Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_00/hst_status_03_06_00 Дата изменения: Mon Mar 6 14:42:53 2000 Дата индексирования: Sun Dec 23 10:12:47 2007 Кодировка: Поисковые слова: galactic cluster

HUBBLE SPACE TELESCOPE

DAILY REPORT #2573

PERIOD COVERED: 0000Z (UTC) 03/03/00 - 0000Z (UTC) 03/06/00

Daily Status Report as of 066/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed Three Sets of STIS/CCD 8439 (Bias Monitor-Part 2 C8)

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 with no reported problems.

1.2 Completed Four Sets of WF/PC-2 8460 (Cycle 8 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 observations completed with no reported problems.

1.3 Completed Seven Sets of STIS/CCD 8202 (Bright Quasar Close Lensing
Search)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of HCLQ1131-2, HCLQ0552-5, HCLQ0724+4, HCLQ2120-5,
HCLQ0900+4,HCLQ1156+3, and HCLQ1413-2 as part of a second generation survey
to search for bright lensing quasars. With the restored PSF, new images
will be considerably more sensitive to the presence of both close
separation and faint lens components, and because STIS reaches two
magnitudes fainter the PC, the new snapshot images will have much greater
dynamic range. The observations were executed as scheduled, and no
anomalies were noted.

1.4 Completed Six Sets of STIS/CCD/MA1 8437 (Dark Monitor-Part 2 C8)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the darks. The proposal completed nominally.

1.5 Completed Two Sets of WF/PC-2 8230 (Snapshot Survey of Dynamically
Close Galaxy Pairs from z=0.1 to z=0.5)

The WF/PC-2 was used to make snapshot survey observations of
galactic clusters Gal-Clus-1 and Gal-Clus-0. This is to obtain snapshot
images of a large, well-defined, and dynamically selected sample of close
galaxy pairs at moderate redshift. The observations were executed as
scheduled, and no anomalies were noted.

1.6 Completed Twelve Sets of STIS/CCD 8549 (POMS Test Proposal:
Non-Scripted Parallel Proposal Continuation I)

The Space Telescope Imaging Spectrograph (CCD) was used to make low
galactic latitude, non-scripted parallel observations as part of a POMS
test proposal. The observations were completed as planned, and no
anomalies were reported.

1.7 Completed STIS/CCD/MA1/MA2 8608 (Simultaneous HST, Chandra, and
FUSE Spectroscopy of NGC 4151)

The Space Telescope Imaging Spectrograph (CCD, MA1, and MA2) was
used to observe NGC 4151 and investigate the absorption by warm, ionized
gas at UV and X-ray wavelengths, which is proving to be a common feature
in Seyfert 1 galaxies, showing its presence in well over half the galaxies
observed. The observations completed and no anomalies were noted.

1.8 Completed Eleven Sets of WF/PC-2 8090 (POMS Test Proposal: WF-II
Parallel Archive Proposal Continuation)

The WF/PC-2 was used in the parallel mode to make some low galactic
latitude archive observations. The program will be used to take parallel
images of random areas of the sky. The observations were executed as
scheduled, and no anomalies were noted.

1.9 Completed Two Sets of WF/PC-2 8445 (WF/PC-2 Cycle 8 Earth Flats)

The WF/PC-2 was used to make Cycle 8 Earth flat calibration
observations. This is to obtain sequences of earth streak flats to
construct high quality flat fields for the WF/PC-2 filter set. The
observations were executed as scheduled, and no anomalies were noted.

1.10 Completed WF/PC-2/STIS/CCD/MA1/MA2 8256 (Deep Helium-Mixing and
the Ultraviolet Spectra of Hot Horizontal Branch Stars)

The WF/PC-2 and The Space Telescope Imaging Spectrograph (CCD, MA1,
and MA2) were used to make observations of globular cluster NGC-6752 in
order to study the deep helium-mixing and the ultraviolet spectra of hot
horizontal branch stars. There is now good evidence that the luminosities
and gravities of hot horizontal branch stars in globular clusters are not
correctly described by canonical models of core helium- burning stars. A
wavelength calibration image was also taken. The observations were
executed as scheduled, and no anomalies were noted.

1.11 Completed STIS/CCD/MA1 8241 (A Snapshot Survey of Interstellar
Absorption Lines)

The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make high resolution Echelle spectrographic observations of the standard
ultraviolet star HD152590 as part of a snapshot survey of interstellar
absorption lines. A wavelength calibration image was also taken. The
observations were executed as scheduled, and no anomalies were noted.

1.12 Completed Two Sets of STIS/CCD 8228 (The Black Hole Versus Bulge
Mass Relationship in Spiral Galaxies)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the galaxies NGC-3521 and NGC-5364 in order to study the
black hole versus bulge mass relationship in spiral galaxies. A wavelength
calibration image was also taken. The observations were executed as
scheduled, and no anomalies were noted.

1.13 Completed STIS/CCD 8340 (Probing the Kinematics of the Narrow-Line
Region in Seyfert Galaxies with Slitless Spectroscopy)

The Space Telescope Imaging Spectrograph (CCD) was used to perform
studies of the gas kinematics of the narrow-line regions in Seyfert
galaxies. Previous studies indicate complex velocity fields, with evidence
for both gravitational and non-gravitational forces. The proposal
completed nominally.

1.14 Completed Two Sets of WF/PC-2 8216 (T Tauri Star Snapshot Survey
II. Completing the CTTs Sample)

The WF/PC-2 was used to make observations of the T-Tauri class
stars known as V376-CAS and SZ-111 as part of Snapshot Survey II. This
database will be of fundamental importance to understanding the nature of
planet-forming environments and their frequency in the galaxy. The
observations were executed as scheduled, and no anomalies were noted.

1.15 Completed WF/PC-2 8322 (The Distance to NGC 2841: Improving the TF
Calibration and Definitively Testing MOND)

The WF/PC-2 was used to measure a distance to the spiral galaxy NGC
2841 using Cepheid variables. NGC 2841 provides a unique opportunity to
simultaneously probe three separate phenomenon in extragalactic astronomy:
1} It will provide the highest rotational velocity data point for the
Cepheid based calibration of the I-band Tully-Fisher relation and thus will
firmly determine if this relation experiences curvature or remains linear
all the way out to high rotational velocities. 2} It has hosted two SN Ia
events; both of which have good photometry {1957A and 1972R}- this
significantly adds to the number of calibrators for the SN Ia distance
scale; 3} If its distance can be shown to be significantly less than 19.5
MPC, then MOND can be definitively ruled out because NGC 2841 will require
a value of a_o substantially in excess of the empirically determined
"universal" value. The observations completed nominally.

1.16 Completed WF/PC-2 8251 (The Second-Parameter Effect in Metal-
Rich, Globular Clusters: A Snapshot Study of NGC 6441)

The WF/PC-2 was used to observe the newly- discovered hot
horizontal branch (HB) populations in the metal-rich globular clusters (GC)
NGC 6441 providing an unique opportunity for unraveling the
second-parameter effect. While it has long been known that at least one
parameter besides the metallicity, Fe/H, determines the HB morphology of
GCs, our ignorance as to the nature of this second parameter {or
parameters} has been a major stumbling block in understanding the formation
history and age of the GC system. The proposal completed nominally with no
reported problems.

1.17 Completed STIS/CCD/MA2 8421 (Spectroscopic Sensitivity for (MAMA
and) CCD)

The Space Telescope Imaging Spectrograph (CCDand MA2) was used to
perform basic sensitivity measurement for some supported (MAMA and) CCD
spectroscopic modes. Sensitivity measurements are done for a few primary
tilts of the gratings. The proposal completed nominally, with no reported
problems.

1.18 Completed WF/PC-2 8242 (Imaging of Dust Structures and Star
Formation in the Disk-Halo Interface of Spiral Galaxies)

The WF/PC-2 was used to obtain images of five edge-on spirals to
study star formation and dusty interstellar clouds in the disk-halo
interface of these galaxies. The proposal completed with no reported problems.

1.19 Completed STIS/CCD 8226 (Discerning the Origins of Blue
Stragglers: Masses and Rotation Rates)

The Space Telescope Imaging Spectrograph (CCD) was used to study
the blue stragglers in globular cluster NGC-104-BSS. Conventional wisdom
holds that the masses of Blue Straggler Stars in globular clusters are
significantly larger than the turnoff mass. A wavelength calibration
observation was also taken. The observations were executed as scheduled,
and no anomalies were noted.

1.20 Completed WF/PC-2 8059 (POMS Test Proposal: Targeted Parallel
Archive Proposal)

The WF/PC-2 was used to observe the parallel opportunities
available in the neighborhood of bright galaxies are treated in a slightly
different way from the normal pure parallels. Local Group galaxies offer
the opportunity for a closer look at young stellar
populations. Narrow-band images in F656N can be used both to identify
young stars via their emission lines, and to map the gas distribution in
star-forming regions. The observations completed nominally.

1.21 Completed STIS/CCD/MA1/MA2 8245 (Black Hole Accretion Outbursts in
Soft X- Ray Transients)

The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was
used to make observations of the optical and ultraviolet counterpart of a
soft X-ray outburst region from a black hole accretion disk. A wavelength
and a CCD flat calibration images were also taken. The observations were
executed as scheduled, and no anomalies were noted.

1.22 Completed STIS/MA2 8275 (Ultraviolet Snapshots of 3CR Radio Source
Counterparts at Low Z)

The Space Telescope Imaging Spectrograph (MA2) was used to make
ultraviolet snapshot observations of the radio galaxy 3C270.0. Radio
galaxies are an important class of extragalactic objects, representing one
of the most energetic astrophysical phenomena, while extraordinarily useful
as probes of their environments and of the early Universe. The
observations were completed as scheduled, and no anomalies were reported.

1.23 Completed FGS 8334 (HD 98800: An Opportunity to Measure True
Masses for Low-Mass PMS Stars)

The Fine Guidance Sensors were used to make astrometric
observations of the low mass pre-main sequence (PMS) star HD98800 in order
to measure its true mass. HD 98800 became interesting when IRAS found it
to have a large infrared excess, indicating a substantial dust disk. The
observations were executed as scheduled, and no anomalies were noted.

1.24 Completed FGS 8463 (Long Term Stability of FGS1R in Transfer Scan
Mode)

The Fine guidance Sensors were used to make astrometric
observations of star UPGREN69 and several other reference stars in order to
study the long term stability of FGS-1R in the Transfer Scan Mode. The
observations were executed as scheduled, and no anomalies were noted.

1.25 Completed WF/PC-2 8390 (Expansion Parallax Distances to Planetary
Nebulae)

The WF/PC-2 was used to make observations of the planetary nebula
BD+30-3639 in order to study its parallax distance. The largest impediment
to our understanding of planetary nebulae is the lack of reliable
distances. The observations were executed as scheduled, and no anomalies
were noted.

1.26 Completed WF/PC-2 7470 (A Snapshot Survey of Galactic Globular
Clusters)

The WF/PC-2 was used to make snapshot survey observations of the
crowded center of the galactic globular cluster NGC-6380. The resulting
color-magnitude diagram will include all stars down to about one magnitude
below the main-sequence turnoff. The observations were completed as
scheduled, and no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 29
Successful: 29

Scheduled Re-acquisitions: 18
Successful: 18

2.2 FHST Updates:
Scheduled: 63
Successful: 63

2.3 Operations Notes:

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

There was a STIS EMC retry at 063/222805Z. The STIS flight
software error counter was cleared at 063/2322Z as directed by ROP NS-12.

The NICMOS FPA temperature sensor for detector 3 was enabled at
064/2003Z.

Per ROP IC-2, SSA transmitter #1 was turned on and off at 065/2258Z.

The Science Mission Specification for the week beginning early this
morning was re-processed over the weekend in order to insert a Target of
Opportunity that will observe a gamma ray burst with the STIS instrument
from 066/0432Z until 066/1154Z. Due to the pointing and new data
requirements of this late addition, fifteen TDRSS scheduling changes were
successfully processed.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW