Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_97/hst_status_04_01_97 Дата изменения: Tue Apr 1 16:00:13 1997 Дата индексирования: Sun Dec 23 10:48:38 2007 Кодировка: Поисковые слова: ultraviolet

HUBBLE SPACE TELESCOPE

DAILY REPORT #1846

PERIOD COVERED: 0000Z (UTC) 03/31/97 - 0000Z (UTC) 04/01/97

Daily Status Report as of 091/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed WF/PC-2 5828 (HST FAR-UV Imaging and Spectra of Jupiter =
- Coordinated with the Galileo UVS)

The WF/PC-2 was used to make far-ultraviolet imaging and =
spectrographic observations of the planet Jupiter's North auroral =
emissions. These observations will be coordinated with the Galileo =
Mission ultraviolet observations. The observations were executed as =
scheduled, and no anomalies were noted.

1.2 Completed STIS/CCD 7067 (STIS CCD Point Source Acquisition =
(STIS10))

The Space Telescope Imaging Spectrograph (CCD) was used to make =
observations of point source GD153. This is to demonstrate ability of =
the STIS FSW to locate an isolated point source, determine the position =
of a spectroscopic slit, and position the target within the slit. The =
observations were executed as scheduled, and no anomalies were noted.

1.3 Completed WF/PC-2 6359 (Core Properties of the Bulges of Spiral =
Galaxies)

The WF/PC-2 was used to make snapshot survey observations of =
spiral galaxy NGC-2339 in order to study its central bulge. The aim is =
to investigate the core properties, correlations with global galactic =
properties, and the frequency of occurrence of multiple and/or =
miscentered nuclei. The observations were completed as scheduled, and no =
anomalies were noted.

1.4 Completed WF/PC-2 6438 (Dust Structure in Backlit Galaxies)

The WF/PC-2 was used to make observations of the backlit galaxy =
AM0500-620 in order to study its dust structure. This effect is produced =
by a pair of overlapping galaxies which offer an unusually direct way to =
measure the extinction within the disk of spiral galaxies. The =
observations were completed as planned, and no problems were reported.

1.5 Completed WF/PC-2 6807 (The Spatial Distribution of Dust =
Extinction Through Spiral Disks)

The WF/PC-2 was used to make observations of the spiral galaxy =
UGC-5041 in order to study the distribution of dust within its spiral =
arms. This is a background, early-type galaxy which is shining light =
through the disk of a foreground spiral. These systems provide an =
excellent opportunity to map with high spatial resolution the dust =
extinction. The observations were completed as scheduled, and no =
anomalies were reported.

1.6 Completed WF/PC-2 6793 (WF/PC-2 Support for the Mars Pathfinder =
Mission)

The WF/PC-2 was used to make observations of the planet Mars. =
This is to support the Pathfinder Mission to Mars. Observations of Mars =
are scheduled near opposition, one month prior to landing, and during the =
landed phase of the Pathfinder Mission. The observations were completed =
as scheduled, and no problems were reported.

1.7 Completed WF/PC-2 6361 (High Resolution Imaging of X-Ray Selected =
AGNs)

The WF/PC-2 was used to make high resolution observations of the =
known, low, red-shifted, x-ray active galactic nucleus (AGN) MS0944.1+1. =
These data will allow a study of the optical properties of an unbiased =
sample of AGN host galaxies. The observations were completed as =
scheduled, and no problems were reported.

1.8 Completed WF/PC-2 6737 (Imaging Reflection Nebulosity in Three =
Post-AGB Objects)

The WF/PC-2 was used to make observations of the reflection nebula =
surrounding the post-AGB object HD56126. The physical mechanism of =
stellar mass loss on the AGB is one of the unsolved problems in stellar =
astrophysics. The observations were completed as scheduled, and no =
anomalies were reported.

1.9 Completed WF/PC-2 7019 (WF/PC-2 SMOV Flat Field Check)

The WF/PC-2 was used to obtain a sequences of Earth streak and =
internal flats to check for changes at the 1% level. The observations =
were completed as scheduled, and no problems were reported

1.10 Completed FGS 6919 (Three Points of Light Calibration)

FGS#3 was used to make a three points of light calibration by =
making observations of standard star UPGREN69. This calibration will be =
done at three different points in FGS#3 using three different filters =
(pupil, clear and neutral density). This will be used to obtain a =
reference transfer function which will be used to deduce the presence of =
secondary stars in multiple star systems. The observations were executed =
as scheduled, and no anomalies were noted.

1.11 Completed WF/PC-2 6902 (WF/PC-2 Cycle 6 Photometric Calibration =
Monitor UV/OPT STD)

The WF/PC-2 was used to make both ultraviolet and optical =
photometric observations of the standard star GRW+70D582 as part of a =
Cycle 6 calibration procedure. These observations were done immediately =
before and after decontamination procedures. The observations were =
completed as planned, and no problems were reported.

1.12 WF/PC-2 6363 (The Environments and Host Galaxies of BL-Lac =
Objects)

Just before this proposal was due to begin, the safemode event =
described in 2.3 occurred.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 5
Successful : 5

Scheduled Reacquisitions : 3
Successful : 3

2.2 FHST Updates:

Scheduled : 12
Successful : 12

2.3 Operations Notes:

At 090/233420Z the solar array position commands were issued (to =
slew from 85 to 16.3 degrees). The solar array rotate command was issued =
at 090/233920Z, and the solar array slew and type 2 slew command were =
issued at 090/233941Z. At 090/234112Z the minus wing failed the SADE =
torque test and the HST entered software sun point. HSTAR 6003 was =
written.

FOC and STIS are safed and nominal. NICMOS remains in boot mode. =
COSTAR is in hold, and WF/PC-2 is in operate mode. Temperatures are =
being monitored in real time.

SADE-2 was being used when the difficulty arose. After several =
patches were made to the FSW, a safemode recovery SPC load, using SADE-1, =
started at 091/071209Z, and normal mode was achieved at 091/073951Z.

Currently, HST operations personnel await the arrival of the =
health and safety load which is to run from 091/1900Z until 092/1800Z, =
when normal science and SMOV operations will resume.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

A meeting on the software sun point entry status is scheduled for =
this morning at 10:00 a.m..

/DMH