Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_00/hst_status_07_14_00 Дата изменения: Fri Jul 14 14:39:07 2000 Дата индексирования: Sun Dec 23 10:15:22 2007 Кодировка: Поисковые слова: supernova remnant

HUBBLE SPACE TELESCOPE

DAILY REPORT #2664

PERIOD COVERED: 0000Z (UTC) 07/13/00 - 0000Z (UTC) 07/14/00

Daily Status Report as of 196/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed Two Sets of STIS/CCD 8437 (Dark Monitor-Part 2 C8)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the darks. The proposal completed nominally.

1.2 Completed Five 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.

1.3 Completed STIS/CCD 8844 (Deep Spatial/Spectral PSF Calibration)

The Space Telescope Imaging Spectrograph (CCD) was used to acquire
a set of deep spectroscopic images of isolated, point source stars for the
purpose of correcting spectroscopic science observations for dispersed
residual scattered light along the slit from the point-like central
object. Using limited observations from the archive, it is suspected that
a dynamic range approaching 10exp7 can be measured from the stellar core to
26" away at the limit of the CCD and aperture edge. The observations
completed with no anomalies reported.

1.4 Completed Four Sets of WF/PC-2 8805 (POMS Test Proposal: WFII
Parallel Archive Proposal Continuation)

The WF/PC-2 was used to perform a generic target version of the
WFPC2 Archival Pure Parallel program. The program will be used to take
parallel images of random areas of the sky, following the recommendations
of the Parallels Working. The proposal completed with no reported problems.

1.5 Completed WF/PC-2 8597 (The Fueling of Active Nuclei: Why are
Active Galaxies Active?)

The WF/PC-2 was used to investigate the accretion onto massive
black holes which is believed to be the energy source for AGN. However,
evidence for black holes in quiescent galaxies has also been reported. Why
are these galaxies inactive? One possibility is that active galaxies are
better at providing fuel to the nuclear region than quiescent
galaxies. Other possible fueling mechanisms such as ``bars-within-bars''
or nuclear spirals cannot be investigated from the ground because they are
relatively small features in the ISM. The observations were completed as
planned.

1.6 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.

1.7 Completed 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.

1.8 Completed STIS/CCD 8850 (Deep CCD/G750M Wavecals)

The Space Telescope Imaging Spectrograph (CCD) was used to obtain
deep wavecals that are needed for the long wavelength setting of G750M. It
has been noticed that wavelength dispersion errors on the order of 1 pixel
in the overlap regions of the long wavelength settings of G750M for GTO and
GO Eta Carina long slit spectra. No deep post-launch wavecals exist for
these wavelengths. The standard GO wavecals are not deep enough to
accurately determine the dispersion relation. There were no reported problems.

1.9 Completed STIS/CCD 8128 (Stalking FLIERs in Planetary Nebualae: a
STIS Study)

The Space Telescope Imaging Spectrograph (CCD) was used to observe
FLIERs, which are enigmatic pairs of small, low-ionization knots located
on opposite sides of the central star of many PNe. Their symmetric
locations, equal, opposite and supersonic Doppler shifts {Mach 3-5}, and
highly enriched N/O ratios suggest that they are peculiar spitballs ejected
recently from the stellar interior. The observations completed nominally.

1.10 Completed STIS/CCD/MA2 8342 (Abundances in Halo Stars and Galactic
Element Formation)

The Space Telescope Imaging Spectrograph (MA1 and CCD) was used to
make observations of star HD221170 as part of a study of the abundances in
halo stars and galactic element formation. The results for the very oldest
galactic stars will also provide an important, and independent, age
determination for the Galaxy and hence constrain cosmological age
estimates. A wavelength calibration image was also taken. The
observations were executed as scheduled, and no anomalies were noted.

1.11 Completed STIS/CCD 8439 (Bias Monitor-Part 2 C8)

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 with no reported problems.

1.12 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.

1.13 Completed WF/PC-2 8110 (Supernova Remnants in a Cloudy
Interstellar Medium)

The WF/PC-2 was used to observe small cloudlets in the interstellar
medium {ISM} that may have a marked effect on the physical structure and
evolution of supernova remnants {SNRs}. These WFPC2 images can be combined
with complementary observations in other wavelength regimes to identify
cloudlets inside remnants, trace SNR shock fronts, determine the physical
parameters of interior cloudlets and compare them to those of the hot
interior, and investigate the evaporation of shocked cloudlets into the hot
cavities of the SNRs. Losses of lock described in HSTAR 7721 and 2.1
occurred during this proposal, probably affecting at least some of the
observations.

1.14 Completed STIS/CCD 7912 (STIS Parallel Archive Proposal - Nearby
Galaxies - Imaging and Spectroscopy)

The Space Telescope Imaging Spectrograph (CCD) was used to make
parallel observations of nearby galaxies. This survey will be useful to
study the star formation histories, chemical evolution, and distances to
these galaxies. These data will be placed immediately into the Hubble Data
Archive. The observations were completed as scheduled, and no problems
were reported.

1.15 Completed Two Sets of 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. Losses of lock described in HSTAR 7721 and 2.1 occurred during
both iterations of this proposal, probably affecting at least some of the
observations. Otherwise, the observations completed with no further
anomalous activity.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions: 7
Successful: 7
Scheduled Re-acquisitions: 9
Successful: 9

According to HSTAR 7721, there were at least two loss of lock on
FGS-3 at approximately 196/022038Z and at approximately
196/022330. Uncertainty is caused by the fact that a zone of exclusion was
involved. Proposals described in 1.13 and 1.15 were affected.

The acquisition at 196/060248Z defaulted to fine lock backup on
FGS-1 only, possibly affecting four proposals which will appear in the next
report: WF/PC-2 8609, STIS 8870, STIS 8808, and STIS 8437. HSTAR 7722 was
written.

2.2 FHST Updates:

Scheduled: 16
Successful: 16

2.3 Operations Notes:

Using ROP SR-1A, the SSR EDAC error counter was cleared at 195/2310Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW