HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1913

PERIOD COVERED:  0000Z (UTC) 07/03/97 - 0000Z (UTC) 07/07/97

Daily Status Report as of 188/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Four Sets of STIS/CCD 7659 (Daily Darks to Update
Acquisition Bad Pixel Table)

       The Space Telescope Imaging Spectrograph (CCD) was used to make dark
calibration images in order to update the acquisition bad pixel table.
Daily hot pixel lists can also be used for science data analysis.  The
observations were executed as scheduled, and no anomalies were noted.

   1.2 Completed Three Sets of NIC/2 7325 (The Small Scale Structure of
Protostellar Disks and Infall Envelopes)

        The Near Infrared Camera (Camera Two) was used to make images of
the protostellar systems STARW-16270, IRAS16244 and STAR-16262 in order to
study the small scale structure of the disks and infall envelopes.  HST has
provided striking images of circumstellar disks towards young stars, as
seen silhouetted in absorption against bright nebular backgrounds.  The
advent of the near-infrared NICMOS camera on HST brings subarcsecond
imaging to even younger sources, protostars. Mid-way through the first
iteration of this proposal, at 184/014003Z, at the end of a T3 slew, there
was a loss of lock which issued new #44 commands.  HSTAR 6112 was written.
Any effects on science are not currently known.  Otherwise, the
observations were executed as scheduled, and no anomalies were noted.

   1.3 Completed Twelve Sets of WF/PC-2 6253 (Pure Parallel Archive Program)

       The WF/PC-2 was used to execute a pure parallel program taking
ultraviolet observations running concurrently with prime science
observations.  The intent is to search for extra-galactic sources with flux
excesses at 3000 A0 and galactic sources with excesses at 1600 A0.   Just
before the first iteration of this proposal, at 184/014003Z, at the end of
a T3 slew, there was a loss of lock which issued new #44 commands.  HSTAR
6112 was written.  Any effects on science are not currently known.
Otherwise, the observations were completed as planned, and no problems were
reported.

   1.4 Completed Nine Sets of WF/PC-2 6194 (WF/PC-2 Cycle 5: Polarization
Proposal)

       The WF/PC-2 was used to make polarization observations of star
BD+64D106 at four different spacecraft roll angles.  This should permit a
detailed and independent calibration of each polarizer quad.  The
observations were executed as scheduled, and no anomalies were noted.

   1.5 Completed Five Sets of WF/PC-2 7450 (The Formation of Bulges of
Spiral Galaxies: Central Visual-Infrared Color Gradients)

       The WF/PC-2 was used to make observations of the bulge in spiral
galaxies NGC-5577, NGC-7537, NGC-5746 and NGC-5707in order to obtain
high-resolution optical and near infrared images for a complete survey
sample of bulges of spiral galaxies.  The observations were completed as
scheduled, and no anomalies were reported.

   1.6 Completed Sixteen Sets of STIS/CCD 7727 (STIS Non-Scripted Parallel
Archive Proposal)

       The Space Telescope Imaging Spectrograph (CCD) was used to obtain
parallel slitless spectroscopy with the G750L grating to search for
emission line galaxies at intermediate to high redshift.  Field galaxy
surveys have shown that at
high redshift most galaxies have strong emission lines, and are compact and
blue.  During one of the iterations of this proposal, at 186/125201Z, there
was a guide star acquisition failure that affected two observations.  HSTAR
6114 was written.  Otherwise, the observations were completed as planned,
and no further anomalies were reported.

   1.7 Completed Five Sets STIS/MA2 7604 (Cycle 7 MAMA Dark Measurements)

       The Space Telescope Imaging Spectrograph (MA2) was used to make MAMA
dark measurements.  These darks will be used in later image reductions and
also trended over the instrument's life time as an indicator of the
detector's degradation or damage.  The observations were completed as
scheduled, and no problems were reported.

   1.8 Completed Two Sets of WF/PC-2/STIS/MA1 7308 (HST FAR-UV Imaging and
Spectra of Jupiter's Aurora Coordinated With Galileo)

       The WF/PC-2 and the Space Telescope Imaging Spectrograph (MA1) were
used to make far-ultraviolet imaging and spectral observations of the
aurora near both poles of the planet Jupiter at the same time as scheduled
GALILEO spacecraft measurements of Jupiter's magnetospheric properties and
ultraviolet emissions over the summer and fall of 1997.  The observations
were completed as planned, and no anomalies were reported.

   1.9 Completed Three Sets of WF/PC-2 6753 (Recovery of Inner Satellites
of Neptune)

       The WF/PC-2 was used to make observations of the planet Neptune in
order to try to re-discover its inner moons.  Six small inner satellites of
Neptune were discovered by Voyager 2 spacecraft in 1989, and none of them
have been observed since.  The observations were completed as scheduled,
and no problems were reported.

   1.10 Completed STIS/MA2 7604 (Cycle 7 MAMA Dark Measurements)

       The Space Telescope Imaging Spectrograph (MA2) was used to make MAMA
dark measurements.  These darks will be used in later image reductions and
also trended over the instrument's life time as an indicator of the
detector's degradation or damage.  The observations were completed as
scheduled, and no problems were reported.

   1.11 Completed Four Sets of NIC/2 7327 (Elliptical Galaxy Evolution at
High Redshift: IR Imaging of 60 Distant Clusters)

       The Near Infrared Camera (Camera Two) was used to make infrared
observations high redshifted elliptical galaxies in galactic clusters
CL1038+464, MS1621.5+2, MS1333.3+1 and MS0302.1+1.  By measuring the
structural properties of high redshift cluster elliptical galaxies, it is
hoped to resolve the controversy regarding the age and formation history of
bright cluster ellipticals.  The observations were executed as scheduled,
and no anomalies were noted.

   1.12 Completed Two sets of NIC/1 7232 (NICMOS Spectrophotometry and High
Resolution Imaging of HD 98800)

       The Near Infrared Camera (Camera One) was used to make
spectrophotometry and high resolution imaging of star HD 98800.  This star
system is located nearby at a probable distance of 20 pcs.  It is a unique
stellar system consisting of two K7-V stars separated by 0.8 arcsec. A dark
calibration image was also taken.  The observations were executed as
planned, and no problems were encountered.

   1.13 Completed WF/PC-2 5828 (HST FAR-UV Imaging and Spectra of Jupiter -
Coordinated with the Galileo UVS)

       The WF/PC-2 was used to make far-ultraviolet imaging and
spectrographic observations of the planet Jupiter's north auroral
emissions.  These observations will be coordinated with the Galileo Mission
ultraviolet observations.  The observations were executed as scheduled, and
no anomalies were noted.

   1.14 Completed WF/PC-2 6602 (B2114+022: A Gravitational Lens System
and/or an Example of Multiple Active Nuclei?)

       The WF/PC-2 was used to make observations of QSO-211650 (a.k.a., the
radio source B2114+022).  The prime objective of the observations is to
finding out whether or not the unique configuration of radio images is a
result of gravitational lensing.  The observations were executed as
scheduled, and no anomalies were reported.

   1.15 Completed Eight Sets of STIS/CCD 7675 (STIS Non-Scripted Parallel
Archive Proposal)

       The Space Telescope Imaging Spectrograph (CCD) was used in the
parallel mode to obtain slitless spectroscopy with the G750L grating to
search for emission line galaxies at intermediate to high redshift.  The
observations were completed as planned, and no anomalies were reported.

   1.16 Completed Eighteen Sets of NIC/1/2/3 7729 (NICMOS Short One Orbit
Parallel)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
obtain "JHK" imaging of sky regions while another instrument was prime.
These observations were  part of the short NICMOS one orbit parallel
program.  The observations were executed as scheduled, and no anomalies
were noted.

   1.17 Completed Two Sets of WF/PC-2 6862 (Starburst Luminous Blue Galaxies)

       The WF/PC-2 was used to study the starbursting regions in luminous
blue galaxy NGC-2415.  This class of  galaxies is common at moderate
redshifts but relatively rare nearby.  The observations were executed as
scheduled, and no anomalies were noted.

   1.18 Completed FGS 6880 (Parallax Of RW Tri)

       The FGSs were used to make astrometric observations of the variable
star RW-Tri.  RW-Tri is an old nova for which a precise parallax would
increase the validity of any astrophysical investigations.  The
observations were completed as planned, and no problems were reported.

   1.19 Completed Three Sets of NIC/1/2/3 7726 (NICMOS One Orbit Parallel)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make a one orbit parallel calibration observations.  During the final
iteration of this proposal, as documented in HSTAR 6114, the guide star
acquisition failed at 186/125201Z failed.  Two observations were affected.
Otherwise, the observations were executed as scheduled, and no further
anomalies were noted.

   1.20 Completed WF/PC-2 7497 (WF/PC-2 Observations of Astrophysically
Important Visual Binaries)

       The WF/PC-2 was used to make observations of the visual binary
variable sat system MU Cas.  This system is a famous metal-deficient G
dwarf for which accurate masses will lead to the star's helium content with
cosmological implications.  The observations were completed as planned, and
no anomalies were reported.

   1.21 Completed Three Sets of WF/PC-2 6776 (A Comparative HST Imaging
Study of Radio Galaxies and Hosts)

       A clear understanding of the nature of the host galaxies of
radio-quiet quasars, radio-loud quasars and radio galaxies is of central
importance in any attempt to unify and relate the three main classes of
powerful active galaxies.  Existing HST studies of quasar hosts, whilst
producing many interesting new results, have yielded surprisingly little
hard information on the properties of the hosts themselves.  This imaging
study of objects PKS2349-01, PHL1093 and US3498 using the WF/PC-2 will
remedy this situation by undertaking redder, line-free observations of our
three matched AGN samples.  The proposal completed with no reported
problems.

   1.22 Completed WF/PC-2 6836 (Light Curve of an Eclipsing Millisecond Pulsar)

       The WF/PC-2 was used to make observations of the eclipsing
millisecond pulsar PSRJ2051-0 in order to obtain its light curve.  This
pulsar is an exciting new millisecond pulsar which is in a 2.38 hour
circular orbit about a 0.03 solar mass companion which eclipses the pulsed
radiation from the pulsar for 20 minutes each orbit.  The companion is only
the second eclipsing millisecond pulsar companion identified optically.
The observations were executed as scheduled, and no anomalies were noted.

   1.23 Completed WF/PC-2 6587 (Black Holes and Cores of Early-Type Galaxies)

       The WF/PC-2 was used to make observations of early-type galaxy
ESO462-015 in order to study its nuclear core region and its possible black
hole.  The campaign to find black holes in the centers of galaxies using
HST has so far been highly successful.  The observations were completed as
planned, and no problems were reported.

   1.24 Completed Four Sets of STIS/MA1 7078 (STIS18M Spectroscopic Mode
Image Quality - MAMA)

       The Space Telescope Imaging Spectrograph (MA1) was used to  examine
the spectroscopic quality across the entire detector for the primary
spectroscopic modes and establish whether changes occurred during launch.
The observations were completed as scheduled, and no anomalies were
reported.

   1.25 Completed WF/PC-2 5923 (The Structure of the Emission Line Regions
of Compact Steep Spectrum)

       The WF/PC-2 was used to make observations of the compact radio
galaxy 3C277.1 in order to study the structure of the emission line regions
of its compact steep spectrum.  The goal is to map the emission line
structure and establish its relationship to the radio structure.  The
observations were completed as scheduled, and no anomalies were reported.

   1.26 Completed Four Sets of NIC/2 7330 (The Fueling of Active Nucleii: A
NICMOS Snapshot Survey)

       The Near Infrared Camera (Camera Two) was used to probe the dark
matter distribution of NGC-3458, NGC-3718, NGC-864 and NGC-3516 far from
the center by observing intervening absorption from the MgII doublet
(lambda 2800) in the spectrum of one background QSO located in a
geometrically optimal position.  HST observations are required because this
feature is in a wavelength range not accessible from the ground, and the
QSO magnitudes and expected strength of absorption make IUE observations
unfeasible.  The proposal completed as expected with no anomalies.

   1.27 Completed WF/PC-2 6855 (The Disks Around Young Stellar Objects)

       The WF/PC-2 was used to make observations of the disk surrounding
the young stellar object SZ-102.  Circumstellar material has been detected
at 1.3 mm around about 50% of the young (T<10^6 yr) stellar objects in the
Taurus-Auriga molecular cloud.  The observations permit an estimate of the
material's spatial extent, mass and temperature.  The observations were
executed as scheduled, and no anomalies were noted.

   1.28 Completed WF/PC-2 6194 (WF/PC-2 Cycle 5: Polarization Proposal)

       The WF/PC-2 was used to make polarization observations of star
BD+64D106 at four different spacecraft roll angles.  This should permit a
detailed and independent calibration of each polarizer quad.  The
observations were executed as scheduled, and no anomalies were noted.

   1.29 Completed Three Sets of WF/PC-2 5831 (Temporal Evolution of
Neptune's Vertical Aerosol Structure)

       The WF/PC-2 was used to make observations of the planet Neptune at
various different wavelengths to study the temporal evolution of its
vertical structure in its atmosphere.  The observations were executed as
scheduled, and no anomalies were noted.

   1.30 Completed STIS/MA1/MA2 7064 (STIS SMOV MAMA Contamination Monitor)

       The Space Telescope Imaging Spectrograph (MA1/MA2) was used to make
observations of the flux from standard star GRW+70D582 in order to monitor
for any gross changes over time that might indicate contamination.  The
observations were completed as planned, and no anomalies were reported.

   1.31 Completed WF/PC-2 6677 (The Origin of the X-Ray Background: What
are the Faintest X-Ray Galaxies?)

       The WF/PC-2 was used to make observations of the galaxy GAL-133354
which is from the deepest optically identified (ROSAT) X-ray survey yet.
These images were taken to determine the morphologies of the remaining
systems, which we cannot study from the ground, to determine whether the
remaining non-QSO XRB might be explained by emission from interacting or
disturbed spirals.  The observations were completed as planned, and no
anomalies were reported.

   1.32 Completed WF/PC-2 6720 (The Evolution of Radio Loud Quasars II)

       The WF/PC-2 was used to make observations of the radio loud quasar
MRC2156-24 as part of a mini-survey to study its evolution and morphology.
As documented in HSTAR 6114, the guide star acquisition at 186/125201Z
failed and the re-acquisiton at 186/142330Z also failed even after the
uplink of a new ARU/PRT.  Four observations were affected.  No furtehr
anomalies were noted.

   1.33 Completed WF/PC-2 6774 (Temporal Variability in Io's Surface and
Plumes)

       The WF/PC-2 was used to make observations of Jupiter's moon Io at
Longitude 370 degrees in order to study temporal variability in its plums
and surface markings.  The longitude was chosen such that a known volcano
will be present at Io's limb.  The observations were executed as scheduled,
and no anomalies were noted.

   1.34 Completed Two Sets of NIC/2 7331 (Near-IR Properties of the Bulges
of Spiral Galaxies)

       The Near Infrared Camera (Camera Two) was used to make infrared
observations of the bulges in spiral galaxies NGC-6000 and NGC-1398.
Near-IR data at HST resolution are essential for correcting for the effect
of dust and will enable us to derive robust nuclear properties for the
sample.  The observations were executed as scheduled, and no anomalies were
noted.

   1.35 Completed STIS/DUM/MA1/MA2 7080 (STIS19M - Camera Mode Image
Quality - MAMA)

       The Space Telescope Imaging Spectrograph (DUM/MA1/MA2) was used to
make observations of NGC-6681 in order to determine the camera mode's image
quality, and to determine the form of the instrumental Point Spread
Function (PSF) for the MAMA detectors as a function of wavelength and
position.  The observations were completed as scheduled, and no anomalies
were reported.

   1.36 Completed STIS/CCD 7123 (MAMA and CCD Spectroscopy of SN1987A)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the super-nova remnant LMC-SN1987 which is located in the
Large Magellanic Cloud.  This is to study SN-1987A and its nebula by taking
spectra at both ultraviolet and optical wavelengths to obtain a spatially
resolved map of the debris and the circumstellar rings.  A waveline
calibration image was also taken.  The observations were completed as
planned, and no anomalies were reported.

   1.37 Completed FOC/96 6570 (High-Redshift Galaxies and Their
Contribution to the Ionizing Background)

       The Faint Object Camera (f/96) was used to make ultraviolet
objective-prism spectroscopy observations of the high-redshifted galaxy
GAL-CFRS-2 in order to study its contribution to the ionization background,
and to study its ultraviolet spectral energy distribution from shortward of
the Lyman limit to longward of Lyman-Alpha.  The observations were executed
as scheduled, and no anomalies were noted.

   1.38 Completed FOC/96 6426 (A Search for Multiple Images of QSOs Seen
Through Damped Ly-Alpha Absorbers)

       The Faint Object Camera (f/96) was used to make observations of QSO
2223-052.  The propose of these observations is to obtain high-resolution
images of a sample of QSOs with strong damped Lyman-Alpha absorption in
their spectra.  The observations should determine whether these QSOs are
multiply imaged by gravitational lensing.  The observations were completed
as planned, and no problems were reported.




2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 53
                                        Successful : 52
                          Scheduled Reacquisitions : 17
                                        Successful : 16

       There was a guide star acquisition failure at 186/125201Z, and a
re-acquisition failure at 186/142330Z.  The affects on science are related
in 1.6, 1.19, and 1.32.

   2.2 FHST Updates:

                              Scheduled : 64
                             Successful : 64

   2.3 Operations Notes:

       The long holiday weekend period was conducted with few operational
problems.

       SSR Interrupt Logs were dumped at 185/0447Z, 186/0102Z, 187/0352Z,
and 188/0317Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science and SMOV operations.

/DMH