Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_96/hst_status_12_16_96 Дата изменения: Mon Dec 16 15:34:29 1996 Дата индексирования: Sun Dec 23 10:47:29 2007 Кодировка: Поисковые слова: ultraviolet

HUBBLE SPACE TELESCOPE

DAILY REPORT #1779

PERIOD COVERED: 0000Z (UTC) 12/13/96 - 0000Z (UTC) 12/16/96

Daily Status Report as of 351/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Two Sets of WF/PC-2 6253 (Pure Parallel Archive Program)

The WF/PC-2 was used to execute a pure parallel program taking =
ultraviolet observations running concurrently with prime science =
observations. The intent is to search for extra-galactic sources with =
flux excesses at 3000 A0 and galactic sources with excesses at 1600 A0. =
The observations were completed as planned, and no problems were =
reported.

1.2 Completed WF/PC-2 6362 (Supernova Host Galaxy)

The WF/PC-2 was used to make observations of the supernova host =
galaxy GAL-122852. The observations were executed as scheduled, and no =
anomalies were noted.

1.3 Completed WF/PC-2 6351 (Resolving SDB Binary Systems)

The WF/PC-2 was used to make high resolution images of the sdB =
class, binary system STAR-22817 in order to try and resolve its two =
individual stars. sEvidence has accumulated that a large fraction (if not =
all) of the sdB class stars are found in binary systems. The =
observations were executed as scheduled, and no anomalies were noted.

1.4 Completed FOS/BL 6465 (The UV Upturn of Super-Metal-Rich Globular =
Clusters)

The Faint Object Spectrograph (Blue Side) was used to make =
ultraviolet spectrographic observations of the super-metal-rich globular =
cluster NGC-224-G17 which is located within the Andromeda Galaxy (aka, =
M-31) in order to observe the spectral energy distribution of this =
cluster. The objective is to determine whether the strong ultraviolet =
fluxes seen in the galaxy can also be seen in this cluster. The observati=
ons were executed as scheduled, and no problems were reported

1.5 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. The observations were completed as planned, and no problems w=
ere reported.

1.6 Completed FOS/BL 6911 (FOS Cycle 6: Discriminator Test)

The Faint Object Spectrograph (Blue Side) was used to execute a =
discriminator calibration test. Because both the noise and gain are =
known to be temperature sensitive, it is likely that some fraction of the =
channels will experience some change in their optical discriminator =
settings on orbit. An internal flat calibration image was also taken. =
The observations were completed as planned, and no anomalies were =
reported.

1.7 Completed GHRS/2 6455 (Metal Diffusion and Radiative Levitation in =
Hot Helium Rich White Dwarfs)

The High Resolution Spectrograph (Side Two) was used to make =
spectrographic observations of the hot, helium-rich, white dwarf star =
HZ21 in order to study its metal diffusion and radiative levitation. The =
data will be used to search for weak photospheric metal absorption lines =
which were too weak to be observed at optical wavelengths. The =
observations were executed as planned, and no anomalies were reported.

1.8 Completed FOS/BL 6799 (The BAL Region Covering Factor in a Sample =
of IRAS-Selected QSOs)

The Faint Object Spectrograph (Blue Side) was used to make =
spectrographic observations of QSO IR1321+055 in order to determine the =
criteria by which the presence of BALs in the spectra may be predicted. =
The observations were completed as planned, and no problems were =
reported.

1.9 Completed WF/PC-2 6903 (WF/PC-2 Cycle 6 Calibration: =
Decontamination)

The WF/PC-2 was used to make several calibration bias =
observations, internal flats, K-Spot images and dark calibration images =
which are all part of a Cycle 6 decontamination procedure. No science =
was interleaved with the dark exposures. The observations were completed =
as scheduled, and no problems were reported.

1.10 Completed FOS/RD 6622 (UV Spectroscopy of DR1, the WO3 Star in =
IC1613 and its surrounding Nebula)

The Faint Object Spectrograph (Red Side) was used to make =
ultraviolet spectrographic observations of the very luminous, WO3 =
(Wolf-Rayet) class star DR-1 which is located in the metal-poor, dwarf, =
irregular galaxy IC-1613. Observations were also be taken of its =
surrounding nebula. The observations were completed as planned, and no =
problems were reported.

1.11 Completed WF/PC-2 6909 (WF/PC-2 Cycle 6 Calibration: Earth Flats)

The WF/PC-2 was used to make observations of the bright earth to =
obtain streak flats which are used to construct high quality flat fields =
for the WF/PC-2 filter set. The observations were executed as scheduled, =
and no anomalies were noted.

At this point, the safemade event described
in 2.3 occurred, and the following scheduled
proposals did not execute:

1. FOC/96 6349 (Snapshot search for High Redshift QSOs with Far-
UV Flux)
2. FOS/BL/GHRS/1 6466 (Fundamental Properties of a DA-dM
Detached Binary With Period=3D 3H 37M)
3. Three Sets of WF/PC-2 6253 (Pure Parallel Archive
Program)
4. WF/PC-2 6362 (Supernova Host Galaxy)
5. FOS/BL 6465 (The UV Upturn of Super-Metal-Rich Globular
Clusters)
6. FOS/BL 6539 (Ultraviolet Spectroscope of Seyfert 2 Nuclei)
7. Two Sets of WF/PC-2 6903 (WF/PC-2 Cycle 6 Calibration:
Decontamination)
8. GHRS/2 6620 (Density Diagnostics for the Dynamic Atmospheres
of LPV Stars)
9. WF/PC-2 6053 (Extreme UV Stars in Omega Cent)
10. GHRS/2 6534 (Be-Deficient Halo Stars: Implications For
Galactic Chemical Evolution)

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 5
Successful : 5
Scheduled Reacquisitions : 13
Successful : 13

2.2 FHST Updates:

Scheduled : 8
Successful : 8

2.3 Operations Notes:

At 349/152802Z and as described in HSTAR 5845, the HST entered =
Software Sumpoint Mode. As had occurred on October 30, the safemode test =
for the RWA-1 momentum test failed, the wheel was commanded to off, and =
safemode was entered.

A RWA-1 power-on/torque test was successfully performed at =
349/2047Z. A Health and Safety load was uplinked and began executing at =
350/1700Z. Normal science operations are scheduled to resume at =
351/1645Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Nothing at this time.
/DMH