HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2436

PERIOD COVERED:  0000Z (UTC) 08/13/99 - 0000Z (UTC) 08/16/99

Daily Status Report as of 228/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Four 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 Three 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.  

   1.3 Completed Eleven 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 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.  

   1.4 Completed Four 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 KK061, KK28, KK085 and NGC-1560.  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  

   1.5 Completed Five Sets of STIS/CCD 8202 (Bright Quasar Close Lensing
Search)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of HCLQ0443-4, HCLQ2247-6, HCLQ2358-5, HCLQ0008-4 and HCLQ2342-5
as part of a second generation survey to search for bright lensing quasars. 
With the restored PSF, new images will be considerably more sensitive to the
presence of both close separation and faint lens components, and because STIS
reaches two magnitudes fainter the PC, the new snapshot images will have much
greater dynamic range.  During the second and fifth iterations of this
proposal, the guide star acquisition failures described in 2.1 and HSTARs 7215
and 7216 occurred.  In each of these cases, the take data flag remained down
for two observations.  Otherwise, the observations were executed as scheduled,
and no further anomalies were noted.  

   1.6 Completed STIS/CCD/MA2 8257 (VV Cephei: The Egress from Chromospheric
Eclipse)

       The Space Telescope Imaging Spectrograph was used to make choromospheric
observations of the egress from eclipse of star VV Cephei (a.k.a., HD203338). 
This is to make observations of the long-period {20.3 yrs} eclipsing binary VV
Cephei {M2 Iab + B0} as it continues to emerge from chromospheric eclipse.  A
wavelength calibration image was also taken.  The observations were executed as
scheduled, and no anomalies were noted.  

   1.7 Completed Seven 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.  

   1.8 Completed WF/PC-2 8436 (POMS Test Proposal: WFII Backup Parallel Archive
Proposal II)

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

   1.9 Completed STIS/CCD 8470 (POMS Test Proposal: STIS Non-Scripted Parallel
Proposal Continuation V)

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

   1.10 Completed Two Sets of STIS/CCD/MA2 8225 (Absorption and Obscuration in
Radio-Loud Quasars)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to make
observations of the radio-loud galaxies MRC1217-20 and MRC0437-24.  The role of
associated absorption systems and dust obscuration close to the central engines
of AGN is not understood.  A wave length calibration image was also taken.  The
observations were completed as planned, and no anomalies were reported.   

   1.11 Completed STIS/CCD/MA1 8171 (HST Far-UV Imaging and Spectra of
Jupiter's Aurora During the Galileo Extended Mission)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to make
far-ultraviolet spectrographic observations of the aurora on the planet Jupiter
as part of the extended Galileo Mission.  This is to study the nature of the
satellite auroral footprints in Jupiter's atmosphere.  The observations were
completed as planned, and no problems were reported.  

   1.12 Completed WF/PC02 8167 (WF/PC-2 Imaging of a Galaxy at z = 5.34 and its
Field)

       The WF/PC-2 was used to make observations of the galaxy 0140+326D which
is at a distance of Z = 5.34.  This galaxy was the first spectroscopically
confirmed object at Z > 5 and among the few confirmed objects at z > 5
currently.  The observations were completed as planned, and no anomalies were
reported.  

   1.13 Completed WF/PC-2 8199 (Local Cosmology: The Nearby Flow Field and its
Structure)

       The WF/PC-2 was used to make observations of the galaxy IRAS3419 in
order to study its nearby flow field and structure.  Very little data are
available to constrain the velocity field of galaxies in the local neighborhood
{<= 500 km/sec}.  The observations were executed as scheduled, and no anomalies
were noted.  

   1.14 Completed FOC/96 7923 (FOC F/96 Turn-on)

       The Faint Object Camera (f/96) was used to take an internal flat and a
dark to ensure that the 30-day limit for the FOC is not exceeded.  The
observations were executed as scheduled, and no anomalies were noted.  

   1.15 Completed S/C 5582 (FOC/48 Monthly Activation (Camera Section Only):
Cycle 4) 

        This proposal was executed as scheduled, and no anomalies were noted. 

   1.16 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.  

   1.17 Completed Two Sets of STIS/MA1 7769 (Spectro Imaging of the Jovian
Aurora)

       The Space Telescope Imaging Spectrograph (MA1) was used to make
spectrographic images of the aurora of the planet Jupiter.  Observations were
also made of its moon Io.  The primary interest is the diagnostic of the
Lyman-Alpha emission in several particular regions of the Jovian auroral
region, together with records of the H-2 Lyman and Werner emission which is
necessary for its interpretation.  The observations were completed as planned
and no anomalies were noted.  

   1.18 Completed WF/PC-2 6488 (An Ultra-Faint Galaxy Count and Redshift Survey
Using Cluster Lenses)

       The WF/PC-2 was used to make observations of distant ultra-faint
galaxies using the foreground galactic cluster Abell-2219 as a gravitational
lens cluster.  The abundance, clustering and other properties of such sources
would be valuable constraints on theories of structure formation.  The
observations were executed as scheduled, and no anomalies were noted.  

   1.19 Completed STIS/CCD 8313 (Imaging the Host Galaxies of High Redshift
Type Ia Supernovae)

        The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of 97241 and its host galaxy.  The propose is to obtain snapshot,
unfiltered STIS images of distant galaxies of known redshift which have hosted
supernovae {SNe} of Type IA found via the Supernova Cosmology Project.  The
observations were completed as scheduled, and no anomalies were reported.  

   1.20 Completed WF/PC-02 8131 (HST Imaging of Moderate Redshift X-ray
Emitting Groups of Galaxies)

       The WF/PC-2 was used to make observations of the infrared and x-ray
emitting galactic cluster Gal-Clus-0723.  Most galaxies in the universe,
including our own Milky Way, are members of poor groups of galaxies.  Recent
optical and X- ray observations of nearby groups have revealed considerable new
insight into these important systems.  The observations were completed as
scheduled, and no problems were reported.  

   1.21 Completed WF/PC-2 8395 (Sakurai’s Nova-like Object: Real-Time
Monitoring of a Stellar Thermal Pulse-Continued)

       The WF/PC-2 was used to make observations of the Sakurai Nova-like
object.  The eruption of Sakurai's nova-like variable in Sagittarius presents a
"once-in-a-lifetime" opportunity for real-time observations of a star
undergoing a final helium thermal pulse.  The observations were completed as
planned, and no anomalies were noted.  

   1.22 Completed STIS/CCD 8271 (A Snapshot Survey of LMC Planetary Nebulae: A
Study of Nebular and Late Stellar Evolution)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
medium-resolution slitless spectroscopy snapshot images of the planetary
nebulae LMC-SMP-13 located in the Large Magellanic Cloud to study the parallel
evolution of the nebulae and their central stars.  The observations were
completed as planned, and no problems were reported.  

   1.23 Completed STIS/CCD/MA1 8188 (Snapshot Spectroscopic Diagnostic Survey
of the Symbiotic Stars)

       The Space Telescope imaging Spectrograph (CCD, MA2 and MA1) was used to
make ultraviolet observations of star RX-Pup as part of a snapshot
spectroscopic diagnostic survey of symbiotic stars.  Using these data we will
be able to establish meaningful statistical limits on the nature of hot
component sources of ionization and fundamental wind parameters, which are
vital steps toward understanding the accretion hydrodynamics and the
evolutionary status of symbiotic systems.  A wavelength calibration image was
also taken.  The observations were executed as scheduled, and no anomalies were
noted.  

   1.24 Completed 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.  

   1.25 Completed WF/PC-2 8274 (A Size Survey of Cometary Nuclei)

       The WF/PC-2 was used to make observations of the comet Ciffreo as part
of a size survey of cometary nuclei.  This is part of a program to determine
the basic physical properties of a large fraction of the population of
short-period comets.  The observations were completed as planned, and no
anomalies were reported.  

   1.26 Completed STIS/CCD/MA1 8287 (A Search For Transparent Lines of Sight
With Intergalactic He-II Absorption Towards 26 Bright z > 2.9 Quasars)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to make
He-II absorption line observations of quasar HE0106-221.  The aim is to
identify more suitable bright objects for detailed studies of intergalactic
He-II absorption at a redshift of Z <2.9 and >3.2 .  A wavelength calibration
observation was also taken.  The observations were executed as scheduled, and
no anomalies were noted.  

   1.27 Completed FGS 8319 (Masses and Distances of Pre-Main Sequence Binaries)

       The Fine Guidance Sensors were used to make astrometric observations of
the pre-main sequence binary star system ZZ-Tau.  Observations were also made
of several reference stars.  Our goal is to measure the masses of low mass
young stars.  This will enable a calibration of theoretical calculations of
stellar evolution to the main sequence.  The observations were completed as
planned and no problems were reported.  

   1.28 Completed WF/PC-2 8453 (Cycle 8 Polarization)

       The WF/PC-2 was used to make observations of the standard source star
BD+64D106 in order to verify the stability of the instrument’s polarization
calibration.  The observations were completed as planned, and no problems were
reported.  

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions: 33
                                        Successful: 31

       As documented in HSTARs 7215 and 7216, the acquisitions scheduled for
226/0744654Z and 227/044256Z failed to RGA control when the scan step limit was
exceeded.  The proposal detailed in 1.5 was affected in each case.

                         Scheduled Re-acquisitions: 17
                                        Successful: 17

   2.2 FHST Updates: 

                              Scheduled: 77
                             Successful: 77

   2.3 Operations Notes: 

       Real-time operations transferred to the PRS system at 225/1538Z.

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

       A full DF-224 dump was commanded at 225/1538Z.  The ground master image
was updated at 225/0115Z.

       The SSA transmitter was manually turned on at 227/0027Z and off at
227/0056Z as directed by ROP IC-2.

       ESTR-2 was re-conditioned at 229/0427Z per ROP RD-7; ESTR-3, at
228/0810Z.

       The NICMOS FPA temperature sensor for detector 2 was enabled at
228/0632Z.

       The NSSC-1 status buffer was dumped at 228/0903Z per ROP NS-3.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

       Continuation of normal science observations and calibrations.

/DMH