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HUBBLE SPACE TELESCOPE

DAILY REPORT #3017

PERIOD COVERED: 0000Z (UTC) 12/12/01 - 0000Z (UTC) 12/13/01

Daily Status Report as of 347/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed STIS/CCD/MA2 9119 (Io's Prometheus Plume, and the
Composition and Spatial Distribution of Io's Atmosphere)

The Space Telescope Imaging Spectrograph (CCD and MA2) was used to
obtain the most detailed view yet of Io's dynamic SO_2 / S_2 atmosphere,
and the first spectroscopic observations of a Prometheus-type plume, to
test models of plume and atmospheric chemistry and dynamics. The proposal
completed a splanned.

1.2 Completed Three Sets of WF/PC-2 8937 (Cycle 9 Supplemental Darks pt2/3)

The WF/PC-2 was used obtain three dark frames every day to provide
data for monitoring and characterizing the evolution of hot pixels. No
problems were encountered.

1.3 Completed WF/PC-2 8942 (Cycle 10 Intflat Sweeps and Linearity Test)

The WF/PC-2 was used to monitor the pixel-to-pixel flatfield
response and provide a linearity check. These intflat sequences are done
once during the year and the images will provide a backup database in the
event of complete failure of the visflat lamp as well as allow monitoring
of the gain ratios. There were no reported problems.

1.4 Completed Two Sets of STIS/CCD 8901 (Dark Monitor-Part 1)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the darks. There was no anomalous activity.

1.5 Completed Three Sets of WF/PC-2 9244 (POMS Test Proposal: WFII
Parallel Archive Proposal Continuation)

The WF/PC-2 was used to perform a generic target version of the
Archival Pure Parallel program. The program will be used to take parallel
images of random areas of the sky, following the recommendations of the
Parallels Working Group. The observations completed with no anomalous
activity.

1.6 Completed STIS/CCD 8588 (Gamma-Ray Bursts and their Host Environments)

The Space Telescope Imaging Spectrograph (CCD) was used to
investigate the physics of gamma-ray bursts {GRBs} and the nature of their
host galaxies. The approach is three-pronged: 1} rapid HST ultraviolet
spectroscopy and Chandra imaging obtained within two days of an outburst
will allow probing the physics of the relativistic fireball and the nature
of the ISM surrounding the GRB; 2} long-term optical monitoring of the
optical transient {OT} will permit testing the hypothesis that GRBs are
frequently highly collimated and to determine whether supernovae underlie
GRBs; 3} Chandra and HST observations of "dark" GRBs will allow probing one
of the greater mysteries surrounding GRBs, the nature of the bursts without
optical counterparts. There were no reported problems.

1.7 Completed STIS/CCD 9285 (POMS Test Proposal: STIS Non-scripted
Parallel Proposal Continuation III)

The Space Telescope Imaging Spectrograph (CCD) was used to make low
galactic latitude, non-scripted parallel observations as part of a POMS
test proposal. The observations were completed as planned, and no
anomalies were reported.

1.8 Completed WF/PC-2 9249 (POMS Test Proposal: WFII Backup Parallel
Archive Proposal II)

The WF/PC-2 was used to execute a POMS test proposal designed to
simulate scientific plans. The proposal completed with no reported problems.

1.9 Completed WF/PC-2 8584 (Calibrating the Metallicity Dependence of
the Cepheid PL Relation)

The WF/PC-2 was used to determine the uncertainty in the metal
abundance dependence of the Cepheid PL relation that remains as one of the
largest sources of systematic error in the Cepheid distance scale and in
the extragalactic distance scale as a whole. There were no reported problems.

1.10 Completed STIS/CCD 9066 (Closing in on the Hydrogen Reionization
Edge of the Universe)

The Space Telescope Imaging Spectrograph (CCD) was used in parallel
constrain the Hydrogen reionization edge in emission that marks the
transition from a neutral to a fully ionized IGM at a predicted
redshifts. The proposal completed uneventfully.

1.11 Completed STIS/CCD 8903 (Bias Monitor - Part 1)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the bias in the 1x1, 1x2, 2x1, and 2x2 bin settings at gain=1, and 1x1 at
gain = 4 to build up high-S/N superbiases and track the evolution of hot
columns. There were no problems.

1.12 Completed STIS/CCD 9070 (A Census of Nuclear Star Clusters in
Late-Type Spiral Galaxies: II. Spectroscopy and Stellar Populations)

The Space Telescope Imaging Spectrograph (CCD) was used to
investigate spiral galaxies that have a prominent star cluster in their
dynamical center. Statistics for cluster frequency, size, and luminosity
remain incomplete. The proposal completed as planned.

1.13 Completed WF/PC-2/STIS/CCD/MA2 7514 (Observations of Orion --
Probing the Origin of Abundance Anomalies in H II Regions)

The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD and
MA2) were used to perform a set of observations of emission-line
diagnostics of the Orion Nebula, the brightest and best-resolved H II
region. The major goal is to provide reliable elemental abundances in this
benchmark of the ISM. The observations completed with no reported
anomalous activity.

1.14 Completed Four Sets of WF/PC-2 8940 (Cycle 10 Earth Flats)

The WF/PC-2 was used to monitor flatfield stability by obtaining
sequences of Earth streak flats to construct high quality flat fields for
the WF/PC-2 filter set. These flat fields will allow mapping of the OTA
illumination pattern and will be used in conjunction with previous internal
and external flats to generate new pipeline superflats. The proposal
completed without incident.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 8
Successful: 8

Scheduled Re-acquisitions: 7
Successful: 7

2.2 FHST Updates:
Scheduled: 15
Successful: 15

2.3 Operations Notes:

On numerous occasions, ROP DF-09A was used to change telemetry
formats to both PN and HN formats.

The SSR-1 EDAC error counter was cleared at 346/2351Z per ROP SR-1A.

The engineering status buffer limits (SESBSLD=6 and SESBSLD=7) were
adjusted at 346/1833Z and at 347/0925Z.

A TTR was written when there was a required re-transmit during a
486 load at 347/090934Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW