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HUBBLE SPACE TELESCOPE

DAILY REPORT #2050

PERIOD COVERED: 0000Z (UTC) 01/29/98 - 0000Z (UTC) 01/30/98

Daily Status Report as of 030/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed WF/PC-2 7622 (WF/PC-2 Cycle 7 Internal Monitor)

The WF/PC-2 was used to make a set of Cycle 7 internal monitoring
calibration measurements. A variety of internal exposures are obtained in
order to provide a monitor of the integrity of the CCD camera electronics
in both bays {gain 7 and gain 15}, a test for quantum efficiency in the
CCDs, and a monitor for possible buildup of contaminants on the CCD
windows. A bias calibration and an internal flat calibration image were
also taken. The observations were executed as scheduled, and no anomalies
were noted.

1.2 Completed FOC/96 7923 (FOC F/96 Turnon)

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.

1.3 Completed Two Sets of Sets of WF/PC-2 7620 (WF/PC-2 Cycle 7 Standard
Darks)

The WF/PC-2 was used to make a series of Cycle 7 standard dark
calibration images. This dark calibration program obtains dark frames
every week in order to provide data for the ongoing calibration of the CCD
dark current rate, and to monitor and characterize the evolution of hot
pixels. The observations were executed as scheduled, and no anomalies were
noted.

1.4 Completed Four Sets of NIC/1/3 7813 (NIC/3 HDF Darks)

The Near Infrared Camera (Cameras One and Three) was used to make
internal dark calibration images which will be used when processing the
Hubble Deep Field images during the first NICMOS Camera Three campaign.
The observations were executed as scheduled, and no anomalies were noted.

1.5 Completed NIC/3 7919 (NICMOS Camera 3 Campaign Snapshots)

The Near Infrared Camera (Camera Three) was used to make an image of
galaxies NGC-247 and NGC-4190 as part of the NICMOS Camera 3 campaign
snapshots. The proposal is to obtain wide field snapshot images of nearby
galaxies in Paschen Alpha which is inaccessible from the ground. As
reported in yesterday's report, the acquisition for this proposal defaulted
to fine lock on FGS-2 only and the single observation may have been
affected. Otherwise, the observation was executed as planned, and no
further anomalies were reported.

1.6 Completed NIC/1/2/3 7318 (Ages of Extreme Metallicity Globular
Clusters Near the Galactic Center)

The Near Infrared Camera (Cameras One, Two, and Three) was used to
make observations of the globular cluster NGC-6287 which is located near
our galactic center in order to determine the age of this extreme
metallicity cluster. Failure to detect an age difference will imply that
star formation and chemical enrichment occurred rapidly in the inner halo
if the clusters shared a common origin. The observations were completed as
planned, and no problems were reported.

1.7 Completed STIS/CCD 7635 (STIS CCD Hot Pixel Annealing)

The Space Telescope Imaging Spectrograph (CCD) was used to test the
hot pixel annealing procedure. The effectiveness of the CCD hot pixel
annealing process is assessed by measuring the dark current behavior before
and after annealing and by searching for any window contamination effects.
As reported in yesterday's report, the acquisition for this proposal
defaulted to fine lock on FGS-2 only and the two observations may have been
affected. Otherwise, the observations were completed as planned, and no
further problems were reported.

1.8 Completed NIC/3 7816 (NIC/3 Photometric Zero Point)

The Near Infrared Camera (Camera Three) was used to make
observations of standard star BRI0021-CAL in order to study the zero point
flux for a set of filters. The NIC/3 intra-pixel sensitivity will also be
measured. The observations were executed as scheduled, and no anomalies
were noted.

1.9 Completed Two Sets of NIC/1/2/3 7235 (Observations of the Hubble
Deep Field)

The Near Infrared Camera (Cameras One, Two, and Three) was used to
make observations of the Hubble Deep Field area HDF-123645. This program
observes a portion of the Hubble Deep Field with all three NICMOS cameras
in the F160W and F110W filters to produce infrared images equivalent in
depth to the existing WF/PC-2 HDF images. The observations were executed
as scheduled, and no anomalies were noted.

1.10 Completed Two Sets of STIS/CCD 7900 (STIS CCD Pure Parallels for
NIC/3 HDF)

The Space Telescope Imaging Spectrograph (CCD) was used to make pure
parallel, ultraviolet, slitless, observations with the NIC/3 Camera. This
proposal will run during the orbits devoted to NICMOS HDF prime proposal
7235. The observations were completed as scheduled, and no anomalies were
reported.

1.11 Completed NIC/1/2/3 7223 (Spectrophotometry and Imaging of Pluto
and Charon)

The Near Infrared Camera (Cameras One, Two, and Three) was used to
make observations of Charon. Detailed spectra of the individual members of
the Pluto-Charon system are not known. The observations were completed as
scheduled, and no problems were reported.

1.12 Completed STIS/MA1/MA2 7920 (STIS MAMA Pure Parallels for NIC/3 HDF)

The Space Telescope Imaging Spectrograph (MA1 and MA2) was used to
make parallel field, ultraviolet imaging to search for Lyman-break galaxies
at z>2.0, and z>1.0. The observations were completed as planned, and no
problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 7
Successful : 7

Scheduled Reacquisitions : 8
Successful : 8

2.2 FHST Updates:

Scheduled : 13
Successful : 13

2.3 Operations Notes:

The NICMOS Hubble Deep Field proposals continue to execute
nominally, along with the associated acquisition activity.

The STIS MAMA2 reset at 029/154817Z while the low voltage was on.
ROP NS-12 was performed at 029/161106Z to reset the STIS flight software
counter. The MAMAw was recovered via SMS commanding. HSTAR 6331 was
written. There was no impact to science.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH