Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_00/hst_status_12_22_00 Дата изменения: Fri Dec 22 15:35:23 2000 Дата индексирования: Sun Dec 23 10:18:29 2007 Кодировка: Поисковые слова: ngc 5128

HUBBLE SPACE TELESCOPE

DAILY REPORT #2775

PERIOD COVERED: 0000Z (UTC) 12/21/00 - 0000Z (UTC) 12/22/00

Daily Status Report as of 357/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed STIS/CCD 8664 (Structural Measurement of Globular
Clusters in M31 and NGC 5128: Stalking the Fundamental Plane)

The Space Telescope Imaging Spectrograph (CCD) was used to observe
in the snapshot mode to image a wide selection of individual globular
clusters in two other large galaxies {M31 and NGC 5128} for measurement of
their structural parameters {r_c, c, central surface brightness}. We will
use these to compute their binding energies and define the FP in these two
galaxies. Comparison with the Milky Way will then give us powerful new
information on just how ``universal'' the cluster formation process was in
the early protogalaxies. The observations completed with no reported problems.

1.2 Completed Three Sets of WF/PC-2 8827 (Cycle 9 Supplemental Darks pt2/3)

The WF/PC-2 was used to obtain three dark frames every day to
provide data for monitoring and characterizing the evolution of hot
pixels. The proposal completed nominally.

1.3 Completed Two Sets of STIS/CCD 8837 (CCD Dark Monitor-Part 1)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the darks. The proposal completed with no reported problems.

1.4 Completed WF/PC-2/STIS/CCD 8641 (Testing the Accelerating Universe)

The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were
used to observe Type Ia supernovae which provide evidence for an
accelerating universe: an extraordinary result that needs to be rigorously
tested. The observations completed with no reported problems.

1.5 Completed Three Sets of WF/PC-2 8815 (Cycle 9 Earth Flats)

The WF/PC-2 was used to monitor flatfield stability. This proposal
obtains sequences of Earth streak flats to construct high quality flat
fields for the WF/PC-2 filter set. These flat fields will allow mapping of
the OTA illumination pattern and will be used in conjunction with previous
internal and external flats to generate new pipeline superflats. The
proposal completed nominally.

1.6 Completed Six Sets of STIS/CCD 8836 (Performance Monitor {Cycle 9})

The Space Telescope Imaging Spectrograph (CCD) was used to measure
the baseline performance and commandability of the CCD subsystem. Only
primary amplifier D was used. Bias and Flat Field
exposures were taken in order to measure read noise, CTE, and
gain. Numerous bias frames were taken to permit construction of
"superbias" frames in which the effects of read noise have been rendered
negligible. Full frame and binned observations were made, with binning
factors of 2 x 1, 1 x 2, 2 x 2, 4 x 1, and 4 x 2. Dark images were taken
in 2x2 binning mode; 1x1 binning darks are being taken in the nominal CCD
Dark Monitor. The exercise completed nominally.

1.7 Completed WF/PC-2 8581 (A Search For Low-Mass Companions To
Ultracool Dwarfs)

The WF/PC-2 was used to search for very low-mass {VLM} companions
to a complete sample of 120 late-M and L dwarfs, drawn mainly from the
2MASS and SDSS surveys. The primary goal is to determine the multiplicity
of M < 0.1 M_odot dwarfs. In particular, we aim to identify binary systems
suitable for long-term astrometric monitoring and mass measurement, and
systems with cool, sub-1000K companions. The proposal completed with no
reported problems.

1.8 Completed FGS/1R 8469 (Calibrating FGS1R's Optical Field Angle
Distortion {OFAD})

Fine Guidance Sensor 1R was used to gather the data needed to
calibrate the optical field angle distortions in FGS1R to the level of
accuracy required for astrometry science. Selected stars from the galactic
cluster M35 are repeatedly observed in POSITION mode by FGS1R with the
F583W filter at a variety of spacecraft pointings and telescope roll
angles. There were no problems.

1.9 Completed Seven Sets of STIS/CCD 8562 (Probing the Large Scale
Structure: Cosmic Shear Observations)

The Space Telescope Imaging Spectrograph (CCD) was used to probe
the distortion of light bundles from distant galaxies, looking at the
statistical properties of the intervening inhomogeneous {dark} matter
distribution. The proposal completed nominally.

1.10 Completed STIS/CCD 8838 (Bias Monitor - Part 1)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the bias in the 1x1, 1x2, 2x1, and 2x2 bin settings at gain=1, and 1x1 at
gain = 4, to build up high-S/N superbiases and track the evolution of hot
columns. The proposal completed nominally.

1.11 Completed Two Sets of FGS/1R 8834 (Calibrating Interferometric
Response as a Function of Spectral Color)

Fine Guidance Sensor 1R was used to obtain reference point source
Transfer Functions {S-Curves} through the F583W filter at the center
position of the FOV for a variety of spectral colors. The proposal
completed with no reported problems.

1.12 Completed Three Sets of STIS/MA1/MA2 8843 (Cycle 9 MAMA Dark
Measurements)

The Space Telescope Imaging Spectrograph (MA1 and MA2) was used to
perform the routine monitoring of the MAMA detector dark noise. The
proposal completed nominally.

1.13 Completed STIS/CCD/MA1 8691 (Calibrating the Cosmic Meter Stick:
The Distance to the LMC Using Eclipsing Binaries)

The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
measure the LMC distance which is crucial for the calibration of the Cosmic
Distance Scale. The observations completed with no reported problems.

1.14 Completed Two Sets of WF/PC-2 8815 (Cycle 9 Earth Flats)

The WF/PC-2 was used to monitor flatfield stability. This proposal
obtains sequences of Earth streak flats to construct high quality flat
fields for the WF/PC-2 filter set. These flat fields will allow mapping of
the OTA illumination pattern and will be used in conjunction with previous
internal and external flats to generate new pipeline superflats. The
proposal completed nominally.

1.15 Completed Three Sets of WF/PC-2 8883 (POMS Test Proposal: WFII
Backup Parallel Archive Proposal II)

The WF/PC-2 was used to complete a POMS test proposal designed to
simulate scientific plans. There were no reported problems.

1.16 Completed WF/PC-2 8599 (A Census of Nuclear Star Clusters in
Late-Type Spiral Galaxies)

The WF/PC-2 was used to conduct an I-band snapshot survey of a
well-defined sample of nearby, face-on spiral galaxies of type Scd or
later. The proposal completed nominally.

1.17 Completed STIS/CCD 8846 (Imaging Flats C9)

The Space Telescope Imaging Spectrograph (CCD) was used to
investigate flat-field stability over a monthly period. The proposal
completed nominally.

1.18 Completed FGS 8729 (Speedy Gonzales Mass Determinations: Fast
Orbiting Red Dwarf Systems)

The FGSs were used to observe five fast-orbiting red dwarf systems
to determine masses for objects near the end of the stellar main
sequence. All five systems have periods of two years or less, hence the
moniker "Speedy Gonzales'' systems. In addition, all have parallaxes
placing them within 10 parsecs, so high quality masses with errors less
than 5% can be derived. The observation completed as planned.

1.19 Completed WF/PC-2 8326 (Colliding Stellar Winds and
Proto-Planetary Dynamics)

The WF/PC-2 was used to investigate the interaction between a fast
post-AGB collimated wind and a slowly expanding, dense AGB wind which is
believed to be the dominant dynamical effect in the evolution of
protoplanetary nebulae {PPNe} and the shaping of planetary nebula
QX-PUP. The proposal completed with no reported problems.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 11
Successful: 11

Per HSTAR 8016, the acquisition at 357/093354Z defaulted to fine
lock backup on FGS-2 only when a walkdown failure occurred on FGS-1. Two
proposals, each occurring during the period of the next report, may have
been affected: STIS 8691 and WF/PC-2 8059.
Scheduled Re-acquisitions: 6
Successful: 6

2.2 FHST Updates:
Scheduled: 26
Successful: 26

2.3 Operations Notes:

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

The next Daily Report will be issued on Wednesday morning, December
27, 2000.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW