HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1669

PERIOD COVERED:  0000Z (UTC) 07/03/96 - 0000Z (UTC) 07/08/96

Daily Status Report as of 190/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed GHRS/1/2 6594 (White Dwarf Companions of Barium and CH =
Peculiar Stars)

       The High Resolution Spectrograph (Sides One and Two) were used in =
an attempt to make spectrographic observations of the white dwarfs of the =
Barium and CH Peculiar class stars HD1167713 and HD89948-B.  This will =
test the theory that abundance anomalies in these stars caused by mass =
transfer from the precursor of their white dwarfs.  The observations were =
executed as scheduled, and no anomalies were noted.

   1.2 Completed Four Sets of WF/PC-2 6193 (PSF Characterization)

       The WF/PC-2 was used to make several observational images  of the =
large globular cluster Omega Cen using the main photometric filters.  =
During these exposures the spacecraft executed a 4X4 dwell scan so that =
the images of the object fell at 16 different locations on the CCDs.  =
This is to sample the point spread function (PSF).  The observations were =
completed as planned, and no problems were reported.

   1.3 Completed WF/PC-2 6358 (UV Imaging of Circumnuclear Starburst =
Rings)

       The WF/PC-2 was used to make ultraviolet snapshot observations of =
galaxy NGC-5248 in order to study its circumnuclear starburst rings.  A =
homogeneous database of properties of the star-forming region will be =
generated.  The observations were executed as scheduled, and no anomalies =
were noted.

   1.4 Completed WF/PC-2 6431 (Determination of the Extragalactric =
Distance Scale)

       The WF/PC-2 was used to make observations of the galaxy NGC-4535 =
to be used in measuring the periods of Cepheid variable stars within this =
galaxy.  This will allow for a more accurate estimate of the distances to =
these galaxies through the period-luminosity relation for the Cepheid =
stars.  The observations were executed as scheduled, and no anomalies =
were noted.

   1.5 Completed GHRS/1 6886 (GHRS Observations of Eta UMa)

       The High Resolution Spectrograph (Side One) was used to make =
spectrographic observations of absorption features from the warm, =
interstellar cloud surrounding the solar system in the spectrum of the B3 =
V class star Eta UMa (aka, HD120315).  The abundances of C, N, O, Si, Zn, =
Fe, and Mg will be measured and the cloud's physical structure can be =
inferred.  Near the beginning of this 11 hour proposal, there was an GHRS =
Fine X-Null Balance failure.  HSTAR 5647 documented the event.  =
Otherwise, the observations were executed as scheduled, and no further =
anomalies were noted.

   1.6 Completed Two Sets of WF/PC-2 6187 (WF/PC-2 Cycle 5 Calibration: =
Earth Flat)

       The WF/PC-2 was used to make Earth streak flat calibration images. =
 These streak flats will be used to produce flat fields, to map the OTA =
illumination pattern and, in combination with other data, to produce new =
superflats.  The observations were completed as planned, and no problems =
were reported.

   1.7 Completed WF/PC-2 6361 (High Resolution Imaging of X-Ray Selected =
AGNs)

       The WF/PC-2 was used to make high resolution  observations of the =
known low red shifted x-ray active galactic nuclei (AGN) MS1351.6+4.  =
These data will allow a study of the optical properties of an unbiased =
sample of AGN host galaxies.  The observations were completed as =
scheduled, and no problems were reported.

   1.8 Complete WF/PC-2 5993 (Dark Matter Distribution in A1689 from =
gravitational lensing)

       The WF/PC-2 was used to make observations of galaxy cluster =
A1689-14 in order to study the distribution of dark matter in the lensing =
galaxy cluster system.  This is to carry out an extensive survey of the =
galaxies lying behind this cluster.  As described in Section 2.2 and =
HSTAR 5648, there was a loss of lock during this proposal with the take =
data flag going down.  Otherwise, the observations were completed as =
planned, and no  further problems were reported.

   1.9 Completed Two Sets of WF/PC-2 6365 (A Snapshot survey For =
Companions and Clusters around Wolf-Rayet Stars)

       The WF/PC-2 was used to make snapshot observations of Wolf-Rayet =
stars WR48 and WR48A in order to look for companion stars and clusters.  =
Photometry was performed on the Wolf-Rayet stars and associated stars.  =
The observations were completed as planned, and no anomalies were =
reported.

   1.10 Completed FOS/RD 6167 (FOS Cycle 5: Dark Monitoring)

       The Faint Object Spectrograph (Red Side) was used to make several =
dark calibration images.  All exposures were internals.  All spectra was =
done in the image mode.  The observations were completed as planned, and =
no problems were reported.

   1.11 Completed WF/PC-2 6348 (Blue Continuum Snapshots of 3CR Radio =
Galaxies)

       The WF/PC-2 was used to make some snapshot images of the blue =
continuum in radio galaxy 3C86.0.  Combined with existing data, these =
exposures will provide high spatial resolution information on the color =
distribution within galaxies, redding due to dust, spacial indices of the =
optical synchrotron jets, and colors of the active nuclei and tidal jets. =
 The observations were executed as scheduled, and no anomalies were =
noted.

   1.12 Completed FGS 6047 (Calibrating the Mass Luminosity Relation at =
the End of the Main Sequence)

       The FGSs were used to make astrometric observations of star GL22-2 =
as part of a study to determine its mass luminosity relationship.  The =
purpose is to measure the precise parallax and relative orbit of its =
faint companion.  The observations were completed as planned, and no =
problems were reported.

   1.13 Completed Seven 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.  =
The observations were completed as planned, and no problems were =
reported.

   1.14 Completed Two Sets of WF/PC-2 6752 (Global Mapping of the =
Opposition Surge on the Galilean Satellites)

       The WF/PC-2 was used to make observations of the planet Jupiter's =
moons Callisto, Europa, Io and Ganymede while Jupiter is in opposition.  =
The brightness at opposition (The opposition effect) is common to Solar =
System bodies without atmospheres.  Differences in surface roughness and =
structure affect the amount and phase-angle shape dependence in the =
brightening.  The observations were executed as scheduled and no =
anomalies were noted.

   1.15 Completed Three Sets of FOS/RD 6577 (An Expanded Survey for Study =
of the Lyman-Alpha Line and QSO Mg II Absorption)

       The Faint Object Spectrograph (Red Side) was used to make =
observations of the QSOs 1623.7+268, TON1530 and 4C18.43 in order to make =
a survey of their Lyman-Alpha line and the 68 Mg II absorption line =
systems.  The observations were completed as scheduled, and no problems =
were reported. 

   1.16 Completed GHRS/2 6748 (Abundances of Very Heavy Elements in the =
Early Galaxy III)

       The High Resolution Spectrograph (Side Two) was used to make =
observations of the very old, metal poor, halo star HD115444.  From these =
spectra, the abundances of irridium, lead, platinum, and osmium will be de=
termined.  These elements are synthesized in stellar interiors by either =
rapid or slow neutron capture processes.  The observations were completed =
as planned, ands no problems were reported.

   1.17 Completed FOS/BL and WF/PC-2 6042 ()

       The WF/PC-2 was used to make images and the Faint Object =
Spectrograph (Blue Side) made spectrographic observations of ejecta from =
Eta Carina.  This is to study the gas kinematics, physical conditions in =
the ejecta and abundances of elements in the gas.  The observations were =
executed as scheduled, and no anomalies were noted.

   1.18 Completed WF/PC-2 6363 (The Environments and Host Galaxies of =
BL-Lac Objects)

       The WF/PC-2 was used to make snapshot survey observations of =
BL-Lac object 1ES2321+41 in order to study its environment and its host =
galaxy.  The goal is to investigate systematic trends in host galaxy =
type, unusual morphological features, nearby companion galaxies, etc.  =
The observations were executed as scheduled, and no anomalies were noted.

   1.19 Completed FOS/RD 6585 (UV Spectra of Representative Stellar =
Populations of Age > 2)

       The Faint Object Spectrograph (Red Side) was used to make =
mid-ultraviolet spectrographic observations of the nuclear region of =
nearby galaxy NGC-3605.  This galaxy has a relatively old stellar =
population.  The objective is to fill in crucial gaps in our =
understanding of stellar populations, and thus aid in the modeling of =
galactic evolution.  The observations were completed as planned, and no =
anomalies were reported.

   1.20 Completed Three Sets of WF/PC-2 5971 (HST Medium Deep Survey)

       The WF/PC-2 was used to make long exposure medium deep sky survey =
observations at latitudes larger than 10 degrees taken in parallel with =
the prime science observations.  The observations were executed as =
scheduled, and no anomalies were noted.

   1.21 Completed 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 galaxy NGWULIR142.  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.

   1.22 Completed FOS/RD 6450 (Hydrogen and Metal Abundances in the Cool =
Helium Rich White Dwarf Ross 640)

       The Faint Object Spectrograph (Red Side) was used to make high =
signal to noise ratio spectrographic observations of the cool, helium =
rich, white dwarf Ross 640 (aka, WD1626+368) in order to study its =
hydrogen and metal abundances.  In cool, He-rich, white dwarfs, traces of =
metals are occasionally found.  The observations were completed as =
scheduled, and no anomalies were reported.

   1.23 Completed WF/PC-2 6352 (Dwarf Eliptical Galaxy Snapshots)

       The WF/PC-2 was used to survey VCC240, from a sample of 30 dwarf =
eliptical galaxies.  The observations were completed as planned, and no =
anomalies were reported.

   1.24 Completed FOS/BL 6705 (Below the Lyman Edge: VU Polarimetry of Qua=
sars)

       The Faint Object Spectrograph (Blue Side) was used to make =
spectrographic polarization observations below the Lyman edge of the =
bright quasar 1718+481.  The observations were completed as planned, and =
no problems were reported.

   1.25 Completed WF/PC-2 6250 (WF/PC-2 Cycle 5 Calibration: Internal =
Monitor)

       The WF/PC-2 was used to make a series on internal calibration =
observations.  Internal flats, biases, and K-Spot calibration images were =
taken.  These observations are designed to monitor the health of the =
cameras.  The observations were executed as scheduled, and no anomalies =
were noted.

   1.26 Completed WF/PC-2 6359 (Core Properties of the Bulges of Spiral =
Galaxies)

       The WF/PC-2 was used to make snapshot survey observations of =
spiral galaxy NGC-4384 in order to study its central bulge.  The aim is =
to investigate the core properties, correlation's with global galactic =
properties, and the frequency of occurrence of multiple and/or =
miscentered nuclei.  The observations were completed as scheduled, and no =
anomalies were noted.

   1.27 Completed GHRS/2 6041 (A multi-Faced Study of Eta Carnina)

       The High Resolution Spectrograph (Side Two) was used to make =
observations of Eta-Carnina to test many different theoretical points.  =
The observations were executed as scheduled, and no anomalies were noted.

   1.28 Completed GHRS/2 6500 (A New Abundance Reference at the Present =
Epoch)

       The High Resolution Spectrograph (Side Two) was used to make =
spectrographic observations to determine the strength of Fe absorption =
lines to be used to infer the presence or absence of dust in the high =
velocity cloud HVC287+22-240.  This is a candidate for a dust-free cloud =
in the direction of Seyfert galaxy NGC-3783.  The observations were execut=
ed as scheduled, and no anomalies were noted.

   1.29 Completed WF/PC-2 6439 (Using Cepheid Based Distance to Test =
Large Peculiar Motions)

       The WF/PC-2 was used to make observations of the spiral galaxy =
NGC-4603 which is located in the Centaurus galaxy cluster to look for =
Cepheid variable stars to be used to measure the distance to the object, =
which in turn will be used to study its large peculiar motions.  If this =
galaxy is a cluster member, as appears from secondary distance =
indicators, then its peculiar velocity is inconsistent with that =
predicted from the density field as reconstructed from the observational =
distribution of galaxies in the cluster.  The observations were executed =
as scheduled, and no anomalies were reported.

   1.30 Completed WF/PC-2 5840 (Imaging Polarimetry of the Eta and AG Car =
Nebulae)

       The WF/PC-2 was used to obtain polarimetric observations of the =
nebula surrounding the luminous blue star HD93308 (aka, Eta Car Nebula).  =
This nebula was formed during massive outbursts that rivaled supernova =
explosions in terms of its luminosity.  The observations were executed as =
scheduled, and no anomalies were noted

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 36
                                        Successful : 36

                          Scheduled Reacquisitions : 42
                                        Successful : 42

   2.2 FHST Updates: 

                              Scheduled : 57
                             Successful : 54

       The updates at 186/0537Z, 186/0539Z, and 186/0835Z failed.  The =
first two of these failures preceeded a loss of lock from 186/063540Z to =
186/063552Z.  All these events are documented in HSTAR 5648.

       As described in HSTAR 5649, the FHST maps at 186/143821Z and =
186/161010Z failed.

   2.3 Operations Notes: 

       A quiet holiday weekend was experienced by operations personnel.

       A TTR was written for a negative acquisition at 186/213601Z.  =
Three minutes 51 seconds of recoverable ESTR #1 data was lost.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH