Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_98/hst_status_11_19_98 Дата изменения: Thu Nov 19 15:28:50 1998 Дата индексирования: Sun Dec 23 10:59:11 2007 Кодировка: Поисковые слова: meteor shower

HUBBLE SPACE TELESCOPE

DAILY REPORT #2254

PERIOD COVERED: 0000Z (UTC) 11/18/98 - 0000Z (UTC) 11/19/98

Daily Status Report as of 323/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed STIS/CCD 8086 (Leonid STIS proposal)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of quasar PKS2200-23 during the Leonid meteor shower (HST
Leonid-avoidance pointing) to identify high redshift galaxies associated
with Lyman-alpha and metal absorption systems in the quasar spectrum. Our
key aim is to achieve the direct optical identification of high redshift
galaxies which produce absorption against the background QSO. The
observations were completed as scheduled, and no anomalies were noted.

1.2 Completed Two Sets of NIC/1/2/3 7961 (Flats: Warming Up)

The Near Infrared Camera (Cameras One, Two and Three) was used to
monitor the flat fields during the interval between the end of science
observations and the exhaustion of cryogen and subsequent warming of the
dewar to > 100K. These flats will provide a monitor for particulate
comtamination and detector lateral position {from the coronagraphic spot
and FDA vignetting}. The proposal completed with no reported problems.

1.3 Completed WF/PC-2 8087 (Leonid WF/PC-2 proposal)

The WF/PC-2 was used to make observations during the Leonid meteor
shower. This is a special pure-parallel service observation proposal which
will execute during the HST Leonid-avoidance pointing. A deep WF/PC-2
image was taken over 6 orbits {in parallel with a STIS pointed
observation}. Since HST was pointed toward the anti-Earth-vector, the
image will be especially valuable in searching for slow-moving Kuiper belt
objects. It will also be useful for high-redshift galaxy studies. The
observations were completed as planned, and no anomalies were noted.

1.4 Completed Eight Sets of NIC/1/2/3 7963 (Darks: Warming Up)

The Near Infrared Camera (Cameras One, Two and Three) was used to
monitor the detector dark current during the interval between the end of
science observations and the exhaustion of cryogen and subsequent warming
of the dewar to > 100K. The observations were completed as planned, and no
anomalies were noted.

1.5 Completed STIS/CCD 7948 (CCD Dark and Bias Monitor -- Cont. to Dec. 98)

The Space Telescope Imaging Spectrograph (CCD) was used to measure
CCD dark current and bias rates for the two supported amplifier settings
{GAIN=1 and GAIN=4} in order to gather data for making superdarks and
superbiases. The data will be used to track the growth of hot pixels on
the CCD in general and within the various target acquisition apertures
specifically. The observations were executed as scheduled, and no
anomalies were noted.

1.6 Completed Two Sets of WF/PC-2 7713 (WF/P-2 Cycle 7 Supplemental
Darks pt3/3)

The WF/PC-2 was used to make supplemental dark calibration images.
This dark calibration program obtains 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 anomalies were noted.

1.7 Completed NIC/1/2/3 8088 (Cosmological Parameters Omega and Lambda
from High-Z Type Ia Supernovae - DD)

The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of a high-Z supernova in order to determine the
cosmological parameters Omega and Lamda. The observations were executed as
scheduled, and no anomalies were noted.

1.8 Completed WF/PC-2 7466 (From Globular Clusters to Tidal Dwarfs:
Structure Formation in Tidal Tails.)

The WF/PC-2 was used to make observations of the globular clusters
(et al.) within the tidal tail of galactic merger NGC-7252. By modeling
these systems with N--body hydrodynamic codes, can we identify the physical
circumstances and formation histories which can produce tidal dwarfs, star
clusters, and other structures in tidal tails. The observations were
completed as planned, and no anomalies were reported.

1.9 Completed NIC/1/2/3 6482 (Weak Lensing in the Field of Luminous Quasars)

The Near Infrared Camera (Cameras One, Two, and Three) was used to
observe the relatively bright QSO PKS0135-24 which has long been suspected
to be gravitationally magnified. We have found along the line of sight
towards some of them a coherent shear pattern of faint distant galaxies.
Moreover there appear to be overdensities of galaxies concentric with the
shear patterns which are probably responsible for the weak lensing effect
and the QSO magnifications. The observations completed as planned, with no
reported anomalies.

1.10 Completed Five Sets of STIS/CCD 8062 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation)

The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude observations taken in parallel with the prime science
observations. The observations were completed as planned, and no problems
were reported.

2.0 FLIGHT OPERATIONS SUMMARY

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 4
Successful : 4

Scheduled Reacquisitions : 11
Successful : 11

2.2 FHST Updates:

Scheduled : 10
Successful : 10

2.3 Operations Notes:

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

The PSEA was re-configured to not close the aperture door (upon
entry into hardware sunpoint) at 322/1728Z, the pre-Leonid Shower state.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH