Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_00/hst_status_10_25_00 Дата изменения: Wed Oct 25 14:41:13 2000 Дата индексирования: Sun Dec 23 10:17:27 2007 Кодировка: Поисковые слова: trifid nebula

HUBBLE SPACE TELESCOPE

DAILY REPORT #2735

PERIOD COVERED: 0000Z (UTC) 10/24/00 - 0000Z (UTC) 10/25/00

Daily Status Report as of 299/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 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.

1.2 Completed 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.

1.3 Completed WF/PC-2 8634 (Atmospheric Variability on Uranus and Neptune)

The WF/PC-2 was used to obtain snapshot observations of Uranus and
Neptune to monitor changes in their atmospheres on time scales of months to
years. Uranus is rapidly approaching equinox in 2007, with another 4
degrees of latitude in the northern hemisphere becoming visible every
year. Recent HST images during this unique epoch have revealed: {i}
strongly wavelength-dependent latitudinal structure, {ii} the presence of
numerous visible-wavelength cloud features in the northern hemisphere, and,
{iii} in the near-IR, discrete features northward of 25degrees N that have
the highest contrast ever seen for a Uranian cloud. Long-term ground-
based observations show seasonal brightness changes whose origins are not
well understood. Recent IR images of Neptune obtained using adaptive
optics on the Keck Telescope indicate that a new "Bright Companion" type of
feature has recently appeared in the southern hemisphere. Snapshot
observations of these two dynamic planets can supply context in which to
discern the nature of long-term changes in their latitudinal atmospheric
bands and to track the appearance, movement, and disappearance of discrete
albedo features. There were no reported problems.

1.4 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.

1.5 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.

1.6 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.

1.7 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.

1.8 Completed STIS/CCD 8340 (Probing the Kinematics of the Narrow-Line
Region in Seyfert Galaxies with Slitless Spectroscopy)

The Space Telescope Imaging Spectrograph (CCD) was used to perform
studies of the gas kinematics of the narrow-line regions in Seyfert
galaxies. Previous studies indicate complex velocity fields, with evidence
for both gravitational and non-gravitational forces. The proposal
completed nominally.

1.9 Completed Four 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.

1.10 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 STIS/CCD/MA2 8111 (CS 22892--052: A Rosetta Star for the
Age and Early History of the Galaxy)

The Space Telescope Imaging Spectrograph (CCD and MA2) was used to
make observations of the "Rosetta" star CS 22892-052. These observations
should provide significant new information about the early history of the
galaxy, specifically the nature of the earliest generations of stars and
the types of nucleosynthetic processes that occurred in those stars. The
observations were executed as scheduled, and no anomalies were noted.

1.12 Completed STIS/MA1/MA2 8843 (Cycle 9 MAMA Dark Measurements)

The Space Telescope Imaging Spectrograph (MA1 and MA2) was used to
perform the routine monitoring of the MAMA detector dark noise. The
proposal completed nominally.

1.13 Completed STIS/CCD/MA1 8638 (Temperature Scale And Metal
Abundances Of Hot Hydrogen-Rich Central Stars Of Planetary Nebulae)

The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
perform UV spectroscopy on a sample of hot hydrogen-rich central stars of
PNe, covering the hottest phase of post-AGB evolution. The spectra will
then be analyzed with fully metal line blanketed NLTE model atmospheres in
order to determine T_eff, surface gravity, and chemical composition. The
proposal completed with no reported problems.

1.14 Completed STIS/CCD 8856 (CCD Sensitivity Monitor C9)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the sensitivity of each CCD grating mode to detect any change due to
contamination or other causes. The proposal also monitor the STIS focus in
an imaging mode. There were no anomalies.

2.0 FLIGHT OPERATIONS SUMMARY:

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

Scheduled Re-acquisitions: 8
Successful: 8

2.2 FHST Updates:
Scheduled: 21
Successful: 21

2.3 Operations Notes:

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

An HST486 RAM memory dump was commanded at 298/1522Z per an
operations request. HSTAR 7925 was written when the dump was not properly
received on CCS "A" string. The dump, however, was successfully collected
on CCS "G" string

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW