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HUBBLE SPACE TELESCOPE

DAILY REPORT #1768

PERIOD COVERED: 0000Z (UTC) 11/26/96 - 0000Z (UTC) 11/27/96

Daily Status Report as of 332/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed FOS/BL 6637 (Determining the Morphology of the Intense =
Magnetic field in the Hot DA White Dwarf Stars)

The Faint Object Spectrograph (Blue Side) was used to make =
time-resolved spectrographic observations of the DA class, hot, white =
dwarf star RE0317-85 in order to model the morphology of its intense =
magnetic field. This star has a surface temperature of 50,000 deg. C and =
a 340 Mega-Gauss magnetic field. It also varies in intensity in a period =
of 725 seconds due to its rotation. The observations were executed as =
scheduled, and no anomalies were noted.

1.2 Completed Four 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.

1.3 Completed GHRS/1 6897 (Cycle 6: Condensed-Regimen Integrated =
Monitoring Program for Side One of the GHRS)

The High Resolution Spectrograph (Side One) was used to used to =
perform a condensed-regiman integrated monitoring calibration. This =
proposal combines into one program several aspects of instrument =
monitoring that ordinarily execute at the same frequency of two times per =
year. A wavelength calibration image was also taken. The observations =
were executed as scheduled, and no anomalies were noted.

1.4 Completed Two Sets of FOS/BL 6683 (Eclipsing Binaries in the =
Magellanic Clouds - Fundamental Properties A)

The Faint Object Spectrograph (Blue Side) was used to make =
spectrographic observations of O/B Class, eclipsing binary system star =
LMC-HV2274located in the Large Magellanic Cloud. From these data and the =
latest Kurucz model atmospheres and accurate temperatures will be =
derived. The observations were executed as scheduled, and no anomalies =
were noted.

1.5 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 3C139.2. Combined with existing data, these =
exposures will provide high spatial resolution information on the color =
distribution within this galaxy, 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.

1.6 Completed FGS 6566 (Calibrating the Mass-Luminosity Relation at =
the End of the Main Sequence)

The FGSs were used to make astrometric observations of the =
components of the low-mass, binary system, star GL648 in order to make a =
calibrations of the mass-luminosity relation at the end of the main =
sequence. The individual stars have masses of less than 0.2 solar =
masses. As described in HSTAR 5807 and reported in yesterday's daily, =
the acquisition near the beginning of this proposal, at 331/083045Z, =
obtained fine lock on FGS #1 only when the scan step limit was exceeded =
on FGS #2. The astrometry data set may have been impacted when FGS #3 =
was under SSM control throughout the continuous scan. Otherwise, the =
observations were completed as scheduled, and no further problems were =
noted.

1.7 Completed S/C/GHRS/2 6260 (Linear Extent and Ion Cond. in Lyman =
Alpha Cloud: Cycle 5 Observations)

The High Resolution Spectrograph (Side Two) was used to make =
spectrographic observations between 1215 A0 and 1500 A0 of the QSO =
Q0107-025A in order to study the linear extent and ion Lyman Alpha cloud. =
The binary QSO system will be searched for any absorption systems which =
may not be in common with the two objects, thus setting the limits on the =
linear size of its clouds. The observations were completed as planned =
and no anomalies were reported.

1.8 Completed GHRS/2 6898 (CRIMP2: Cycle 6 Condensed-Regimen Internal =
Monitoring Program)

The High Resolution Spectrograph (Side Two) was used to perform an =
internal condensed-regimen integrated monitoring program. Calibration =
observations of object BD28D4211 were taken. This proposal combines into =
one program several of the instruments monitoring observations that =
ordinarily are executed at the same frequency of twice per year. A =
wavelength calibration image was also taken. The observations were =
completed as schedule, and no anomalies were reported.

1.9 Completed Two Sets of WF/PC-2 6909 (WF/PC-2 Cycle 6 Calibration: =
Earth Flats)

The WF/PC-2 was used to make observations of the bright Earth to =
obtain streak flats which are used to construct high quality flat fields =
for the WF/PC-2 filter set. The observations were executed as scheduled, =
and no anomalies were noted.

1.10 Completed FGS 6151 (Masses of Pre-main Sequence Stars: Cycle 4 =
GO/CAL)

The FGSs were used to make observations of the pre-main sequence =
binary star ELIAS-12 located in the Taurus star forming region. The FGS =
data will provide the apparent orbits needed to compute the total mass of =
the system. The observations were executed as scheduled, and no =
anomalies were noted.

1.11 Completed Two Sets of WF/PC-2 6188 (WF/PC-2 Cycle 5 Calibration: =
Dark)

The WF/PC-2 was used to make internal dark calibration images. =
The observations were completed as scheduled, and no problems were =
reported.

1.12 Completed FOS/RD 6715 (Ultraviolet Spectra of Saturn's =
Satellites, Ion Modification)

The Faint Object Spectrograph (Red Side) was used to make =
ultraviolet spectrographic observations of Saturn's medium sized moon =
Rhea in order to study the ion modification of the moon's surface ice =
caused by one or more external processes. The observations were =
completed as scheduled, and no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 6
Successful : 4
Scheduled Reacquisitions : 10
Successful : 9

At 332/012500Z and at a subsequent re-acquisition, there were =
guide star acquisition failures when FGS #1 failed to acquire guide =
stars. HSTAR 5811 was written. Later, at 332/023000Z there was a guide =
star acquistion failure when FGS #3 failed to acquire guide stars. HSTAR =
5810 was written for this occurrence.

2.2 FHST Updates:

Scheduled : 10
Successful : 10

2.3 Operations Notes:

Real-time operations moved to the SAMS backup facility at 332/0630Z=
in preparation for maintenance activities in the MOR area.

Please note that this report will mot be issued again until after =
the long Thanksgiving holiday period. The next daily report will be =
prepared and delivered on December 2, 1996.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Nothing at this time.

/DMH