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HUBBLE SPACE TELESCOPE

DAILY REPORT #1966

PERIOD COVERED: 0000Z (UTC) 09/18/97 - 0000Z (UTC) 09/19/97

Daily Status Report as of 262/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Three Sets of WF/PC-2 7621 (WF/PC-2 Cycle 7 Supplemental
Darks PT1/3)

The WF/PC-2 was used to make supplemental dark calibration images.
This set of calibrations is intended to obtain three dark frames every day
to provide data for monitoring and characterizing the evolution of hot
pixels. The observations were executed as scheduled, and no anomalies were
noted.

1.2 Completed 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.

1.3 Completed Four Sets of STIS/CCD 7601 (CCD Dark and Bias Monitor)

The Space Telescope Imaging Spectrograph (CCD) was used to conduct
bias and dark monitoring. Also, observations were made to track the growth
of hot pixels on the CCD in general and within the various target
acquisition apertures specifically. The observations were completed as
planned, and no anomalies were reported.

1.4 Completed 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-151, 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.

1.5 Completed STIS/CCD 7276 (Synoptic Monitoring of Seasonal Phenomena
on Mars)

The Space Telescope Imaging Spectrograph (CCD) was used to make
seasonal ultraviolet imaging of the planet Mars. This season includes the
formation of the north polar cap and hood system, a process which is not
well documented; the start of the classic dust storm season on Mars, when
large dust storms have often occurred; and an active cycle of small dust
storms in Hellas. These observations will complete a period of continuous
monitoring of Mars which commenced in Cycle 6. The observations were
completed as planned, and no problems were reported.

1.6 Completed Two Sets of NIC/2 7420 (A Near-Infrared Search for Very
Low Mass Companions to Stars Within 10 Parsecs of the Sun)

The Near Infrared Camera (Camera Two) was used to make searching
observations for very low mass companions to variable stars CD-40D9712 and
LHS546. These stars are known to be within 10 parsecs of the Sun. The
observations were executed as scheduled, and no anomalies were noted.

1.7 Completed Two Sets of WF/PC-2 7623 (WF/PC-2 Cycle 7 Internal Flats)

The WF/PC-2 was used to make a set of internal Cycle 7 calibration
flats which are designed to monitor the pixel to pixel flat field response
and the visflat lamp degradation, as well as detect any possible changes
due to contamination. The calibration observations were completed as
planned, and no problems were reported.

1.8 Completed NIC/1/2/3 7714 (Observations of the Rest-Frame Optical
Morphology of a Statistically Significant Sample of Normal Galaxies at
Redshift z~3.)

The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the galaxy 1417+5228. It is planned to use 30 orbits
with NICMOS to study the rest-frame optical morphology of star-forming
galaxies at redshift z~3 selected with the Lyman-limit technique. The
observations were executed as scheduled, and no anomalies were noted.

1.9 Completed STIS/CCD 7783 (STIS Parallel Science)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations taken in parallel with the prime science. The observations
were completed , and no problems were reported.

1.10 Completed WF/PC-2/NIC/2 7445 (Study of Jovian Dynamics by Combining
Global and Temporal HST Observations with Galileo Data)

The WF/PC-2 and the Near Infrared Camera (Camera Two) were used to
make observations of the planet Jupiter in order to study its dynamics.
Due to Galileo's limited data rate and the small imaging field of view, HST
has become vital in understanding the global perspective of this data. The
observations were executed as scheduled, and no anomalies were noted.

1.11 Completed WF/PC-2 7430 (Jovian Global Photometry During the Galileo
Epoch)

The WF/PC-2 was used to make observations of the planet Jupiter as
part of the Jovian Global photometry study during the Galileo epoch. The
observations are targeted to broaden the perspective of the spatially-,
temporally-, and spectrally-limited sampling of Jupiter by Galileo, thus
providing a strategic supplement to the atmospheric science derived from
the Galileo mission. The observations were executed as scheduled, and no
anomalies were noted.

1.12 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.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 11
Successful : 11

Scheduled Reacquisitions : 6
Successful : 6

2.2 FHST Updates:

Scheduled : 19
Successful : 19

2.3 Operations Notes:

HSTAR 6171 describes a HGA excessive torque which flagged at
261/1151Z and stayed outside nominal conditions for approximately 10
minutes. This occurred just after a spline.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH