Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_99/hst_status_11_02_99 Дата изменения: Tue Nov 2 15:02:36 1999 Дата индексирования: Sun Dec 23 11:05:30 2007 Кодировка: Поисковые слова: ultraviolet

HUBBLE SPACE TELESCOPE

DAILY REPORT #2491

PERIOD COVERED: 0000Z (UTC) 11/01/99 - 0000Z (UTC) 11/02/99

Daily Status Report as of 306/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed STIS/MA1 8211 (An Ultraviolet Census of Counterparts to
Highly Luminous X-ray Sources in M31 Globular)

The Space Telescope Imaging Spectrograph (MA1) was used to make
ultraviolet observations of highly luminous x-ray sources in globular
clusters in the Andromeda galaxy (a.k.a., NGC-224). The cores of certain
globular clusters in our Galaxy contain some of the most extraordinary
stars known, identified by their intense, near-Eddington limited X-ray
emission. The observations were executed as scheduled, and no anomalies
were noted.

1.2 Completed Two Sets of WF/PC-2 8090 (POMS Test Proposal: WF-II
Parallel Archive Proposal Continuation)

The WF/PC-2 was used in the parallel mode to make some low galactic
latitude archive observations. The program will be used to take parallel
images of random areas of the sky. The observations were executed as
scheduled, and no anomalies were noted.

1.3 Completed WF/PC-2 8059 (POMS Test Proposal: WF-2 Targeted Parallel
Archive Proposal)

The WF/PC-2 was used to make observations in parallel with the
prime science observations. The parallel opportunities available with
WF/PC-2 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. The
observations were completed as planned, and no anomalies were reported.

1.4 Completed Four Sets of WF/PC-2 8442 (WF/PC-2 Cycle 8 Standard Darks)

The WF/PC-2 was used to make a series of Cycle 8 standard dark
calibration observations. This dark calibration program obtains 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. The observations were executed as scheduled, and no anomalies
were noted.

1.5 Completed Two Sets of STIS/CCD 8408 (STIS CCD Dark Monitor C8)

The Space Telescope Imaging Spectrograph (CCD) was used to make a
CCD bias calibration observation. This is to monitor the darks for the
STIS CCD. The observations were executed as scheduled, and no anomalies
were reported.

1.6 Completed WF/PC-2 8160 (The Optical Counterpart of the Soft
Gamma-Ray Repeater 1900+14)

The WF/PC-2 was to be used to make observations of NGC-104 to
search for the optical counterpart of the soft gamma-ray repeater
1900+14. As described in HSTAR 7335 and yesterday's report, the
acquisition for this proposal failed, the take data flag remained down, and
all observations were lost.

1.7 Completed STIS/CCD 7912 (STIS Parallel Archive Proposal - Nearby
Galaxies - Imaging and Spectroscopy)

The Space Telescope Imaging Spectrograph (CCD) was to be used to
make parallel observations of nearby galaxies. As described in HSTAR 7335
and yesterday's report, the acquisition for this proposal failed, the take
data flag remained down, and eleven observations were lost.

1.8 Completed Two Sets of WF/PC-2 8443 (WF/PC-2 Cycle-8 Supplemental
Darks pt1/3)

The WF/PC-2 was used to obtain three dark frames every day to
provide data for monitoring and characterizing the evolution of hot
pixels. As described in HSTAR 7335 and yesterday's report, the acquisition
for the first iteration of this proposal failed, the take data flag
remained down, and all observations were lost. Otherwise, the observations
were completed as planned, and no further problems were reported.

1.9 Completed STIS/CCD 8409 (STIS CCD Bias Monitor C8)

The Space Telescope Imaging Spectrograph (CCD) was used to make a
CCD bias calibration observation. This is 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 to track the evolution of hot columns. The
observations were executed as scheduled, and no anomalies were reported.

1.10 Completed WF/PC-2 8396 (WF/PC-2 Observations of Astrophysically
Important Visual Binaries - Continued)

The WF/PC-2 was used to make observations of the visual binary star
Procyon. We recently used WF/PC-2 images of Procyon A and B to measure an
extremely accurate separation of the bright F star and its much fainter
white-dwarf companion. The observations were completed as planned, and no
anomalies were reported.

1.11 Completed Two Sets of STIS/CCD 8549 (POMS Test Proposal: STIS
non-scripted parallel proposal continuation III)

The Space Telescope Imaging Spectrograph (CCD) was used to make
high galactic latitude observations as part of a non-scripted POMS Test
Proposal. The observations were completed as scheduled, and no problems
were reported.

1.12 Completed Three Sets of STIS/CCD 8411 (STIS CCD Spectroscopic
Flats C-8)

The Space Telescope Imaging Spectrograph (CCD) was used to obtain
CCD flats in the spectroscopic mode. The observations were completed as
scheduled, and no anomalies were reported.

1.13 Completed WF/PC-2 8307 (Morphology of High Radio Surface
Brightness Planetary Nebulae)

The WF/PC-2 was used to make observations of the high radio surface
of the planetary nebula PK074+02D1. The morphological transformation from
the spherically symmetric circumstellar envelopes of AGB stars to the
complex, bipolar structures of planetary nebulae has remained one of the
major unresolved problems in the late stages of stellar evolution. The
observations were completed as planned, and no problems were reported.

1.14 Completed Two Sets of STIS/CCD 8202 (Bright Quasar Close Lensing
Search)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of HCLQ2332-0 as part of a second generation survey to search
for bright lensing quasars. With the restored PSF, new images will be
considerably more sensitive to the presence of both close separation and
faint lens components, and because STIS reaches two magnitudes fainter the
PC, the new snapshot images will have much greater dynamic range. The
observations were executed as scheduled, and no anomalies were noted.

1.15 Completed STIS/CCD/MA1 7292 (Measurement of the Cosmological
Baryon to Photon Ratio)

The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make observations of PG1718+481 in order to study its cosmological barion
to proton ratio. The primordial D/H ratio is the most sensitive measure of
the baryon to photon ratio, a fundamental cosmological number with wide
ranging uses. A wavelength calibration image was also taken. The
observations were completed as planned, and no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 9
Successful: 9

Scheduled Re-acquisitions: 7
Successful: 7

2.2 FHST Updates:
Scheduled: 22
Successful: 22

2.3 Operations Notes:

The SSR EDAC error counter was cleared three times per ROP SR-1.

The NICMOS FPA temperature sensor for detector 2 was enabled at
305/1218Z.

A TTR was written for a line outage which resulted in a loss of
engineering data from 305/154500Z until 305/154853Z. The SSR was
subsequently re-dumped in order to recover the missing data. EDP
successfully collected the data, but CCS did not. HSTAR 7337 covers this
failure.

The ground system is processing inputs for target of opportunity
observations, using the STIS/MAMA, for the latter part of the week. These
observations, if instituted, will investigate SN1999em in NGC1637.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW