Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/hst_status_01_09_02 Дата изменения: Wed Jan 9 14:55:41 2002 Дата индексирования: Sat Dec 22 19:27:53 2007 Кодировка: Поисковые слова: dark nebula

HUBBLE SPACE TELESCOPE

DAILY REPORT #3030

PERIOD COVERED: 0000Z (UTC) 01/08/02 - 0000Z (UTC) 01/09/02

Daily Status Report as of 009/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed 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.

1.2 Completed Two Sets of STIS/CCD 9088 (Next Generation Spectral
Library of Stars)

The Space Telescope Imaging Spectrograph (CCD) was used to produce
a "Next Generation'' Spectral Library of 600 stars for use in modeling the
integrated light of galaxies and clusters by using the low dispersion UV
and optical gratings of STIS. The library will be roughly equally divided
among four metallicities, very low {Fe/H < -1.5}, low {-1.5 < Fe/H < -0.5},
near-solar {-0.5 < Fe/H < 0.1}, and super-solar {Fe/H > 0.1}, well-sampling
the entire HR-diagram in each bin. Such a library will surpass all extant
compilations and have lasting archival value, well into the Next Generation
Space Telescope era. No problems occurred.

1.3 Completed Two Sets of WF/PC-2 8935 (Cycle 10 Standard Darks)

The WF/PC-2 was used to obtain 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. Over an extended
period these data will also provide a monitor of radiation damage to the
CCDs. The proposal completed with no reported problems.

1.4 Completed STIS/CCD/MA2 9084 (Physical Parameters of the Erupting
Luminous Blue Variable NGC 2363-V1)

The Space Telescope Imaging Spectrograph (CCD and MA2) was used to
observe a bright variable star in the giant extragalactic H , ii region NGC
2363 discovered in 1992. Subsequent photometry and high quality
spectroscopy of this star revealed that observers are witnessing a
significant event in the evolution of a massive star, namely a major
eruption of a Luminous Blue Variable {LBV}. It is proposed to obtain high
quality STIS spectra of this star once a year for the next three observing
Cycles. The proposal completed nominally.

1.5 Completed WF/PC-2 9318 (POMS Test Proposal: WFII Parallel Archive
Proposal Continuation)

The WF/PC-2 was used to perform the generic target version of the
WFPC2 Archival Pure Parallel program. The program was used to take
parallel images of random areas of the sky, following the recommendations
of the Parallels Working Group. There were no reported problems.

1.6 Completed WF/PC-2 9118 (Tracing the Cosmic Expansion to z>1 with
Type Ia Supernovae)

The WF/PC-2 was used to observe type Ia supernovae in order to
provide evidence for an accelerating universe. The case for cosmic
acceleration rests almost entirely on the observation that the observed SN
Ia at z~0.5 are 0.25 magnitudes fainter than expected for a
non-accelerating Universe. It is proposed to follow five SN Ia in the
range 0.95 J-band follow-up campaign, the proposers can expect to measure the mean
luminosity distance of the sample at z~ 1.05 to better than 5. At these
redshifts, the effect of Omega_Lambda has all but vanished and the Universe
was decelerating due to its known matter content. Because any simple
systematic error will deviate substantially from the non-monotonic effect
of a Omega_Lambda > 0 cosmology, this experiment is a powerful and
straightforward way to assess the reliability of the SN Ia
measurements. In addition, if SN Ia are reliable standard candles, the
proposed observations will significantly increase the precision with which
Omega_Lambda and Omega_M are measured. There was no reported anomalous
activity.

1.7 Completed STIS/CCD 8906 (Hot Pixel Annealing)

The Space Telescope Imaging Spectrograph (CCD) was used to measure
the effectiveness of the CCD hot pixel annealing process by measuring the
dark current behavior before and after annealing and by searching for any
window contamination effects. In addition, CTE performance is examined by
looking for traps in a low signal level flat. There were no reported problems.

1.8 Two Sets of 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.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 3
Successful: 3

Per HSTAR 8460, at 008/182210 the scan step limit was exceeded on
FGS-3. On the second attempt, however, fine lock was successful. No
science was affected.
Scheduled Re-acquisitions: 11
Successful: 11

2.2 FHST Updates:
Scheduled: 8
Successful: 8

2.3 Operations Notes:

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

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW