Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_97/hst_status_10_22_97 Дата изменения: Wed Oct 22 14:42:38 1997 Дата индексирования: Sun Dec 23 10:52:40 2007 Кодировка: Поисковые слова: asteroid

HUBBLE SPACE TELESCOPE

DAILY REPORT #1988

PERIOD COVERED: 0000Z (UTC) 10/21/97 - 0000Z (UTC) 10/22/97

Daily Status Report as of 295/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed STIS/CCD 7802 (Daily Darks to Update Acquisition Bad Pixel
Table)

The Space Telescope Imaging Spectrograph (CCD) was used to make
calibration observations to obtain daily darks to update the acquisition
bad pixel table. These daily darks are intended to identify hot pixels for
update to the acquisition on-board FSW hot pixel table. Daily hot pixel
lists can also be used for science data analysis. The observations were
executed as scheduled, and no anomalies were noted.

1.2 Completed Four Sets of NIC/1/2/3 7789 (MULTIACCUM Dark
Characterization of Pedestal)

The Near Infrared Camera (Cameras One, Two, and Three) was used to
take a series of dark images to characterize the pedestal problem fix which
was installed in NICMOS flight software version 4.08. The observations
were completed as planned with no reported anomalies.

1.3 Completed WF/PC-2 7625 (WF/PC-2 Cycle 7 Earth Flats)

The WF/PC-2 was used to make a series of Earth flat calibration
images. These flat fields will allow mapping of the OTA illumination
pattern and will be used in conjunction with previous internal and external
flats to generate new pipeline superflats. The observations were completed
as planned, and no anomalies were reported.

1.4 Completed Three Sets of WF/PC-2 7621 (WF/PC-2 Cycle 7 Supplemental
Darks PT1/3)

The WF/PC-2 was used to make supplemental dark calibration images.
This set of calibrations is intended to obtain 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.

1.5 Completed Two Sets of NIC/1/2/3 7789 (MULTIACCUM Dark
Characterization of Pedestal)

The Near Infrared Camera (Cameras One, Two, and Three) was used to
take a series of dark images to characterize the pedestal problem fix which
was installed in NICMOS flight software version 4.08. The observations
were completed as planned with no reported anomalies.

1.6 Completed NIC/1/2 7264 (High Redshift Reflection Nebulae)

The Near Infrared Camera (Cameras One and Two) was used to examine
the spatially extended K band light from high redshift radio galaxy
GEN53W091 that is not being dominated by stars. This object is a giant
reflection nebulae rather than "galaxy". The observations will allow us to
{I} characterize the morphology of the reflection nebulae and the
associated polarization field, {ii} infer the distribution of the dust (e.g
wind vs. dust halo) and some of the properties of the dust, {iii} place
constraints on the underlying stellar population of the host object and
{iv} investigate the ramifications of these objects for galaxy formation
and evolution. As first mentioned in yesterday's report and in HSTAR 6207,
the acquisition and re-acquisitions for this proposal defaulted to fine
lock on one FGS only. (See 2.3 also). Otherwise, the observations
completed normally with no reported problems.

1.7 Completed WF/PC-2 6802 (Cosmology With the Medium Deep Survey)

The WF/PC-2 was used to make observations taken in parallel with the
prime science observations as part of the Medium Deep Sky Survey. As first
mentioned in yesterday's report and in HSTAR 6307, the acquisition used for
this proposal defaulted to fine lock on one FGS only. (See 2.3 also).
Otherwise, the observations were executed as scheduled, and no problems
were reported.

1.8 Completed WF/PC-2 7203 (Cosmology with the Medium Deep Survey -
Short Orbit Cases)

The WF/PC-2 was used to take short (about 20 minute) exposures, to
be taken in parallel with the prime science observations, using the I
filter. These exposures are part of the Medium Deep Survey, which
emphasizes exposures that will be useful in obtaining cosmological
parameters. As first mentioned in yesterday's report and in HSTAR 6307,
the re-acquisition used for this proposal defaulted to fine lock on one FGS
only. (See 2.3 also) Otherwise, the observations were completed as
planned, and no problems were reported.

1.9 Completed Two Sets of WF/PC-2 7786 (Pure Parallel Archive Survey -
Continuation)

The WF/PC-2 was used to make observations as part of an archival
survey program in which the images were taken in parallel with the prime
science observations. These WF/PC-2 parallel observations were obtained in
the ultraviolet in a search for interesting objects. As first mentioned in
yesterday's report and in HSTAR 6307, the re-acquisition for this proposal
defaulted to fine lock on one FGS only. (See 2.3 also). Otherwise, the
observations were completed as planned, and no problems were reported.

1.10 Completed NIC/1/2 7443 (Mineralogic Mapping of Asteroid 4 Vesta)

The Near Infrared Camera (Cameras One and Two) was used to make
mineralogic mapping of asteroid 4 Vesta. The 1997 opposition of asteroid 4
Vesta offers an important opportunity to map its diverse mineralogy with
uniquely high contrast and to investigate more thoroughly the newly
discovered major topographic feature at the South Pole. The observations
were completed as planned, and no anomalies were reported.

1.11 Completed FGS 7677 (Monitor the Long Term Stability of FGS-3)

The goal of these measurements is to monitor the internal positional
stability of FGS-3 by measuring many stars in the M35 check field
repeatedly over a one year period. The results of these measurements are
the stability characteristics of FGS3 which allow an estimate of
differential corrections to OFAD and plate scale. The measurements were
completed as scheduled. with no reported anomalies.

1.12 Completed Two Sets of NIC/1/2/3 7729 (NICMOS Short One Orbit Parallel)

The Near Infrared Camera (Cameras One, Two, and Three) was used to
obtain "JHK" imaging of sky regions while another instrument was prime.
These observations were part of the short NICMOS one-orbit parallel
program. The observations were executed as scheduled, and no anomalies
were noted.

1.13 Completed Two Sets of STIS/CCD 7782 (STIS Non-Scripted Parallel
Archive Proposal - Half Orbit)

The Space Telescope Imaging Spectrograph (CCD) was used for a
non-scripted parallel archive proposal (one-half orbit). The observations
were executed as scheduled, and no anomalies were noted.

1.14 Completed WF/PC-2/NIC/3 7382 (The Star-Formation History of the
Large Magellanic Cloud)

The WF/PC-2 and the Near Infrared Camera (Camera Three) were used to
make observations of the disk of the Large Magellanic Cloud. These data
will enable us to quantitativly study the intermediate to low-mass stellar
populations and the star-formation history of the LMC. The observations
were executed as scheduled, and no anomalies were noted.

1.15 Completed STIS/MA1 7511 (Spectroscopy of the Interstellar Medium in
the Magellanic Bridge)

The Space Telescope Imaging Spectrograph (MA1) was used to make
spectrographic observations of the interstellar medium in the Magellanic
Bridge. The proposed observations will provide an opportunity to
investigate the physical conditions within the Bridge gas, and to determine
the chemical composition of important elements such as C, N, O, Mg, Si, S,
and Fe. The observations were executed as scheduled, and no anomalies were
noted.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 7
Successful : 7

Scheduled Reacquisitions : 6
Successful : 6

2.2 FHST Updates:

Scheduled : 14
Successful : 14

2.3 Operations Notes:

HSTAR 6207, mentioned in yesterday's report and referred to in 1.6 -
1.9 above, described acquisition and re-acquisition defaults to fine lock
on one FGS only. Subseqent analyses of these events indicate that in
addition there were some cases of delayed re-acquisitions , multiple
re-acquisition attempts, and even re-acquisition failures during the
interval of these proposals while at the same pointing. As a result,
HSTARs 6210 - 6213 were written.

The SSR interrupt log was dumped at 294/2312Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH