Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_96/hst_status_03_04_96 Дата изменения: Mon Mar 4 15:50:22 1996 Дата индексирования: Sun Dec 23 10:42:49 2007 Кодировка: Поисковые слова: jupiter's moons

HUBBLE SPACE TELESCOPE

DAILY REPORT #1582

PERIOD COVERED: 0000Z (UTC) 03/01/96 - 0000Z (UTC) 03/04/96

Daily Status Report as of 064/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Four Sets of WF/PC-2 6009 (Jovian Stratospheric and =
Tropospheric Circulation and Structure)

The WF/PC-2 was used to make high resolution, multi-filter =
observations of the planet Jupiter to study it stratospheric and =
tropospheric circulation and structure. This study is being done several =
months before and after the Galileo probe enters the atmosphere on Dec. 7, =
1995. In the first iteration of this proposal, the initial acquisition and =
each of the four re-acquisitions failed when the step scan limit was =
exceeded. HSTAR 5522 was written. Later, during the third iteration of =
this proposal, a guide star acquisition at 061/211058Z failed. The take =
data flag stayed down until a type 3 slew at 061/214226Z. These events =
are documented in HSTAR 5523. The other iterations were completed as =
scheduled, and no other anomalies were reported.

1.2 Completed Four Sets of FOS/RD 6167 (FOS Cycle 5: Dark Monitoring)

The Faint Object Spectrograph (Red Side) was used to make several =
dark calibration images. All exposures were internals. All spectra was =
done in the image mode. The observations were completed as planned, and =
no problems were reported.

1.3 Complete Five Sets of WF/PC-2 5993 (Dark Matter Distribution in =
A1689 from gravitational lensing)

The WF/PC-2 was used to make observations of galactic clusters =
A1689-3, A1689-13, A1689-9, A1689-7 and A1689-15 in order to study the =
distribution of dark matter in these lensing galaxy cluster systems. This =
is to carry out an extensive survey of the galaxies lying behind this =
cluster. The observations were completed as planned, and no problems were =
reported.

1.4 Completed FGS 6262 (High Speed Astrometry - Barnard's Star)

The Fine Guidance Sensors were used to make high speed astrometric =
observations of Barnard's Star and seven reference stars. The =
observations were executed as scheduled, and no anomalies were noted.

1.5 Completed WF/P-2 6254 (GTO Pure Parallel Program - Cycle 5)

The WF/PC-2 was use to make random long exposures of high galactic =
fields taken in parallel with the prime science observations to obtain a =
random sample of galaxies. The observations were executed as scheduled, =
and no anomalies were noted.

1.6 Completed FOC/96 6196 (FOC Cycle 5 Absolute Sensitivity =
Calibrations)

The Faint Object Camera (f/96) was used to make ultraviolet through =
the visible observations of standard object HZ4 in order to do an absolute =
sensitivity calibration. The observations were executed as scheduled, and =
no anomalies were noted.

1.7 Completed WF/PC-2 6250 (WF/PC-2 Cycle 5 Calibration: Internal =
Monitor)

The WF/PC-2 was used to make a series on internal calibration =
observations. Internal flats, biases, and K-Spot calibration images were =
taken. These observations are designed to monitor the health of the =
cameras. The observations were executed as scheduled, and no anomalies =
were noted.

1.8 Completed Three Sets of WF/PC-2 6363 (The Environments and Host =
Galaxies of BL-Lac Objects)

The WF/PC-2 was used to make snapshot survey observations to BL-Lac =
object IES1544+82, IES0033+59 and IES0502+67 in order to study their =
environments and their host galaxies. The goal is to investigate =
systematic trends in host galaxy type, unusual morphological features, =
nearby companion galaxies, etc. The observations were executed as =
scheduled, and no anomalies were noted.

1.9 Completed WF/PC-2 6842 (Evolution of the New Bright Spot On Io)

The WF/PC-2 was used to make multi-color image observations of =
Jupiter's moon Io while it is at 320 degrees elongation in order to study =
its new white spot. This is a follow up to an earlier HST proposal, which =
discovered the new bright spot on Io. The observations were executed as =
scheduled, and no anomalies were noted.

1.10 Completed FGS 6238 (Companion to GL6230)

The FGSs were used to make POS and TRANS mode astrometric =
observations of star GL623 (aka, Gleise 623) looking for possible =
companions. Five other reference stars were also used. From these data =
the precise parallax, barycentic orbits, and accurate masses of the star =
and its companion will be determined. The observations were completed as =
schedule, and no anomalies were reported.

1.11 Completed FOS/BL 5498 (Flickering as a Probe of Accretion Disk =
Structures)

The Faint Object Spectrograph (Blue Side) was used in the rapid =
mode to obtain spectra of the cataclysmic variable star V3885-SGR. =
"Flickering" has been observed in stars of this type due to the accretion =
process. The flickering rate will be compared in the ultraviolet and =
longer wavelengths. The observations were executed as scheduled, and no =
anomalies were noted.

1.12 Completed WF/PC-2 5971 (HST Medium Deep Survey)

The WF/PC-2 was used to make a long exposure medium deep sky survey =
observations at latitudes larger than 10 degrees taken in parallel with =
the prime science observations. The observations were executed as =
scheduled, and no anomalies were noted.

1.13 Completed GHRS/1 5726 (Composition of Gas in Individual =
Interstellar Clouds: Cycle 4 Carryover)

The High Resolution Spectrograph (Side One) was used to make =
observations of standard early type star HD151890 which is located in the =
galactic disk to study the composition of interstellar gas clouds. =
Spectral lines due to atoms such as C, N, O, Si, Mg, and S in different =
ionization states should be seen in the line of sight of this star. The =
observations were executed as scheduled, and no anomalies were noted.

1.14 Completed Two Sets of WF/PC-2 6365 (A Snapshot survey For =
Companions and Clusters around Wolf-Rayet Stars)

The WF/PC-2 was used to make snapshot observations of Wolf-Rayet =
star WR25 in order to look for companion stars and clusters. Photometry =
was performed on the Wolf-Rayet star and associated stars. The =
observations were completed as planned, and no anomalies were reported.

1.15 Completed WF/PC-2 5972 (Determination of the Extragalactic =
Distance Scale)

The WF/PC-2 was used to make observations of the galaxy NGC-2090 =
looking for standard candle Cepheid variable stars. The purpose of these =
observations is to help estimate the Hubble constant with an accuracy of =
10%. The observations were executed as scheduled, and no anomalies were =
noted.

1.16 Completed WF/PC-2 5984 (Absorption - Selected Galaxies)

The WF/PC-2 was used to study the morphology of a foreground =
galaxy, at redshifts from 0.4 to 1.0, that is absorbing light from =
background quasar Q0450-1310. The absorbing galaxy was discovered from =
ground-based surveys. The observation was completed with no reported =
anomalies.

1.17 Completed FGS/WF/PC-2 6062 (HD98800, An Extraordinary Star)

The WF/PC-2 and the FGSs were used to observe HD98800, a nearby =
multiple star with strong infrared emission. The infrared emission =
presumably comes from a thick disc around the system. The proposal will =
measure the strength of the Mg II line at 2800A, and will adress the =
fundamental questions about disk formation, maintenance, and dynamics. =
The two FHST updates that occurred just prior to this proposal failed. =
However, the observations were executed as scheduled, and no anomalies =
were reported.

1.18 Completed WF/PC-2 5849 (Host Galaxies of Luminous Nearby Quasars)

The WF/PC-2 was used to make deep exposure observations of host =
galaxy MMJ6511 which is known to have a luminous nearby quasar. The =
observations were executed as scheduled, and no anomalies were noted.

1.19 Completed GHRS/2 6289 (High Resolution Spectroscopy with HST-Final =
GTO Observations)

The High Resolution Spectrograph (Side Two) was used to make high =
resolution spectrographic observations of the star Epsilon Aurigae (aka, =
HD149757). The observations were completed as planned, and no anomalies =
were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 28
Successful : 28

Scheduled Reacquisitions : 18
Successful : 17

As described in HSTAR 5523, the re-acquisition scheduled at =
061/211058Z failed. The take data flag stayed down until fine lock was =
achieved after a type 3 slew at 061/214226Z.






2.2 FHST Updates:

Scheduled : 64
Successful : 62

Updates at 063/154820Z and 063/155105Z failed.

2.3 Operations Notes:

There were no significant problems reported.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

GSFC Internal Simulation #2 (EVA #1) is scheduled on Wednesday.

/DMH