brown Dwarfs)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of PIZ1, CFHT-PL-23, CFHT-PL-25, CFHT-PL-24, CFHT-PL-22,
CALAR3 and CFHT-PL-19.  This is part of a infrared campaign to search for
faint companions to Pleiades very low-mass stars and brown dwarfs.  The
Pleiades has been the best site for brown dwarf {BD} searches, with half of
the presently "confirmed" BDs being Pleiades members.  As documented in
HSTAR 6649 and in section 2.1, the acquisition for the second iteration of
this proposal failed and the take data flag remained down.  Then, during
the sixth iteration, the loss of lock described in HSTAR 6651 and 2.1
occurred, temporarily taking down the take data flag.  Otherwise, the
observations were executed as scheduled, and no further anomalies were
noted.

   1.19 Completed Seven Sets of WF/PC-2 8061 (POMS Test Proposal: WF-II
Backup Parallel Archive Proposal)

       This is a POMS test proposal designed to simulate scientific plans.
As documented in HSTAR 6649 and in section 2.1, the acquisition for the
first iteration of this proposal failed and the take data flag remained
down.  Otherwise, the proposal was executed as planned, and no further
anomalies were reported.

   1.20 Completed Three Sets of NIC/2 6767 (A Search for Brown Dwarfs and
Luminous Young Planets in the Hyades)

       The Near Infrared Camera (Camera Two) was used to make observations
of the brown dwarf stars RHY297, RHY098 and RHY254 which are located in the
Hyades Cluster.  This is to search for substellar companions orbiting
low-mass Hyades M class dwarf stars.  Differential imaging was used using
methane and water band (on/off) filter pairs.  The observations were
completed as planned, and no problems were reported.

   1.21 Completed NIC/2 7897 (Probing Planetary Formation Around
Main-Sequence Stars: A Snapshot Survey)

       The Near Infrared Camera (Camera Two) was used to make snapshort
survey images of the main sequence stars HD53143 and HR8984 probing for
planetary formation.  The IR excess main-sequence stars host cool
circumstellar dust disks, which are most likely replenished by the debris
of unseen planetesimals.  The observations were completed as scheduled, and
no problems were noted.

   1.22 Completed NIC/12/3 7225 (Proper Motion of Stars Near SGR-A*)

       The Near Infrared Camera (Camera One, Two and Three) was used to
make astrometric proper motion observations of stars in the vicinity of
Sagittarius-A (a.k.a., NGC-4147).  Sgr-A may be a black hole with a mass
close to a million solar masses.  The observations were completed as
planned, and no anomalies were reported.

   1.23 Completed NIC/1/2/3 7888 (Young and Intermediate Aged Clusters in
M-33 as Stellar Laboratories)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the cluster NGC-598 which is located within the nearby
galaxy M-33.  This cluster will be used as a stellar laboratory to study
the bright asymptotic giant branch {AGB} stars expected in their fields.
The observations were executed as scheduled, and no anomalies were noted.

   1.24 Completed WF/PC-2 8059 (POMS Test Proposal: WF-2 Targeted Parallel
Archive Proposal)

       The WF/PC-2 was used to make observations in parallel with the prime
science observations.  The parallel opportunities available with WF/PC-2 in
the neighborhood of bright galaxies are treated in a slightly different way
from the normal pure parallels.  Local group galaxies offer the opportunity
for a closer look at young stellar populations.  The observations were
completed as planned, and no anomalies were reported.

   1.25 Completed FGS 7488 (A Search for Main-Belt Binary Asteroids)

       The Fine Guidance Sensors were used to make astrometric observations
of the main belt asteroid NYSA-FIX to search for a possible companion
moon/asteroid.  The targets was chosen on the basis of an extensive
analysis based mainly on peculiar photometric properties suggesting a
possible binary nature.  The observations were completed as planned, and no
problems were noted.

   1.26 Completed Two Sets of STIS/CCD/WF/PC-2/NIC/2 7388 (Black Holes and
the Centers of Galaxies)

       The Space Telescope Imaging Spectrograph (CCD), the WF/PC-2, and the
Near Infrared Camera (Camera Two) were used to continue our survey of
centers of the nearby galaxies NGC-821 and HR6770.  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.  During the first iteration of this proposal, as described in 2.1,
the acquisition failed to fine lock on one FGS only.  Otherwise, the
observations were completed as scheduled with no further anomalies.

   1.27 Completed WF/PC-2/NIC/1/2 7323 (The True Three-dimensional
Structure of the Eta-Carinea Nebula)

       The WF/PC-2 and the Near Infrared Camera (Cameras One and Two) were
used to trace independently the spatial distribution of the dust, of the
ionized gas and of the neutral material in the Eta-Carinae nebula.  The
observations were executed as scheduled, with no problems.

   1.28 Completed STIS/CCD/MA1 7556 (Dynamics And Energetics of Stellar Flares)

        The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make observations looking for stellar type flares on star HD197481 in order
to study their dynamics and energtics.  The Mode 1.3 echelle spectra was be
used to explore the dynamics and energetics of flares on this M class
dwarf.  The observations were executed as scheduled, and no anomalies were
reported.

   1.29 Completed Two Sets of NIC/2/3 7907 (NICMOS Pure Parallel Winter 97-98)

       The Near Infrared Camera (Cameras Two and Three) was used to make
pure parallel spectrographic observations of sky regions when another
instrument is prime.  The observations were completed as planned, and no
anomalies were reported.

   1.30 Completed NIC/2 7457 (Warm Molecular Hydrogen in Cluster Cooling
Flow Nebulae)

       The Near Infrared Camera (Camera Two) was used to make observations
of the emission-line nebula PKS0745-19 in order to study warm molecular
Hydrogen in a cluster cooling flow nebula.  The intracluster gas at the
centers of many clusters of galaxies can cool within a Hubble time,
prompting the suggestion that the ICM in these clusters cools and flows
towards the center, where it subsequently condenses.  The observations were
completed as planned, and no anomalies were reported.

   1.31 Completed NIC/1/2/3 7690 (NICMOS Pointed Super Flats)

       The Near Infrared Camera (Cameras One and Two) was used to make
super flat field calibration observations.  The observations will be used
to build high signal/noise ratio NICMOS flat fields for the different
filters.  The observations were executed as scheduled, and no anomalies
were noted.

    1.32 Completed NIC/1/2 7902 (Photometric Monitoring, Photometric
Monitoring-II)

       The Near Infrared Camera (Cameras One and Two ) was used to make
observations of absolute standard, solar analog star P177D-Cal as part of a
photometric monitoring program.  Observations were made at several
different wavelengths spanning the NICMOS wavelength range in each camera
NIC/1, NIC/2, and NIC/3 to monitor the photometric stability of the NICMOS
cameras as a function of wavelength.  The observations were executed as
scheduled, and no anomalies were noted.

   1.33 Completed STIS/CCD 7948 (CCD Dark and Bias Monitor -- Cont. to Dec. 98)

       The Space Telescope Imaging Spectrograph (CCD) was used to measure
CCD dark current and bias rates for the two supported amplifier settings
{GAIN=1 and GAIN=4} in order to gather data for making superdarks and
superbiases.  The data will be used to track the growth of hot pixels on
the CCD in general and within the various target acquisition apertures
specifically.  During the sixth iteration of this proposal, the loss of
lock described in HSTAR 6651 and 2.1 occurred, temporarily taking down the
take data flag.  Otherwise, the observations were executed as scheduled,
and no further anomalies were noted.

   1.34 Completed three Sets of WF/PC-2 7620 (WF/PC-2 Cycle 7 Standard Darks)

       The WF/PC-2 was used to make a series of Cycle 7 standard dark
calibration images.  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.

   1.35 Completed NIC/1/2/3 7827 (The Structure of Circumbinary Material in
Multiple T-Tauri Systems)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the T-Tauri class system IS-Tau to study the structure
of its circumbinary material.  Recent studies of T-Tauri populations in
nearby star forming clouds have shown that the majority of stars exist in
multiple {binary or higher} systems.  The observations were completed as
planned, and no problems were reported.

   1.36 Completed STIS/MA1 7950 (Cycle 7 MAMA Dark Measurements)

       The Space Telescope Imaging Spectrograph (MA1) was used to make a
dark calibration image. This is to establish if the detectors are
performing nominally, that no internal movement of the MCP has taken place,
and establish dark level in orbit for a given operating temperature.  These
darks will be used in later image reduction and also trended over
instrument life time as indicators of detector degradation or damage.  The
observations were completed as planned, and no problems were reported.

   1.37 Completed NIC/1/2/3 7829 (Mapping H_2 Emission around T Tauri Stars)

       The Near Infrared Camera (Cameras One, Two, and Three) was used to
study the distribution of circumstellar dust and molecular {H-2} gas around
the classical T Tauri stars {cTTS} star DR-Tau, probing both the near
circumstellar environment {the accretion disk} as well as the environment
further out where strong winds from these stars may be interacting with
remnants of the cloud material from which they formed.  The primary goal is
to map the distribution of the molecular gas around cTTS.  The proposal
completed nominally.

   1.38 Completed NIC/1/2/3 7855 (The Evolution of Powerful Radio Galaxies)

       The Near Infrared Camera (Camera One) was used to make observations
of the powerful radio galaxy OG003.  Our proposed NICMOS observations
combined with our multi-wavelength observing program will finally provide
us with the data we need to build a picture of how powerful radio galaxies
evolve.  The observations were completed as planned, and no problems were
reported.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 37
                                        Successful : 38

       HSTAR 6649 documents a guide star acquisition failure that occurred
at 247/2200Z when the  search radius limit was exceeded on FGS-3.  Vehicle
attitude errors were small before and after the failed acquisition.  The
proposals described in 1.1, 1.2, 1.4, 1.6, 1.18, and 1.19 were affected.

       As explained in HSTAR 6653, the acquisition at 249/065325Z defaulted
to fine lock backup on FGS-1 only when the scan step limit for FGS-3 was
exceeded.  The proposal described in 1.26 may have been affected.

                          Scheduled Reacquisitions : 23
                                        Successful : 23

       A loss of lock occurred at 249/012729 during a re-acquisition
period, resulting in a new #44 command.  HSTAR 6651 was written.  The
proposals described in 1.1, 1.18, and 1.33 were affected.


   2.2 FHST Updates:

                              Scheduled : 61
                             Successful : 61

   2.3 Operations Notes:

       Using ROP SR-1, the SSR EDAC error counter was cleared thirteen times.

       SSA transmitter #1 was turned on for a science dump at 248/1605Z per
ROP IC-2.

       The NSSC-1 flight software ED report was reset at 249/1908Z using
ROP SR-1.

       At 249/174000Z and at 249/200100Z, the NICMOS dewar temperature for
sensors 1-4 flagged out of limit high, with a value of 60.5 degrees K for
one sample.  There was no impact to science operations.  HSTAR 6654 was
written.

       As described in HSTAR 6655, FGSSCEA remained out of limits during
the acquisition (that occurred at 251/070842Z) beyond the period when it
normally returns to nominal ranges.  The parameter returned within limits
at the time of the next terminate exp.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       The battery #6 capacity check will begin this morning.

       Continuation of normal science observations and calibrations.

/DMH