Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_95/hst_status_11_21_95 Дата изменения: Tue Nov 21 14:23:08 1995 Дата индексирования: Sun Dec 23 10:41:10 2007 Кодировка: Поисковые слова: rings

HUBBLE SPACE TELESCOPE

DAILY REPORT #1521

PERIOD COVERED: 0000Z (UTC) 11/20/95 - 0000Z (UTC) 11/21/95

Daily Status Report as of 325/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed FOS/RD 5824 (Occultation of GSC5249 by Saturn)

The Faint Object Spectrograph (Red Side) was used to observe =
Saturn's atmosphere and its rings while being occulted by GSC5249. =
Spectra of the occulted star, of Saturn's atmosphere and of Saturn's rings =
will be obtained before and after the occultation. The observations were =
completed as planned, and no problems were reported.

1.2 Completed WF/PC-2 6216 (Saturn's Ring Atmosphere)

The WF/PC-2 was used to obtain images of Saturn's rings when they =
are edge-on to the Earth. The objective is to detect an "OH atmosphere" =
associated with the rings. Different filters will be used to discriminate =
between dust and OH emission, and to subtract scattered light. These =
observations will be used to determine exposure times for a later series =
of ring-plane crossing observations in August. The proposal completed as =
scheduled, and no anomalies were noted.

1.3 Completed Two Sets of WF/PC-2 6119 (Snapshot Survey for Companions of =
Planetary Nebula Nuclei)

The WF/PC-2 was used to make snapshot survey observations of =
planetary nebulae NGC-6891 and NGC-2392 to study their nuclei and to look =
for possible companions. The observations were executed as scheduled, and =
no anomalies were noted.

1.4 Completed WF/PC-2 5972 (Determination of the Extragalactic Distance =
Scale)

The WF/PC-2 was used to make observations of the galaxy NGC-2541 =
looking for standard candle Cepheid variable stars. The purpose of this =
observations is to help estimate the Hubble constant with an accuracy of =
10%. The observations were executed as scheduled, and no anomalies were =
noted.

1.5 Completed WF/PC-2 5983 (Curcumstellar Disks in Young Nebulous =
Clusters)

The WF/PC-2 was used to make observations of the young nearby =
nebulous cluster NGC-2024-1 looking for possible curcumstellar disks =
(Solar nebula analogs), like the type seen in the Orion Nebula. The =
observations were completed as planned, and no problems were reported.

1.6 Completed WF/PC-2 and GHRS 5942 (The Nature of the Star Formation =
Trigger in NGC 1068)

The WF/PC-2 and the High Resolution Spectrograph were used to =
observe four bright starburst knots in NGC-1068. The spectra will be =
analyzed to constrain the stellar ages and star formation history within =
the knots. The observations were completed as planned, and no problems =
were reported.

1.7 Completed WF/PC-2 6187 (WF/PC-2 Cycle 5 Calibration: Earth Flats)

The WF/PC-2 was used to make Earth streak flat calibration images. =
These streak flats will be used to produce flat fields, to map the OTA =
illumination pattern and, in combination with other data, to produce new =
superflats. The observations were completed as planned, and no problems =
were reported.

1.8 Completed WF/PC-2 6189 (WF/PC-2 Cycle 5 Calibration: Internal Monitor =
- Vis Flats)

The WF/PC-2 was used to make internal visual flat calibration =
images. Both photometric and narrow-band filters were used. The =
observations were executed as planned, and no problems were reported.

1.9 Completed FGS 6325 (Monitor the Long-Term Stability for FGS #3 Still)

FGS#3 was used to make observations of standard stars OF957, =
OF957-REF, OF539-REF, OF712-REF, OF756-REF, et. al which are located in =
the star cluster M-35 in order to monitor the long-term internal stability =
of the FGS unit. During this proposal, three parameters, F3YFCPA, =
F3YFCPB, and F3XFCPA, flagged high briefly (less than a minute). These =
events were documented in HSTAR 5369. Otherwise, the observations were =
completed as planned, and no anomalies were noted.

1.10 Completed WF/PC-2 6253 (Pure Parallel Archive Program)

The WF/PC-2 was used to execute a pure parallel program taking =
ultraviolet observations running concurrently with prime science =
observations. The intent is to search for extra-galactic sources with =
flux excesses at 3000 A0 and galactic sources with excesses at 1600 A0. =
The observations were completed as planned, and no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 7
Successful : 7

Scheduled Reacquisitions : 10
Successful : 10

2.2 FHST Updates:

Scheduled : 9
Successful : 9

2.3 Operations Notes:

There were no significant operational problems reported.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Nothing at this time.

/DMH