Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_94/hst_status_04_04_94 Дата изменения: Wed Apr 6 00:17:20 1994 Дата индексирования: Sun Dec 23 10:31:44 2007 Кодировка: Поисковые слова: cygnus

HUBBLE SPACE TELESCOPE
DAILY REPORT #1110

PERIOD COVERED: 0700 EST
Daily Status Report as of 095/1200Z.

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed GHRS/2 5357 (Cepheid Masses: Cycle 4 High)

The High Resolution Spectrograph (Side two) was used to make
ultraviolet spectral observations of binary Cepheid star HD183344 to
determine its mass. Twelve observations were received and displayed
in the OSS. They were reported to be satisfactory. A wavelength
calibration observation was also taken.

1.2 Completed FOS/BL 5530 (FOS Location of Spectra and Aperture)

The Faint Object Spectrograph (Blue Side) was used to make Y-base
maps of the FOS detectors using internal lamps. The purpose is to
determine the location of the spectra on the diodes. A total of nine
observations were received and displayed. They all were reported to
be okay.

1.3 Completed Three Sets of WF/PC-2 5561 (WF/PC-2 Cycle 4 Calibration:
Internal Monitor. 2: Flats)

The WF/PC-2 was used to make a internal dark and a visual flat
calibration images to monitor flat field stability and the stability
of the analog-to-digital converters. Both observations were
monitored by the OSS, and no anomalies were noted.

1.4 Completed WF/PC-2 5476 (Continuum Snapshots fo 3CR Radio Galaxies)

The WF/PC-2 was used to make snapshot images of radio galaxy 3C227.0
as part of a continuum survey and to study the galaxy's morphology.
Eight images were received and displayed. Two images were reported
to have had recenterings, but looked okay. The other six images were
okay.

1.5 Completed WF/PC-2 5343 (WFC Imaging of Nearby Bright Quasars)

The WF/PC-2 was used to make images of the bright quasar PG1307+085
and its host galaxy. The goal is to study the morphology of this
galaxy, and to see how it differs from non-QSO galaxies. They also
will be looking for the relationship between the properties of the
host galaxy and the luminosity of the quasar. A real-time pointing
correction was successfully uplinked to the spacecraft. Three images
were received and displayed. They were reported to be okay.

1.6 Completed WF/PC-2 5560 (WF/PC-2 cycle 4 Calibration: Internal
Monitor. 1)

The WF/PC-2 was used to make several internal bias, K-Spot, and flat
calibration observations to monitor the CCD camera electronics, the
optical alignment, and for contamination. The data remains on the
science tape recorder and will be analyzed later. No anomalies were
noted.

1.7 Completed FOC/96 5140 (Observations of the Narrow Line Regions in
Nearby Seyfert Galaxies)

The Faint Object Camera (f/96) was used to make observations at
several different wavelengths of Seyfert galaxy MRK-6 which is
located near the Cygnus A source. This is to study relations between
the radio and optical emissions. The OSS monitored the observations,
and assessed the data quality. The science data still remains on the
science tape recorder. No anomalies were noted.

1.8 Completed WF/PC-2 5092 (GTO Low Latitude Parallel Program: Cycle 4)

The WF/PC-2 was used to make observations taken in parallel with the
prime science observations. This is part of a survey to take
pictures of a large number of fields within 30 degrees of the
galactic plane. The intent is to determine the luminosity function
of low mass stars and the mass density in the solar neighborhood.
The observations were made during LOS, and remain on the science
tape recorder. They will be analyzed later. No anomalies were noted.

1.9 Completed WF/PC-2 5612 (SMOV WF/PC-2 Decontamination)

The WF/PC-2 was used to perform decontamination operations.
Observations of standard A+81D266, and K-Spot observations were
also taken. The OSS monitored the observations, and assessed the
data quality. No anomalies were noted.

1.10 Completed WF/PC-2 5415 (The Distance to the M-96 Galaxy Group:
Cycle 4 Medium)

The WF/PC-2 was used to make observations of Cepheid variable stars
within the galaxy UGC-5889 which itself is located in the M-96
galaxy cluster. This is to help determine the distance to this
galactic group, and to improve the determination of the Hubble
constant. The observations were executed as scheduled, and no
anomalies were noted.

1.11 Completed GHRS/2 5506 (The Deuterium Abundance in Moderate Redshift
QSO Systems)

The High Resolution Spectrograph (Side Two) was used to make
observations of QSO 0454-220. A wavelength calibration image was
also made. The observations were executed as scheduled, and
monitored in the OSS. No anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 9
Successful : 9
Scheduled Reacquisitions : 8
Successful : 8
2.2 FHST Updates:

Scheduled :18
Successful :18

2.3 Significant HSTARs: None

2.4 Operations Notes:

Yesterday's reports on the solar array anomaly were partially in
error and require some clarification as to the time of occurrence.
The event actually happened on day 88 (Tuesday) at approximately
1738Z, but due to the benign nature of the problem it was not
detected during normal operations. It was observed on day 91
(Friday) when data became available for routine detailed data
analysis.

The tiger team has determined that a short circuit occurred from the
+E SPA hot wire to the +B SPA return wire. The +E SPA power output
(about 5% of the total SA output) has been lost. The failure path
within the SA is causing a misleadingly low reading of the SA
section 4 current telemetry, and is causing battery 5 to receive
less charge than the others. Normal science operations have been
ongoing since the failure. Reconfiguration of the EPS subsystem is
being contemplated for the near future to cause battery 5 to receive
charge commensurate with the others.

For the past 24 hours, there have been no additional problem reports
from any HST subsystem.

3.0 ACTIVITIES SCHEDULED FOR NEXT REPORTING PERIOD:

3.1 Complete GHRS/2 5299 (Highly Ionized Gas in the Warped Outer
Galaxies: Cycle 4 Medium)

3.2 Complete WF/PC-2 5561 (WF/PC-2 Cycle 4 Calibration: Internal
Monitor. 2: Flats)

3.3 Complete WF/PC-2 5415 (The Distance to the M-96 Galaxy Group: Cycle
4 Medium)

4.0 ANOMALY STATUS:

4.1 Significant New Anomalies: None

4.2 Significant Unresolved Anomalies: None

5.0 SIGNIFICANT FORTHCOMING EVENTS:

Nothing at this time.
/DMH -END-