Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_98/hst_status_04_15_98 Дата изменения: Wed Apr 15 15:20:59 1998 Дата индексирования: Sun Dec 23 10:55:16 2007 Кодировка: Поисковые слова: ultraviolet

HUBBLE SPACE TELESCOPE

DAILY REPORT #2102

PERIOD COVERED: 0000Z (UTC) 04/14/98 - 0000Z (UTC) 04/15/98

Daily Status Report as of 105/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed STIS/CCD/NIC/3/WF/PC-2 7355 (Continuous Ultraviolet
Monitoring of NGC 3516)

The Space Telescope Imaging Spectrograph (CCD), the Near Infrared
Camera (Camera 3), and the WF/PC-2 were used to make continuous ultraviolet
observations of galaxy NGC-3516. Recent intensive IUE monitoring of NGC
4151 and other AGN reveal rapid aperiodic variations down to the shortest
time scales yet probed {~80 min}, strongly correlated throughout the UV and
X-ray with no detectable interband lag. A wavelength calibration image was
also taken. As described in 2.1, two of the re-acquisitions for this
proposal experienced at least four losses of lock and ultimately failed,
affecting four NICMOS observations, eight STIS observations, and four
WF/PC-2 observations. Otherwise, the observations were completed as
planned, and no anomalies were reported.

1.2 Completed WF/PC-2 7712 (WF/PC-2 Cycle 7 Supplemental Darks pt2/3)

The WF/PC-2 was used to make a series of Cycle 7 supplemental
calibration darks. This dark calibration program obtains three dark frames
every day to provide data for monitoring and characterizing the evolution
of hot pixels. The observations were executed as scheduled, and no
anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 4
Successful : 4

Scheduled Reacquisitions : 5
Successful : 3

As documented in HSTAR 6436, the re-acquisitions at 104/2225Z and at
104/2355Z failed after at least four losses of lock. The proposal outlined
in 1.1 was affected.

2.2 FHST Updates:

Scheduled : 2
Successful : 2

2.3 Operations Notes:

The SSR correctable EDAC counts were cleared five times, per ROP SR-1.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH