Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_00/hst_status_08_23_00 Дата изменения: Wed Aug 23 14:41:19 2000 Дата индексирования: Sun Dec 23 10:16:13 2007 Кодировка: Поисковые слова: tail

HUBBLE SPACE TELESCOPE

DAILY REPORT #2692

PERIOD COVERED: 0000Z (UTC) 08/22/00 - 0000Z (UTC) 08/23/00

Daily Status Report as of 236/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 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.

1.2 Completed Three 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.

1.3 Completed WF/PC-2 8634 (Atmospheric Variability on Uranus and Neptune)

The WF/PC-2 was used to obtain snapshot observations of Uranus and
Neptune to monitor changes in their atmospheres on time scales of months to
years. Uranus is rapidly approaching equinox in 2007, with another 4
degrees of latitude in the northern hemisphere becoming visible every
year. Recent HST images during this unique epoch have revealed: {i}
strongly wavelength-dependent latitudinal structure, {ii} the presence of
numerous visible-wavelength cloud features in the northern hemisphere, and,
{iii} in the near-IR, discrete features northward of 25degrees N that have
the highest contrast ever seen for a Uranian cloud. Long-term ground-
based observations show seasonal brightness changes whose origins are not
well understood. Recent IR images of Neptune obtained using adaptive
optics on the Keck Telescope indicate that a new "Bright Companion" type of
feature has recently appeared in the southern hemisphere. Snapshot
observations of these two dynamic planets can supply context in which to
discern the nature of long-term changes in their latitudinal atmospheric
bands and to track the appearance, movement, and disappearance of discrete
albedo features. There were no reported problems.

1.4 Completed WF/PC-2 8716 (Search For Sub-Stellar Companions To Young
Brown Dwarfs In The Chamaeleon I Dark Cloud)

The WF/PC-2 was used to observe twelve very low-mass dwarfs in the
Chamaeleon I dark cloud, a site of on-going star formation, all showing
H-alpha emission with spectral types from M6 to M8. We propose to observe
these young, very low-mass dwarfs in order to search for close, faint
companions. There were no reported problems.

1.5 Completed Two Sets of WF/PC-2/STIS/CCD 8414 (STIS Sparse Field CTE
test {Cycle 8))

Both the WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD)
were used to conduct CTE measurements using the "sparse field test", along
both the serial and parallel axes. This program needs special commanding
to provide {a} off-center MSM positionings of some slits, and {b} the
ability to read out with any amplifier {A, B, C, or D}. All exposures are
internals. The observations were completed as planned, and no anomalies
were reported.

1.6 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.

1.7 Completed WF/PC-2 8709 (UV Light from Old Stellar Populations: A
Census of UV Bright Stars in `Blue Tail' Globular Clusters)

The WF/PC-2 was used to make observations of UV-bright stars in
Galactic Globular Clusters {GGCs}. These will complement data obtained
during Cycles 5 and 6. The goals are multifold: {a} to observe the
morphology in the faint blue tails {BTs} of GGC horizontal branches {HBs};
{b} to explore the relationship between the HB mass distribution in BT
clusters to the clusters' structural and dynamical properties; {c} to gain
further samples of Blue Straggler Stars and the long-sought Cataclysmic
Variables in GGC cores; and {d} to obtain relatively large samples of post
main sequence stars. The observations completed with no reported problems.

1.8 Completed Two 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.

1.9 Completed STIS/CCD 8480 9Long Slit Spectroscopy Of The Extended
Emission-Line Regions In Seyfert 2 Galaxies)

The Space Telescope Imaging Spectrograph (CCD) was used to perform
long-slit low-dispersion spectra of the Seyfert 2 galaxy Mrk 3 in order to
obtain the wide range of spatially-resolved UV and visible emission lines
needed to determine density gradients in the narrow- line region {NLR}, to
determine the intrinsic reddening in the NLR, to study the kinematics of
the NLR, and to verify the existence of a hidden broad line region {BLR}
and luminous continuum source. The observations completed with no reported
anomalies.

1.10 Completed Three 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.

1.11 Completed WF/PC-2 8544 (POMS Test Proposal: WFII Backup Parallel
Archive Proposal II)

The WF/PC-2 was used to execute a POMS test proposal that was
designed to simulate scientific plans. No problems were encountered.

1.12 Completed WF/PC-2 8233 (UV Imaging of Optical Jets: A New Window
on the Physics of Jets)

The WF/PC-2 was used to observe extragalactic radio jets which are
highly collimated beams of high energy particles and magnetic fields
issuing forth at relativistic speeds from sub-parsec scale regions,
extending hundreds of kpc through interstellar and intergalactic
space. They are unique in their scope, power, and size. The jets affect
their host galaxies and environments, through kinetic energy output and
through deposition of cosmic rays and magnetic fields into interstellar and
intergalactic space. Despite years of study, fundamental jet parameters
such as the magnetic field strength, particle density, jet configuration,
bulk Lorentz factor, and the nature of particle acceleration in the flow
remain unknown. The observations completed with no anomalous activity.

1.13 Completed WF/PC-2 8816 (Cycle 9 UV Earthflats)

The WF/PC-2 was used to obtain sequences of earth streak flats to
improve the quality of pipeline flat fields for the WFPC2 UV filter set and
in order to monitor flat field stability. There were no reported problems.

1.14 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.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 8
Successful: 8

Scheduled Re-acquisitions: 9
Successful: 9

2.2 FHST Updates:
Scheduled: 19
Successful: 19

2.3 Operations Notes:


The flight operations team is conduction operations during day and
swing shift from the Science Institute through day 237.

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

SI C&DH errors were reset at 235/2027Z per ROP NS-5.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW