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HUBBLE SPACE TELESCOPE

DAILY REPORT #1906

PERIOD COVERED: 0000Z (UTC) 06/24/97 - 0000Z (UTC) 06/25/97

Daily Status Report as of 176/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 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.

1.2 Completed WF/PC-2 6902 (WF/PC-2 Cycle 6 Photometric Calibration
Monitor UV/OPT STD)

The WF/PC-2 was used to make both ultraviolet and optical
photometric observations of the standard star GRW+70D582 as part of a Cycle
6 calibration procedure. These observations were done immediately before
and after decontamination procedures. The observations were completed as
planned, and no problems were reported.

1.3 Completed Two Sets of NIC/1/2/3 7038 (NICMOS Target Acquisition Test)

This test will verify the ability of NICMOS and NSSC-1 flight
software to perform Mode-2 (onboard autonomous) target acquisitions on
target P035-R in support of coronographic imaging. The efficacy of target
location, image centration and coordinate transformation (field distortion
an SI-to-FGS) on-board software will be evaluated. Flight software data
table updates derived from the pre- and post-target acquisition images and
FGS data may follow the execution of this test. The test completed
nominally with no reported problems.

1.4 Completed 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 bulge in spiral galaxy NGC-5448. Near-IR data at HST
resolution are essential for correcting for the effect of dust and will
enable a user to derive robust nuclear properties for the sample. The
observations were executed as scheduled, and no anomalies were noted.

1.5 Completed Three Sets of STIS/MA1 7086 (STIS22MB STIS Slit to
Detector Internal Stability - MAMA - Part 2)

The Space Telescope Imaging Spectrograph (MA1) was used to make
slit-to-detector internal stability calibration observations. This was to
determine the stability of the spectrograph to thermal variations in the
MAMA modes. A dark calibration image was also taken. The observations
were executed as scheduled, and no anomalies were noted.

1.6 Completed Two Sets of WF/PC-2 6903 (WF/PC-2 Cycle 6 Calibration:
Decontamination)

The WF/PC-2 was used to make several calibration bias observations,
internal flats, K-Spot images and dark calibration images which are all
part of a Cycle 6 decontamination procedure. No science was interleaved
with the dark exposures. The observations were completed as scheduled, and
no problems were reported.

1.7 Completed Three Sets of NIC/1/2/3 7704 (NICMOS MULTIACCUM Dark
Characterization 2/8)

The purpose of this proposal is to obtain group 2 of the on-orbit
darks for the MULTIACCUM predefined sequences requested by GOs, before the
start of Cycle 7. The observations completed with no reported problems.

1.8 Completed WF/PC-2 6887 (A Photometric Search for Faint Companions to
Nearby Stars)

The WF/PC-2 was used to make photometric search observations of the
nearby star HD128621 in order to look for possible companions. The
technique involves use of the Planetary Camera with wide band pass filters
to photometrically measure for the presence of resolved dark companions.
The observations were executed as scheduled, and no anomalies were noted.

1.9 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.

1.10 Completed STIS/CCD 7700 (STIS Non-Scripted Parallel Archive Proposal)

The Space Telescope Imaging Telescope (CCD) was used to obtain
slitless spectroscopy with the G750L grism 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. This suggests that star formation rates were higher than
at present,and that AGN may have been more frequent. The low background
and high resolution of HST separates these objects from the background.
The proposal completed as planned, and no problems were reported.

1.11 Completed 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 grism 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. The observations were completed as planned, and no
anomalies were reported.

1.12 Completed NIC/1/2/3 7703 (NICMOS MULTIACCUM Dark Characterization 1/8)

The purpose of this proposal is to obtain group 1 of the on-orbit
darks for the MULTIACCUM predefined sequences requested by GOs, before the
start of Cycle 7. The observations completed with no reported problems.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 9
Successful : 9

Scheduled Reacquisitions : 4
Successful : 4

2.2 FHST Updates:

Scheduled : 16
Successful : 16

2.3 Operations Notes:

There were no reported operational problems.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science and SMOV operations.

/DMH