Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_98/hst_status_06_04_98 Дата изменения: Thu Jun 4 15:30:07 1998 Дата индексирования: Sun Dec 23 10:56:14 2007 Кодировка: Поисковые слова: rings

HUBBLE SPACE TELESCOPE

DAILY REPORT #2137

PERIOD COVERED: 0000Z (UTC) 06/03/98 - 0000Z (UTC) 06/04/98

Daily Status Report as of 155/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Three Sets of WF/PC-2 7909 (POMS Test Proposal: WF II
Parallel Archive Proposal)

The WF/PC-2 was used to make parallel observations as part of the
POMS test proposal. This test proposal is designed to simulate scientific
plans. The observations were completed as planned, and no problems were
reported.

1.2 Completed Six Sets of STIS/CCD 7908 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal)

The Space Telescope Imaging Spectrograph (CCD) was used to make
calibration observations as part of the POMS Test Proposal. This was a
STIS non-scripted parallel proposal. The observations were completed as
planned, and no problems were reported.

1.3 Completed Two Sets of WF/PC-2 7712 (WF/PC-2 Cycle 7 Supplemental
Darks pt2/3)

The WF/PC-2 was used to make a series of Cycle 7 supplemental
calibration darks. 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 executed as scheduled, and no
anomalies were noted.

1.4 Completed STIS/CCD 7926 (CCD Dark and Bias Monitor -- Continued)

The Space Telescope Imaging Spectrograph (CCD) was used to make
several dark and bias calibration observations. This is 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. These observations will also 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.

1.5 Completed NIC/1/2 7861 (A Search for Extrasolar Giant Planets in the
Nearby TW Hya Association)

The Near Infrared Camera (Cameras One and Two) was used to search
for extrasolar giant planets on the nearby star CD-298887 (a.k.a., TW Hya).
One of the primary goals of NASA's mission is the identification of formed
and nascent planetary systems. The observations were executed as
scheduled, and no anomalies were noted.

1.6 Completed WF/PC-2 7590 (Cosmological Parameters Omega and Lambda
From High-Redshift Type IA Supernovae)

The WF/PC-2 was used to make observations of type 1A supernova
11H0.9Z1 in order to study its redshift. The HST was used to make direct
measurements of the cosmological parameters Omega, Lambda, and curvature
using Type 1A supernovae as a calibrated "standard candle". The
observations were executed as scheduled, and no anomalies were noted.

1.7 Completed Two Sets of NIC/2/3 7907 (NICMOS Pure Parallel Winter 97-98)

The Near Infrared Camera (Cameras Two and Three) was used to make
pure parallel spectrographic observations of sky regions when another
instrument is prime. The observations were completed as planned, and no
anomalies were reported.

1.8 Completed NIC/1/2/3 7893 (The Two Types of BL Lac Objects: Extrema
of Jet Physics)

The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the BL Lac object MS0607+710. These observations will
build on the WF/PC-2 survey of a well-defined sample of 97 BL Lac objects,
for which host galaxies were detected in 90 simulations predict ~100
provide essential constraints on galaxy properties --- luminosity, size,
morphology, and color --- including an unprecedented ensemble of host
galaxy color profiles at subarcsecond spatial resolution. The observations
were executed as scheduled, and no anomalies were noted.

1.9 Completed NIC/1/2/3 7889 (Study of Compact Binaries in the Extreme
Globular Cluster Terzan5)

The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of compact binary stars in the globular cluster Terzan5.
Stellar collisions and interactions in dense star clusters are fundamental
to the evolution of globular clusters and galactic nuclei. The
observations were completed as planned, and no anomalies were reported.

1.10 Completed Two Sets of STIS/CCD 7911 (STIS Galactic Plane Pure
Parallel Program)

The Space Telescope Imaging Spectrograph (CCD) was used to make low
galactic latitude survey observations in parallel with the prime science
observations. Short exposures with the 50CCD imaging mode will provide the
wavelength zero-point calibration. These data will be placed immediately
into the Hubble Data Archive. The observations were executed as scheduled,
and no anomalies were noted.

1.11 Completed NIC/2 7244 (Imaging of the Neptune Ring)

The Near Infrared Camera (Camera Two) was used to make images of the
planet Neptune's rings. The arcs in the Neptune ring have not been seen
since Voyager 2 imaged them in 1989. NICMOS images made within a methane
band, which suppress the scattered light from Neptune, may reveal the ring
arcs, the brightest components of the Neptune ring system. The
observations were executed as scheduled, and no anomalies were noted.

1.12 Completed NIC/1/2/3 7226 (Search for Massive Jupiters)

The Near Infrared Camera (Cameras One, Two, and Three) was used to
make a corographic search for massive planets around the nearby, young main
sequence star GL577. Because of the extreme youth of this object, any
low-mass brown dwarf and planetary companions will still be in a higher
luminosity phase and thus easily detectable. A dark calibration image was
also taken. The observations were executed as scheduled, and no anomalies
were noted.

1.13 Completed WF/PC-2 6776 (A Comparative HST Imaging Study of Radio
Galaxies and Hosts)

A clear understanding of the nature of the host galaxies of
radio-quiet quasars, radio-loud quasars and radio galaxies is of central
importance in any attempt to unify and relate the three main classes of
powerful active galaxies. Existing HST studies of quasar hosts, whilst
producing many interesting new results, have yielded surprisingly little
hard information on the properties of the hosts themselves. This imaging
study of PKS2355-08 using the WF/PC-2 will remedy this situation by
undertaking redder, line-free observations of our three matched AGN
samples. The proposal completed with no reported problems.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 8
Successful : 7

Per HSTAR 6503, the full maneuver FHST updates at 155/0702Z and at
155/070450Z both failed and the subsequent guide star acquisition failed at
155/0757Z. Two proposals, NICMOS 7871 and STIS 7908, both occuring during
the time of tomorrow's report were affected. An ARU/PRT was uplinked at
155/0832Z and the following re-acquisition at 155/0905Z was successful.

Scheduled Reacquisitions : 7
Successful : 7

2.2 FHST Updates:

Scheduled : 19
Successful : 17

See comments above under "Guide Star Acquisitions".

2.3 Operations Notes:

The GRGT (Guam Remote Ground Terminal) test was successfully
completed at 154/2023Z as directed by an operations request.

The second NICMOS Camera Three Campaign began with the secondary
mirror move that was required to place NIC Camera Three in focus for the
campaign. The secondary mirror was moved 16.8 microns away from the
primary mirror at 155/0101Z.

Using ROP SR-1, the SSR EDAC error counter was cleared three times.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH