Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_96/hst_status_09_16_96 Дата изменения: Mon Sep 16 14:45:57 1996 Дата индексирования: Sun Dec 23 10:46:16 2007 Кодировка: Поисковые слова: ngc 6251

HUBBLE SPACE TELESCOPE

DAILY REPORT #1718

PERIOD COVERED: 0000Z (UTC) 09/13/96 - 0000Z (UTC) 09/16/96

Daily Status Report as of 260/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Six 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 FOS/BL 6688 (The Accretion Disk and White Dwarf in the =
Dwarf Nova HS1804+6753)

The Faint Object Spectrograph (Blue Side) was used to make rapid =
mode spectrographic observations of the eclipsing, dwarf nova HS1804+675 =
in order to study its accretion disk and white dwarf star. The data will =
be used to look for supersonic turbulence in the outer accretion disk, to =
confirm results obtained from the OY Car system (i.e., another dwarf =
nova). The observations were executed as scheduled, and no anomalies =
were noted.

1.3 Completed WF/PC-2 6431 (Determination of the Extragalactric =
Distance Scale)

The WF/PC-2 was used to make observations of the galaxy NGC-1425 =
to be used in measuring the periods of Cepheid variable stars within this =
galaxy. This will allow for a more accurate estimate of the distances to =
these galaxies through the period-luminosity relation for the Cepheid =
stars. The observations were executed as scheduled, and no anomalies =
were noted.

1.4 Completed WF/PC-2 6653 (Kinematics of Ionized Gas in the Dusty =
Nuclear Disk in NGC-6251)

The WF/PC-2 was used to make observations of the dusty nuclear =
disk and nuclear region of galaxy NGC-6251 in order to study the =
kinematics of its ionized gas. The data will be used to study the =
morphology and dynamics of the ionized gas in the nuclear disk. The =
observations were completed as planned, and no problems were reported.

1.5 Completed FOS/BL 6682 (Geometry and Generalizability of the =
Reflected Light Model for Seyfert Galaxies)

The Faint Object Spectrograph (Blue Side) was used to make =
spectropolarimetry observations of the Seyfert (class 2) galaxy MARK270 =
in order to study its geometry and the generalizablity of its reflected =
light model. The goal is to determine if the polarization components of =
all Seyfert class two galaxies have Seyfert class one characteristics. =
The observations were completed as scheduled, and no problems were =
reported.

1.6 Completed WF/PC-2 5966 (The Origin of the Allignment Effect: =
Spectroscopy and Imaging of Radio Sources)

The WF/PC-2 was used to make images of the radio galaxy 3C368. =
The WF/PC-2 will be used to image the galaxy at continuum and emission =
line wave lengths, and the images will be used to determine the position =
at which the FOS will later be used to observe the emission line =
spectrum. The observations were completed as planned, and no anomalies =
were reported.

1.7 Completed WF/PC-2 6361 (High Resolution Imaging of X-Ray Selected =
AGNs)

The WF/PC-2 was used to make high resolution observations of the =
known low red-shifted x-ray active galactic nuclius (AGN) MS1059.0+7. =
These data will allow a study of the optical properties of an unbiased =
sample of AGN host galaxies. The observations were completed as =
scheduled, and no problems were reported.

1.8 Completed Four Sets of FOS/RD 6796 (Spectral Mapping of Accretion =
Disks in Cataclysmic Binaries)

The Faint Object Spectrograph (Red Side) was used to make rapid =
mode spectrographic mapping observations of the accretion disk around the =
cataclysmic binary system V348-Puppis taken during the system's eclipse =
phase. The acquisition for the final iteration of this proposal failed =
to fine lock on one FGS only, and HSTAR 5712 was written. Any possible =
effect on science is not currently known. Otherwise, all other =
observations were completed as planned, and no further problems were =
reported.

1.9 Completed FGS 6486 (Orbits of Pre-Main Sequence Binaries)

The FGSs were used in the TRANS mode to make astrometric =
observations of the per-main sequence, binary star system HV-Tau in order =
to help compute its orbital parameters. The observations will be used to =
make orbital maps of T-Tauri class stars. From these orbital parameters =
will be able derived the first reliable mass measurements for low mass =
pre-main sequence stars. The observations were completed as scheduled, =
and no anomalies were reported.

1.10 Completed FGS 6874 (Parallaxes of Hyades Cluster Members, Cycle 6 =
- High)

The FGSs were used to make parallax astrometric observations of =
the star VA472 and several other reference stars within the Hyades star =
cluster, to better define the Population 1 zero age main sequence. The =
observations were completed as planned, and no problems were reported.

1.11 Completed GHRS/2 6542 (Inter Stellar Carbon Abundance in Low =
Density Gas)

The High Resolution Spectrograph (Side Two) was used to make =
observations of the star HD57061 (aka , Tau Canis) in order to study the =
weak interstellar Carbon Il (2325 A0) line abundances in the line of =
sight to the target star. These data will be used to set practical =
limits on the gas-phase variability of the Carbon/Hydrogen ratio in low =
density gas and on the resiliency of the Carbon carriers in non-atomic =
form. The observations were completed as planned, and no anomalies were =
reported.

1.12 Completed FOS/RD 6110 (Abundances of Evolved Massive Stars in the =
LMC)

The Faint Object Spectrograph (Red Side) was used to make =
spectrographic observations of the ejecta from the evolved luminous =
massive star S119 which is located in the Large Magellanic Cloud. This =
star is at a point in its evolution between an O class star and a =
Wolf-Rayet class star, and the spectra will be used to determine the =
elemental abundances and electron temperatures and densities. The =
observations were executed as scheduled, and no anomalies were noted.

1.13 Completed WF/PC-2 6519 (Parallel High Resolution Imaging of =
Defuse Objects in the Magellanic Clouds)

The WF/PC-2 was used to make high resolution observations of a =
defuse object located in the Large Magellanic Cloud. These data will =
allow the detailed study of the morphology and spatial relationship of =
various inter-stellar processes. These observations were taken in =
parallel with the prime science observations. The observations were =
executed as scheduled, and no anomalies were noted.

1.14 Completed GHRS/2 6530 (The Wind Momentum: Luminosity Relationship =
for LMC A and B Supergiants)

The High Resolution Spectrograph (Side Two) was used to make =
spectrographic observations the A/B class, supergiant star HDE270086 =
which is located in the Large Magellanic Cloud. These data are part of a =
large effort to calibrate the wind momentum-luminosity function for =
supergiant stars. The observations were completed as planned, and no =
problems were reported.

1.15 Completed GHRS/2 6541 (Interstellar Cadmium: Probing Galactic =
Chemical Evolution)

The High Resolution Spectrograph (Side Two) was used to make =
spectrographic observations of the O/B class star HD37128 in order to =
probe interstellar Cadmium and study the galactic chemical evolution. =
The observations were completed as planned, and no problems were =
reported.

1.16 Completed FOS/BL 6624 (Time-Resolved Spectrophotometry of the =
Smallest Mass Function Binaries)

The Faint Object Spectrograph (Blue Side) was used to make time =
resolved, period mode, spectrographic observations of a low mass, x-ray, =
binary star system X1626-67. The observations covered an entire orbital =
period, but not one orbit. An internal calibration image was also taken. =
The observations were completed as planned, and no anomalies were noted. =


2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 18
Successful : 18

The acquisition at 259/211110Z failed to fine lock on one FGS =
only. HSTAR 5712 was written.

Scheduled Reacquisitions : 15
Successful : 15

2.2 FHST Updates:

Scheduled : 38
Successful : 38

2.3 Operations Notes:

A TTR was written for a 19-minute, 41-second loss of real-time =
data due to severe weather at WSGTU.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Nothing at this time.

/DMH