Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_99/hst_status_08_06_99 Дата изменения: Fri Aug 6 14:48:48 1999 Дата индексирования: Sun Dec 23 11:03:49 2007 Кодировка: Поисковые слова: m 31

HUBBLE SPACE TELESCOPE

DAILY REPORT #2430

PERIOD COVERED: 0000Z (UTC) 08/05/99 - 0000Z (UTC) 08/06/99

Daily Status Report as of 218/0000Z

ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Three 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. The
observations were completed as planned, and no problems were reported.

1.2 Completed Three Sets of STIS/CCD 8202 (Bright Quasar Close Lensing
Search)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of HCLQ2208-1, HCLQ2215-3, HCLQ1645+2 and HCLQ0521-2 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.

1.3 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.

1.4 Completed WF/PC-2 8195 (The Stellar Halo and the Metallicity
Distribution Function in the Giant Elliptical NGC 5128)

The WF/PC-2 was used to make observations of the giant elliptical galaxy
NGC-5128 in order to study its stellar halo and the metallicity distribution
function. Because this galaxy is 2 magnitudes closer than any other giant
elliptical galaxy, it gives us a unique opportunity to study the enrichment
history at a level of detail that is impossible for any other such galaxy. The
observations were completed as planned, and no problems were reported.

1.5 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.

1.6 Completed Two Sets of STIS/CCD 8406 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation V)

The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude observations taken in parallel with the prime science
observations as part of a POMS proposal. This is a STIS non-scripted parallel
Condition V proposal. The observations were completed as scheduled, and no
anomalies were reported.

1.7 Completed WF/PC-2 8338 (The Evolution of the Host Galaxies of Powerful
Radio Sources)

The WF/PC-2 was used to make observations of the host galaxy of the
powerful radio source known as MRC1238-23. A combined data set of radio
galaxies and quasars will allow powerful tests of the relationship between
radio galaxies and quasars and the evolution of the host galaxies of powerful
radio sources over a wide range of look-back times. The observations were
executed as scheduled, and no anomalies were noted.

1.8 Completed WF/PC-2 8444 (WF/PC-2 CYCLE-8 Internal Monitor)

The WF/PC-2 was used to make a bias, and an internal flat, observation
as part of a Cycle-8 monitoring program to monitor the health of the cameras.
A variety of internal exposures are obtained in order to provide a monitor of
the integrity of the CCD camera electronics in both bays {gain 7 and gain 15},
a test for quantum efficiency in the CCDs, and a monitor for possible buildup
of contaminants on the CCD windows. The observations were executed as
scheduled, and no anomalies were noted.

1.9 Completed STIS/CCD/MA1 7289 (Spatially-Resolved FUV Spectra of the
Primary Shock in the Cygnus Loop)

The Space Telescope Imaging spectrograph (CCDand MA1) was used to make
far-ultraviolet spectra of the Cygnus Loop to determine the ionization
structure behind the non-radiative, primary shock front on the northeastern
edge of the Cygnus Loop supernova remnant. A wavelength calibration image was
also taken. The observations were completed as planned, and no problems were
reported.

1.10 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.

1.11 Completed STIS/MA2 8430 (STIS MAMA Dipsersion Solution Check)

The Space Telescope Imaging Spectrograph (MA2) was used to perform a
wavelength dispersion observation which is determined on a yearly basis {2x in
Cycle 8} as part of a long-term monitoring program. The observations were
completed as planned, and no anomalies were reported.

1.12 Completed STIS/CCD/MA1 7481 (The Wind-momentum Luminosity Relationship
for M31 and M33 B-supergiants)

The Space Telescope Imaging Spectrograph (CCD and MA1) was used to make
observations of the B class supergiant star M-31 B-133 which is locate in the
M-31 galaxy. The purpose of these observations is to acquire STIS
low-resolution ultraviolet spectra of early B-supergiants in galaxies M31 and
M33 to determine the terminal velocities of their stellar winds. A wavelength
calibration image was also taken. The observations were completed as planned,
and no anomalies were reported.

1.13 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.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 8
Successful : 8

Scheduled Reacquisitions : 8
Successful : 8

2.2 FHST Updates:

Scheduled : 21
Successful : 21

2.3 Operations Notes:

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

A TTR was written for a two-minute, 58-second period at 217/0529Z during
which ODMs could not be sent. Another TTR described mode 1 change failures at
217/211337Z and at 217/212305Z.

The WF/PC-2 microprocessor was dumped at 217/1105Z as directed by ROP
NS-4.

The STIS MCE-2 reset at 218/050330Z while outside the bounds of an SAA
interval and while the low voltage was on. The STIS flight software error
counter was reset at 218/0633Z, using ROP NS-12. MAMA-2 will be recovered at
219/1147Z via normal SMS commanding.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH