Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_98/hst_status_11_12_98 Дата изменения: Thu Nov 12 15:19:35 1998 Дата индексирования: Sun Dec 23 10:59:02 2007 Кодировка: Поисковые слова: jupiter's moons

HUBBLE SPACE TELESCOPE

DAILY REPORT #2249

PERIOD COVERED: 0000Z (UTC) 11/11/98 - 0000Z (UTC) 11/12/98

Daily Status Report as of 316/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Seven 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.

1.2 Completed Four 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 further anomalies were
noted.

1.3 Completed STIS/CCD/MA1 7283 (Observation of Circumstellar UV
Absorption Lines)

The Space Telescope Imaging Spectrograph was used to obtain high
S/N, high-spectral-resolution, far-UV spectra of the central star of the
planetary nebula BD+30D3639 in order to study absorption lines arising
within the extended neutral and molecular envelopes around the ionized gas.
The observations executed as planned, and there were no reported anomalies.

1.4 Completed Eleven 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.

1.5 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.

1.6 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.

1.7 Completed NIC/1/2 7243 (High Resolution Imaging of Io)

The Near Infrared Camera (Cameras One and Two) was used to make
observations of Jupiter's moon Io and star SAO146868. The technique of
super-resolution imaging will be used to obtain near-IR images of Io with
sufficient resolution to map the surface on this volcanically active
satellite of Jupiter. Observations were also made of standard star
SAO146868. The observations were executed as scheduled, and no anomalies
were noted.

1.8 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 the low mass M class star LHS2924.
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.

1.9 Completed Nine Sets of STIS/CCD 8084 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation)

The Space Telescope Imaging Spectrograph (CCD) was used to make
non-scripted parallel high galactic latitude observations as part of POMS
test proposal. The observations were executed as scheduled, and no
anomalies were noted.

1.10 Completed STIS/CCD/MA2 7433 (UV Spectral Dating of Galaxies)

The Space Telescope Imaging Spectrograph (MA2) was used to make
ultraviolet spectrographic observations of HD102634 to calculate a highly
accurate library of UV stellar spectra that can be used to estimate the age
and metallicity of galaxies of intermediate age {between 1 and 8 Gyrs}.
The critical step in this effort is to test the model spectra against
high-quality UV spectra of real stars. A wave length calibration image was
also taken. The observations were executed as scheduled, and no anomalies
were noted.

1.11 Completed Two Sets of WF/PC-2 6483 (HST Observations of Galaxies in
a Close, Nonmerging Encounter)

The WF/PC-2 was used to make observations of the galaxies IC2163 and
NGC-2207, an nearby galaxy in a close nonmerging encounter. These data will
help clarify how interactions cause shocks, trigger star formation, and
possibly make bars. The observations were completed as scheduled, and no
problems were noted.

1.12 Completed WF/PC-2 6713 (Geometric Measurement of Galaxy Distance)

The WF/PC-2 was used to make observations of supernova remnant
SN1970G in order to make a distance calibration for the galaxy in which it
is located. The supernova is being used as a powerful new geometric method
for the determination of a galaxy's distance, by obtaining high spatial
resolution imaging polarization of the candidate supernova light echoes.
The observations were completed as planned, and no anomalies were reported.

1.13 Completed Three Sets of WF/PC-2 8059 (POMS Test Proposal: WF-2
Targeted Parallel Archive Proposal)

The WF/PC-2 was used to make observations in parallel with the prime
science observations. The parallel opportunities available with WF/PC-2 in
the neighborhood of bright galaxies are treated in a slightly different way
from the normal pure parallels. Local group galaxies offer the opportunity
for a closer look at young stellar populations. The observations were
completed as planned, and no anomalies were reported.

1.14 Completed Two Sets of STIS/CCD 7912 (STIS Parallel Archive Proposal
- Nearby Galaxies - Imaging and Spectroscopy)

The Space Telescope Imaging Spectrograph (CCD) was used to make
parallel observations of nearby galaxies. This survey will be useful to
study the star formation histories, chemical evolution, and distances to
these galaxies. These data will be placed immediately into the Hubble Data
Archive. The observations were completed as scheduled, and no problems
were reported.

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 Four Sets of 7329 (The Nature of the Damped LyAlpha
Absorbers -- A New Study of Young Galaxies)

The Near Infrared Camera (Camera Two) was used to make observations
of the young galaxy Q0249-2212 in order to study the nature of its damped
Lyman-Alpha Absorbers (DLAs). The DLA line systems, occasionally found in
quasar spectra, provide one of only a few practical methods of detecting
and studying significant numbers of galaxies at high redshifts. The
observations were executed as scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 8
Successful : 8

As documented in HSTAR 6768, the acquisition at 316/035053Z
defaulted to fine lock backup on FGS-1 only when the scan step limit was
exceeded on FGS-3. Subsequent re-acquisitions at 316/0521Z and 316/0659Z
also defaulted to fine lock backup on one FGS only. Proposals reviewed in
tomorrow's report may have been affected: STIS 7437, WF/PC-2 7909, NIC
7961, WF/PC-2 8059, NIC 7963, and WF/PC-2 8061.

Scheduled Reacquisitions : 8
Successful : 8

2.2 FHST Updates:

Scheduled : 16
Successful : 16

2.3 Operations Notes:

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

A TTR was written for IP data hits at 315/1047Z, 315/1117Z,
315/1146Z, and 315/1417Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH