Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_98/hst_status_09_09_98 Дата изменения: Wed Sep 9 15:30:25 1998 Дата индексирования: Sun Dec 23 10:57:51 2007 Кодировка: Поисковые слова: m 31

HUBBLE SPACE TELESCOPE

DAILY REPORT #2204

PERIOD COVERED: 0000Z (UTC) 09/08/98 - 0000Z (UTC) 09/09/98

Daily Status Report as of 252/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Two 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 Two Sets of 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.

1.3 Completed Two Sets 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 Two Sets of NIC/1/2/3 7899 (An IR Search For faint
Companions to Pleiades Very Low-Mass Stars and Brown Dwarfs)

The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of HHJ2. This is part of a infrared campaign to search
for faint companions to Pleiades very low-mass stars and brown dwarfs. The
Pleiades has been the best site for brown dwarf {BD} searches, with half of
the presently "confirmed" BDs being Pleiades members. The observations
were executed as scheduled, and no anomalies were noted.

1.5 Completed Two 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 take in parallel with the prime science
observations. The observations were completed as planned, and no problems
were reported.

1.6 Completed WF/PC-2 6619 (High Resolution Images of QSO Lyman Alpha
Absorbing Galaxies)

The WF/PC-2 was used to make several images of galaxy field (Field
1642) in order to obtain high resolution observations of the Lyman Alpha
absorbing galaxies within this field-of-view. The purpose is to directly
identify the objects responsible for low and intermediate redshift QSO
Lyman-Alpha systems. 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 WF/PC-2 7627 (WF/PC-2 Cycle 7 Astrometric Monitor)

The WF/PC-2 was used to make observations of the large globular
Cluster Omega Cen as part of a Cycle 7 astrometric monitor and calibration
of the CCDs. This program will verify accuracy and stability of geometric
transformation and relative astrometry solution. The observations were
executed as scheduled and no anomalies were noted.

1.9 Completed STIS/CCD/MA1/MA2 7269 (The 1997/98 Eclipse of VV Cephei)

The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was used
to make ultraviolet spectrographic observations of the long-period
eclipsing binary star HD208816 (a.k.a., VV-Cephei). This eclipse will
provide an unprecedented opportunity to obtain spatially resolved
information about the density, ionization and velocity structure in the
outer atmosphere of the M supergiant primary. A wave length calibration
observation was also taken. The observations were completed as scheduled,
and no anomalies were noted.

1.10 Completed NIC/1/2 8077 (NICMOS Linearity Calibration)

The Near Infrared Camera (Cameras One and Two) was used to make
linearity calibration observations. The purpose of this proposal is to
obtain on-orbit NICMOS linearity correction data which sufficiently samples
in the linear region of the response curve. The observations were
completed as scheduled, and no anomalies were noted.

1.11 Completed NIC/1/2/3 7826 (Near-IR Photometry of M-31's Metal-Rich
Globular Clusters)

The Near Infrared Camera (Cameras One, Two and Three) were used to
make observations of the metal-rich globular cluster G177 in galaxy M-31.
The high metallicities of the program clusters will make these observations
of particular interest for furthering our understanding of the evolution of
metal rich stars, and for the population synthesis models meant to study
the stellar content of distant, unresolvable bulges and elliptical
galaxies. The observations were executed as scheduled, and no anomalies
were noted.

1.12 Completed STIS/CCD 7635 (STIS CCD Hot Pixel Annealing)

The Space Telescope Imaging Spectrograph (CCD) was used to test the
hot pixel annealing procedure. The effectiveness of the CCD hot pixel
annealing process is assessed by measuring the dark current behavior before
and after annealing and by searching for any window contamination effects.
The observations were completed as planned, and no problems were reported.

1.13 Completed NIC/2 6767 (A Search for Brown Dwarfs and Luminous Young
Planets in the Hyades)

The Near Infrared Camera (Camera Two) was used to make observations
of the brown dwarf star RHY115 which is located in the Hyades Cluster.
This is to search for substellar companions orbiting low-mass Hyades M
class dwarf stars. Differential imaging was used using methane and water
band (on/off) filter pairs. The observations were completed as planned,
and no problems were reported.

1.14 Completed FGS 7487 (Orbits of Pre-Main Sequence Binaries)

The Fine Guidance Sensors were used to make astrometric observations
of the pre-main-sequence, binary star ZZ-Tau in order to determine its
orbital elements. This is important because there are still no low mass
young stars with reliably known masses. The observations were executed as
scheduled, and no anomalies were noted.

1.15 Completed WF/PC-2 8061 (POMS Test Proposal: WF-II Backup Parallel
Archive Proposal)

This is a POMS test proposal designed to simulate scientific plans.
The proposal was executed as planned, and no anomalies were reported.

1.16 Completed NIC/2 7227 (A Search for Low Mass/Sub-Luminous Companions
to M-Stars)

The Near Infrared Camera (Camera Two) was used to make a search for
low mass/sub-luminous companions to low mass M class stars. Knowledge of
stellar and sub-stellar masses and luminosities at and below the ~0.08
M{sun} H-burning limit is of fundamental importance. A dark calibration
image was also taken. The observations were completed as planned, and no
problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 8
Successful : 8

Scheduled Reacquisitions : 4
Successful : 4

2.2 FHST Updates:

Scheduled : 16
Successful : 16

2.3 Operations Notes:

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

The Battery #6 Capacity Check was started at 251/2155Z as directed
by an operations request. Discharge began at 251/2224Z. It is anticipated
that discharge will terminate in the interval from 252/1330Z to 252/1630Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH