Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_98/hst_status_11_03_98 Дата изменения: Tue Nov 3 15:05:14 1998 Дата индексирования: Sun Dec 23 10:58:51 2007 Кодировка: Поисковые слова: dust disk

HUBBLE SPACE TELESCOPE

DAILY REPORT #2242

PERIOD COVERED: 0000Z (UTC) 11/02/98 - 0000Z (UTC) 11/03/98

Daily Status Report as of 307/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Four Sets of NIC/2 7226 (Search for Massive Jupiters)

The Near Infrared Camera (Camera Two) was used to make a corographic
search for massive planets around nearby, young main sequence stars.
Because of the extreme youth of these objects, 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.

1.2 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 low mass M class stars. 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.

1.3 Completed Six Sets of WF/PC-2 7620 (WF/PC-2 Cycle 7 Standard Darks)

The WF/PC-2 was used to make a series of Cycle 7 standard dark
calibration images. This dark calibration program obtains dark frames
every week in order to provide data for the ongoing calibration of the CCD
dark current rate, and to monitor and characterize the evolution of hot
pixels. The observations were executed as scheduled, and no anomalies were
noted.

1.4 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.

1.5 Completed Eleven 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.

1.6 Completed Two 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 with no anomalies.

1.7 Completed WF/PC-2 7386 (A Snapshot Survey of Nova Shells)

The WF/PC-2 was used to make observational images of the super nova
shell V1819-CYG in order to detect and measure its expanding gaseous shell.
These observations will trace the distribution of hot and cool gas in the
nova shells, and show their degree of inhomogeneity on both large and small
scales. The observations were completed as scheduled, and no problems were
noted.

1.8 Completed STIS/MA2 7950 (Cycle 7 MAMA Dark Measurements)

The Space Telescope Imaging Spectrograph (MA2) was used to make a
dark calibration image. This is to establish if the detectors are
performing nominally, that no internal movement of the MCP has taken place,
and establish dark level in orbit for a given operating temperature. These
darks will be used in later image reduction and also trended over
instrument life time as indicators of detector degradation or damage. The
observations were completed as planned.

1.9 Completed Two Sets of STIS/CCD 7635 (STIS CCD Hot Pixel Annealing)

The Space Telescope Imaging Spectrograph (CCD) was used to test the
hot pixel annealing procedure. The effectiveness of the CCD hot pixel
annealing process is assessed by measuring the dark current behavior before
and after annealing and by searching for any window contamination effects.
The observations were completed as planned.

1.10 Completed Two Sets of WF/PC-2 6651 (WLR Distances from Accurate
Multi-Color WF/PC-2 Photometry of A & B Supergiants in M-31 and M-33)

The WF/PC-2 was used to make multi-color photometric observations of
NGC-224-41. This is to study A and B supergiant stars with a precision
far exceeding that of existing ground-based estimates. The observations
were completed as planned, and no problems were reported.

1.11 Completed Two Sets of NIC/1/2/3 7850 (Cosmological Parameters Omega
and Lambda from High-Z Type Ia Supernovae)

The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the type Ia super nova 5H1.3ZA in order to obtain the
cosmological parameters Omega and Lambda. HST can directly measure the
cosmological parameters, Omega, Lambda, and thus the curvature, Omega_k,
using Type Ia supernovae {SNe Ia} as calibrated standard candles. The
observations were executed as scheduled.

1.12 Completed 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.

1.13 Completed NIC/2 7233 (Dust Disks Around Main Sequence Stars)

The Near Infrared Camera (Camera Two) was used to make observations
of the dust disk around main sequence stars. The observations were made
with the coronagraph to minimize the effects of glare from the bright
central star. A dark calibration image was also taken. The observations
were completed as scheduled, and no anomalies were reported.

1.14 Completed WF/PC-2 6603 (Probing Proto-Planetary Disks in the Orion Nebula)

The WF/PC-2 was used to make images of the proto-planetary disk
NGC-1976 which is located in the Orion Nebula. This is to study the
fundamental physical properties and structures of recently discovered, and
uniquely visible, proto-planetary disks around young stars. The
observations were completed as planned, and no problems were reported.

1.15 Completed WF/PC-2 6666 (The Mass Function and Binary Star Fraction of
the Trapezium Cluster)

The WF/PC-2 was used to take deep images of the Trapezium cluster to
determine the low-mass end of the initial mass function, to search for
brown dwarfs, and to explore the close binary population in the cluster.
The observations completed as planned with no problems.

1.16 Completed WF/PC-2 6770 (Resolving the Nature of Nova Shells)

The WF/PC-2 was used to make images of the post nova remnant T-Aur
in order to study its surrounding shells structure. Past data has indicate
a strong correlation between nova speed class and the ellipticity of the
resulting remnants. The observations were completed as scheduled, and no
problems were noted.

1.17 Completed Two Sets of WF/PC-2 7278 (The Connection Between The
Obscuring Torus and the Masing Disk in H_20 Me)

The WF/PC-2 was used to investigate the connection between the
molecular torus and the emission line gas in a complete sample of H_2O
megamasers. The proposal completed nominally with no reported problems.

2.0 FLIGHT OPERATIONS SUMMARY

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 8
Successful : 8

Scheduled Reacquisitions : 5
Successful : 5

2.2 FHST Updates:

Scheduled : 15
Successful : 15

2.3 Operations Notes:

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

The SSA transmitter was manually turned on and off per ROP IC-2.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH