Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_98/hst_status_07_08_98 Дата изменения: Wed Jul 8 15:04:02 1998 Дата индексирования: Sun Dec 23 10:56:51 2007 Кодировка: Поисковые слова: moon

HUBBLE SPACE TELESCOPE

DAILY REPORT #2160

PERIOD COVERED: 0000Z (UTC) 07/07/98 - 0000Z (UTC) 07/08/98

Daily Status Report as of 189/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Three 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.

1.2 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 NIC/1/2/3 7896 (A NIR Snapshot Survey of Ultraluminous IR
Galaxies)

The Near Infrared Camera (Cameras One, Two and Three) was used to
make snapshot survey observations of the ultraluminous infrared galaxy
IR20100-41. Nearly all of these galaxies show evidence for a recent tidal
interaction, and we will search for evidence of the merger progenitors near
the center of each galaxy, a task made significantly easier with NIR
imaging. The observations were completed as planned, and no anomalies were
noted.

1.4 Completed NIC/1/2/3 7859 (Blue Compact Dwarf Galaxies -- Young or Old?)

The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the compact young dwarf galaxy UGCA281. These blue
compact dwarf galaxies challenge models of galaxy formation to explain the
presence of small, low-metallicity galaxies experiencing vigorous bursts of
star formation. The observations were completed as scheduled, and no
problems were reported.

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 WF/PC-2 6837 (The Ultraviolet Properties of "Dwarf"
Seyfert 1 Nuclei)

The WF/PC-2 was used to make ultraviolet observations of the
"dwarf", type one, Seyfert galaxy NGC-4168. This class of "dwarf" Seyfert
populate the faint end of the local AGN luminosity function and hold
important clues to the evolution of the entire AGN population. The
observations were completed as scheduled, and no problems were reported.

1.7 Completed Four 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 6776 (A Comparative HST Imaging Study of Radio
Galaxies and Hosts)

A clear understanding of the nature of the host galaxies of
radio-quiet quasars, radio-loud quasars and radio galaxies is of central
importance in any attempt to unify and relate the three main classes of
powerful active galaxies. Existing HST studies of quasar hosts, whilst
producing many interesting new results, have yielded surprisingly little
hard information on the properties of the hosts themselves. This imaging
study of PKS1217+02 using the WF/PC-2 will remedy this situation by
undertaking redder, line-free observations of our three matched AGN
samples. The proposal completed with no reported problems.

1.9 Completed WF/PC-2 7501 (Expansion Parallax Distances to Planetary
Nebulae)

The WF/PC-2 was used to make parallax distance measurements of the
planetary nebula NGC-7026. The largest impediment to our understanding of
planetary nebulae is the lack of reliable distances. Acquired by
generalized statistical methods in all but a handful of cases, individual
PNe distances are often uncertain by factors of two or more. The
observations were executed as scheduled, and no anomalies were noted.

1.10 Completed STIS/CCD/MA1 7613 (Structure and evolution of the
globular cluster low mass X-ray binary AC211 in M15)

The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make observations of the globular cluster NGC-7078 (a.k.a., M-15) in order
to study its binary x-ray star AC211. AC211 is optically the brightest
counterpart of any globular cluster X-ray binary, and one of the brightest
amongst all LMXBs. Given its large UV excess and high orbital inclination
{evident from its large UV eclipse} this object is a prime target for HST.
A wavelength calibration image was also taken. The observations were
executed as scheduled, and no anomalies were noted.

1.11 Completed NIC/1/2/3 7226 (Search for Massive Jupiters)

The Near Infrared Camera (Camera One, Two and Three) was used to
make a corographic search for massive planets around the nearby, young main
sequence star GL875.1. Because of the extreme youth of this object, any
low-mass brown dwarf and planetary companions will still be in a higher
luminosity phase and thus easily detectable. A dark calibration image was
also taken. 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 : 9
Successful : 9

2.2 FHST Updates:

Scheduled : 13
Successful : 13

2.3 Operations Notes:

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

The NSCC-1 status buffer was dumped at 189/0003Z as directed by ROP
NS-3.

The SSA1 transmitter was commanded on and off for SSR dumps per ROP
IC-2.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH