Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_00/hst_status_09_14_00 Дата изменения: Thu Sep 14 14:36:59 2000 Дата индексирования: Sun Dec 23 10:16:40 2007 Кодировка: Поисковые слова: arp 220

HUBBLE SPACE TELESCOPE

DAILY REPORT #2707

PERIOD COVERED: 0000Z (UTC) 09/13/00 - 0000Z (UTC) 09/14/00

Daily Status Report as of 258/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed WF/PC-2 8601 (A Snapshot Survey of Probable Nearby Galaxies)

The WF/PC-2 was used to continue the very successful snapshot
survey in order to use the high spatial resolution of HST to determine
whether selected galaxies are nearby on the basis of resolution into stars,
and the magnitudes and colors of the brightest stars. There were no
reported problems.

1.2 Completed Five Sets of STIS/CCD 8808 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation III)

The Space Telescope Imaging Spectrograph (CCD) was used to make
non-scripted, parallel observations as part of a POMS test proposal. The
observations completed with no anomalous activity.

1.3 Completed Two Sets of WF/PC-2 8826 (Cycle 9 Supplemental Darks pt 1)

The WF/PC-2 was used to perform a T dark calibration program that
obtains three dark frames every day in order to provide data for monitoring
and characterizing the evolution of hot pixels. There were no reported
anomalies.

1.4 Completed STIS/CCD 8838 (Bias Monitor - Part 1)

The Space Telescope Imaging Spectrograph (CCD) was used 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 track the evolution of hot
columns. The proposal completed nominally.

1.5 Completed WF/PC-2 8701 (Multiplicity among Very-Low Mass Stars and
Brown Dwarfs in Alpha Persei and the Pleiades)

The WF/PC-2 was used to observe open clusters which provide
excellent hunting grounds for brown dwarf {BD} searches. The AlphaPer and
Pleiades clusters are young, nearby and have low extinction. They are
considered to be the best-suited places to study the Substellar Mass. A
dozen of cool faint AlphaPer and Pleiades members have been confirmed as
``bona-fide'' BDs with the lithium test. By comparison with those, about
60 very good cluster BD candiates are currently known. The Pleiades SMF
obtained using the most recent deep large CCD surveys indicates that BDs
are quite numerous but do not make a significant contribution to the total
cluster mass. The observations completed with no reported problems.

1.6 Completed STIS/CCD 8870 (POMS Test Proposal: STIS Non-Scripted
Parallel Proposal Continuation IV)

The Space Telescope Imaging Spectrograph (CCD) was used to make
non-scripted, parallel observations as part of a POMS test proposal. The
observations completed with no anomalous activity.

1.7 Completed Two Sets of STIS/CCD 8837 (CCD Dark Monitor-Part 1)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the darks. The proposal completed with no reported problems.

1.8 Completed STIS/CCD 8631 (Bright Quasar Close Lensing Search II)

The Space Telescope Imaging Spectrograph (CCD) was used to expand
the Cycle 8 second generation HST snapshot survey of bright quasars,
optimized to find lenses with component image separations < 1". The
observations completed nominally.

1.9 Completed STIS/CCD 8318 (Probing the Evolution of Massive Stars:
Ejecta Ring Nebulae Abundances and Dynamics)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the evolved massive stars within nebula HD269929. This
study will allow us to understand at which evolutionary stage the major
mass loss occurs in the transition from an O to a WR class star. A
wavelength calibration image was also taken. The observations were
completed as planned, and no anomalies were reported.

1.10 Completed WF/PC-2 8059 (POMS Test Proposal: Targeted Parallel
Archive Proposal)

The WF/PC-2 was used to observe the parallel opportunities
available 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. Narrow-band images in F656N can be used both to identify
young stars via their emission lines, and to map the gas distribution in
star-forming regions. The observations completed nominally.

1.11 Completed WF/PC-2/STIS/CCD/MA1/MA2 8207 (The Ofpe/WN Stars In M33:
Understanding Wolf-Rayet Star Formation In Different Environments)

Both WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD, MA1
and MA2) were used to make observations of Wolf-Rayet stars in the galaxy
M-33. WF/PC-2 imaging parallel to the primary spectroscopy in UBV and FUV
filters will substantially extend our study of the hot massive star
population and populous stellar clusters in this galaxy. A wavelength
calibration image was also taken. The observations were completed as
planned, and no anomalies were reported.

1.12 Completed WF/PC-2 8121 (Proper Motions and Variability of HH
Objects Near the Orion Nebula)

The WF/PC-2 was used to observe the Orion nebula, which possesses
at least three systems of HH objects, each with very different
characteristics. No other source shows such a variety of outflow
phenomena, and the proposers seek to understand why this is so. The
proposal completed with no reported problems.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 6
Successful: 6

Scheduled Re-acquisitions: 9
Successful: 9

2.2 FHST Updates:
Scheduled: 16
Successful: 16

2.3 Operations Notes:

Using ROP SR-1A, the SSR EDAC error counter was cleared twice.

The STIS MCE-2 reset at 257/095227Z while the low voltage was on
and outside any SAA interval. The STIS flight software error counter was
cleared at 257/1004Z per ROP NS-12. MAMA-2 will be recovered via normal
SMS commanding.

As described in HSTAR 7850, there was an FGS-2 bit flip when
QF2SSLEX and QSTEPEXC were set at 258/014849Z and 258/014854Z
respectively. FGS_2 was not performing an acquisition at the time, but the
vehicle was in an SAA level 1 contour.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW