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HUBBLE SPACE TELESCOPE

DAILY REPORT #2732

PERIOD COVERED: 0000Z (UTC) 10/19/00 - 0000Z (UTC) 10/20/00

Daily Status Report as of 294/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed Three Sets of WF/PC-2 8826 (Cycle 9 Supplemental Darks pt 1)

The WF/PC-2 was used to perform a T dark calibration program that
obtains three dark frames every day in order to provide data for monitoring
and characterizing the evolution of hot pixels. There were no reported
anomalies.

1.2 Completed Two Sets of STIS/CCD 8837 (CCD Dark Monitor-Part 1)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the darks. The proposal completed with no reported problems.

1.3 Completed STIS/CCD 8684 (Emission Lines from Photoionized Accretion
Disks and Winds in AGNs)

The Space Telescope Imaging Spectrograph (CCD) was used to observe
the origin and dynamics of the gas that produces the broad optical and
ultraviolet emission lines in AGNs, a fundamental gap that remains in our
knowledge of AGNs. The proposal completed with no reported problems.

1.4 Completed Two Sets of WF/PC-2 8805 (POMS Test Proposal: WFII
Parallel Archive Proposal Continuation)

The WF/PC-2 was used to perform a generic target version of the
WFPC2 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 proposal completed with no reported
problems.

1.5 Completed STIS/CCD 8104 (Constraints on the Evolution of Powerful
Radio Galaxies)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of 3C303.1. Recent work has identified the GHz Peaked
Spectrum and Compact Steep Spectrum radio sources as the most likely
candidates for the progenitors of the large-scale powerful classical double
sources. Both a wavelength calibration image and a CCD flat calibration
image were also taken. The observations were completed as planned, and no
anomalies were reported.

1.6 Completed WF/PC-2 8601 (A Snapshot Survey of Probable Nearby Galaxies)

The WF/PC-2 was used to continue the very successful snapshot
survey in order to use the high spatial resolution of HST to determine
whether selected galaxies are nearby on the basis of resolution into stars,
and the magnitudes and colors of the brightest stars. There were no
reported problems.

1.7 Completed STIS/CCD 8562 (Probing the Large Scale Structure: Cosmic
Shear Observations)

The Space Telescope Imaging Spectrograph (CCD) was used to probe
the distortion of light bundles from distant galaxies, looking at the
statistical properties of the intervening inhomogeneous {dark} matter
distribution. The proposal completed nominally.

1.8 Completed STIS/CCD 8838 (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. The proposal completed nominally.

1.9 Completed STIS/CCD/MA1 8691 (Calibrating the Cosmic Meter Stick:
The Distance to the LMC Using Eclipsing Binaries)

The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
measure the LMC distance which is crucial for the calibration of the Cosmic
Distance Scale. The loss-of-lock described in 2.1 and HSTAR 7917 occurred
during this proposal, possibly affecting an observation. Otherwise, the
observations completed with no further reported problems.

1.10 Completed WF/PC-2 8816 (Cycle 9 UV Earthflats)

The WF/PC-2 was used to obtain sequences of earth streak flats to
improve the quality of pipeline flat fields for the WFPC2 UV filter set and
in order to monitor flat field stability. There were no reported problems.

1.11 Completed Two Sets of WF/PC-2 8059 (POMS Test Proposal: Targeted
Parallel Archive Proposal)

The WF/PC-2 was used to observe the parallel opportunities
available in the neighborhood of bright galaxies are treated in a slightly
different way from the normal pure parallels. Local Group galaxies offer
the opportunity for a closer look at young stellar
populations. Narrow-band images in F656N can be used both to identify
young stars via their emission lines, and to map the gas distribution in
star-forming regions. The loss-of-lock described in 2.1 and HSTAR 7917
occurred during the first iteration of this proposal, possibly affecting an
observation. Otherwise, the observations completed nominally.

1.12 Completed STIS/CCD 8291 (The Alpha-Element/Iron Ratio in Starburst
Populations)

The Space Telescope Imaging Spectrograph (CCD) was used to observe
A and F supergiants in NGC1569, the closest starburst galaxy. Spectra
around 6200 Angstrom taken with the G750M grating will be used to determine
element abundances of Fe and several Alpha-elements. The galaxy has
experienced a strong starburst over the past few hundred Myr and possibly
only very few and much less intense episodes of star formation at earlier
epochs. Chemical evolution models predict a significant Alpha/Fe
enhancement in the galaxy. The proposal completed with no reported anomalies.

1.13 Completed WF/PC-2 8829 (Observatory Focus Monitor)

The WF/PC-2 was used to analyze the HST focus which drifts slowly
and shows evidence of undergoing slips of a few microns at random
times. The rate of the WFPC2 monitoring program is insufficient to track
and/or understand OTA behavior in order to request timely and appropriate
secondary mirror corrections. This 14 orbit program obtains a large amount
of high signal to noise focus data, sometimes in two Science Instruments at
once, and will be sufficient to more accurately define the HST
focus. There were no reported problems

1.14 Completed STIS/CCD 8631 (Bright Quasar Close Lensing Search II)

The Space Telescope Imaging Spectrograph (CCD) was used to expand
the Cycle 8 second generation HST snapshot survey of bright quasars,
optimized to find lenses with component image separations < 1". The
observations completed nominally.

2.0 FLIGHT OPERATIONS SUMMARY:

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

Scheduled Re-acquisitions: 5
Successful: 5

FGS-2 lost lock during the re-acquisition at 293/121757Z when the
scan step was exceeded. However, the re-acquisition was
successful. Proposals described in 1.9 and 1.11 may have been affected.

2.2 FHST Updates:
Scheduled: 19
Successful: 19

2.3 Operations Notes:

Using ROP SR-1A, the SSR EDAC error counter was cleared five times.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW