Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_97/hst_status_06_23_97 Дата изменения: Mon Jun 23 15:38:27 1997 Дата индексирования: Sun Dec 23 10:50:19 2007 Кодировка: Поисковые слова: ngc 3982

HUBBLE SPACE TELESCOPE

DAILY REPORT #1904

PERIOD COVERED: 0000Z (UTC) 06/20/97 - 0000Z (UTC) 06/23/97

Daily Status Report as of 174/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Sixteen Sets of WF/PC-2 6194 (WF/PC-2 Cycle 5:
Polarization Proposal)

The WF/PC-2 was used to make polarization observations of star
BD+64D106 at four different spacecraft roll angles. This should permit a
detailed and independent calibration of each polarizer quad. The
observations were executed as scheduled, and no anomalies were noted.

1.2 Completed WF/PC-2 6677 (The Origin of the X-Ray Background: What are
the Faintest X-Ray Galaxies?)

The WF/PC-2 was used to make observations of the galaxy Gal-133500
which is from the deepest optically identified (ROSAT) X-ray survey yet.
These images were taken to determine the morphologies of the remaining
systems which we cannot study from the ground to determine whether the
remaining non-QSO XRB might be explained by emission from interacting or
disturbed spirals. The observations were completed as planned, and no
anomalies were reported.

1.3 Completed NIC/1/2/3 7701 (NICMOS Short One Orbit Parallel)

The Near Infrared Camera (Cameras One, Two and Three) was used as
part of a short NICMOS one orbit parallel program, to obtain "JHK" imaging
of sky regions when another instrument is prime. The observations were
completed as scheduled, and no anomalies were reported.

1.4 Completed WF/PC-2 6832 (Imaging of a Protogalaxy at Z=2.7 Discovered
by its Young Stellar Population)

The WF/PC-2 was used to make observations of the disk-like
protogalaxy MS1512+37 which is located at a red shift of Z=2.7, and which
was discovered due to its young stellar population. It has a strong
absorption line spectrum indicative of young O, B, and A stars. The
observations were executed as scheduled, and no anomalies were noted.

1.5 Completed Four Sets of WF/PC-2 6909 (WF/PC-2 Cycle 6 Calibration:
Earth Flats)

The WF/PC-2 was used to make observations of the bright Earth to
obtain streak flats which are used to construct high quality flat fields
for the WF/PC-2 filter set. The observations were executed as scheduled,
and no anomalies were noted.

1.6 Completed Two Sets of STIS/CCD 7107 (STIS CCD Hot Pixel Annealing)

The Space Telescope Imaging Spectrograph (CCD) was run though an
annealing process. A bias and a dark calibration image were also taken.
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. In addition, CTE
performances are examined by looking for traps in a low signal level flat.
The observations were executed as scheduled, and no anomalies were noted.

1.7 Completed Two Sets of NIC/1/2/3 7703 (NICMOS MULTIACCUM Dark
Characterization 1/8)

The purpose of this proposal is to obtain group 1 of the on-orbit
darks for the MULTIACCUM predefined sequences requested by GOs, before the
start of Cycle 7. The observations completed with no reported problems.

1.8 Completed Four Sets of STIS/MA1 7086 (STIS22MB STIS Slit to Detector
Internal Stability - MAMA - Part 2)

The Space Telescope Imaging Spectrograph (MA1) was used to make
slit-to-detector internal stability calibration observations. This was to
determine the stability of the spectrograph to thermal variations in the
MAMA modes. A dark calibration image was also taken. The observations
were executed as scheduled, and no anomalies were noted.

1.9 Completed NIC/2 7330 (The Fueling of Active Nucleii: A NICMOS
Snapshot Survey)

The Near Infrared Camera (Camera Two) was used to probe the dark
matter distribution of NGC-4593 and NGC-3982, far from their centers, by
observing intervening absorption from the MgII doublet (lambda 2800) in the
spectrum of one background QSO located in a geometrically optimal position.
HST observations are required because this feature is in a wavelength range
not accessible from the ground, and the QSO magnitudes and expected
strength of absorption make IUE observations unfeasible. The proposal
completed as expected with no anomalies.

1.10 Completed WF/PC-2 6673 (Black Holes and Gas Disks in a Complete
Sample of Radio Loud UGC Ellipticals)

The WF/PC-2 was used to make observations of radio load, elliptical
galaxy UGC-1413in order to search for a possible black hole and gas disk.
Hydrogen-Alpha and broad band observations were taken to determine the
luminosity profiles and stellar populations (on the tens of parsec scale),
to and detect nuclear regions or disks of gas and dust. The observations
were completed as planned, and no anomalies were reported.

1.11 Completed Eight Sets of STIS/CCD 7675 (STIS Non-Scripted Parallel
Archive Proposal)

The Space Telescope Imaging Spectrograph (CCD) was used in the
parallel mode to obtain slitless spectroscopy with the G750L grism to
search for emission line galaxies at intermediate to high redshift. The
observations were completed as planned, and no anomalies were reported.

1.12 Completed NIC/2 7331 (Near-IR Properties of the Bulges of Spiral
Galaxies)

The Near Infrared Camera (Camera Two) was used to make infrared
observations of the bulge in spiral galaxy NGC-488. Near-IR data at HST
resolution are essential for correcting for the effect of dust and will
enable us to derive robust nuclear properties for the sample. The
observations were executed as scheduled, and no anomalies were noted.

1.13 Completed FOC/96 6570 (High-Redshift Galaxies and Their
Contribution to the Ionizing Background)

The Faint Object Camera (f/96) was used to make ultraviolet
objective-prism spectroscopy observations of the high-redshifted galaxy
GAL-CFRS-1 in order to study its contribution to the ionization background,
and to study its ultraviolet spectral energy distribution from shortward of
the Lyman limit to longward of Lyman-alpha. The observations were executed
as scheduled, and no anomalies were noted.

1.14 Completed WF/PC-2 7202 (The WF/PC-2 B Band Parallel Survey: A
Systematic and Synoptic Study of Galaxy Formation and Evolution - Short
Orbit Case)

The WF/PC-2 was used to make observations as part of a B-Band Survey
to make a synoptic study of galaxy formation and evolution. These
observations were taken in parallel with the prime science observations.
They were completed as planned, and no anomalies were reported.

1.15 Completed STIS/MA1/MA2 7064 (STIS SMOV MAMA Contamination Monitor)

The Space Telescope Imaging Spectrograph (MA1/MA2) was used to make
observations of the flux from standard star GRW+70D582 in order to monitor
for any gross changes over time that might indicate contamination. The
observations were completed as planned, and no anomalies were reported.

1.16 Completed Three Sets of WF/PC-2 7553 (Pure Parallel Archive Survey II)

WF/PC-2 parallel observations were obtained in the ultraviolet in
search for interesting objects. This program is designed to find
extragalactic sources with near ultraviolet excesses (3000 A0) outside the
galactic plane and far ultraviolet sources (1600 A0) in the galactic plane.
The procedure was executed as scheduled, and no anomalies were reported.

1.17 Completed STIS/MA1 7078 (STIS18M Spectroscopic Mode Image Quality -
MAMA)

The Space Telescope Imaging Spectrograph (MA1) was used to examine
the spectroscopic quality across the entire detector for the primary
spectroscopic modes and establish whether changes occurred during launch.
The observations were completed as scheduled, and no anomalies were
reported.

1.18 Completed WF/PC-2 7588 (Measuring Q0 With Type IA Supernovae)

The WF/PC-2 was used to make observations of supernova SN1997A3 in
order to measure the Q0 parameter. This is to produce a precise Hubble
diagram which can be used to measure the cosmic deceleration and global
curvature of the universe. HST can make an essential contribution by
providing photometry with substantially higher precision and better
temporal coverage than can be obtained from the ground. The observations
were executed as scheduled, and no anomalies were noted.

1.19 Completed WF/PC-2 6756 (Measuring Proper Motions of Galactic
Microlenses)

The WF/PC-2 was used to make astrometric proper motion measurements
of STAR-1807 as part of a study of galactic microlensing. This is an epoch
image of a recently discovered microlensing event which is located near the
galactic bulge. The observations were completed as scheduled, and no
problems were reported.

1.20 Completed Two Sets of NIC/2 7498 (NICMOS Imaging Survey of Distant
Radio Galaxies. Ellipticals at Z > 2 ?)

The Near Infrared Camera (Camera Two) was used to make high
resolution and high signal-to-noise ratio imaging survey observations of
the radio galaxies USS2202+12 and MRC0324-22. The existence and
photometric properties of massive elliptical galaxies at high redshift
provide a powerful probe of galaxy evolution. The observations were
executed as scheduled, and no anomalies were noted.

1.21 Completed WF/PC-2 5914 (The Formation History of Globular Clusters
in M-33)

The WF/PC-2 was used to make V and I observations of globular
cluster NGC-598 (U49) which is located in the M-33 galaxy in order to study
its formation history. Color-magnitude diagrams made from these images
will be examined for evidence of a parameter other than metallicity that
influences the evolutionary development of stars. The observations were
executed as scheduled, and no anomalies were noted.

1.22 Completed WF/PC-2 7450 (The Formation of Bulges of Spiral Galaxies:
Central Visual-Infrared Color Gradients)

The WF/PC-2 was used to make observations of the bulge in spiral
galaxy NGC-5389 in order to obtain high-resolution optical and near
infrared images for a complete survey sample of bulges of spiral galaxies.
The observations were completed as scheduled, and no anomalies were
reported.

1.23 Completed WF/PC-2 6004 (Direct Measurement of the Mass Distribution
in the Rich Cluster Abell 1689)

The WF/PC-2 was used to make very deep observational exposures of
the rich galactic cluster, Abell 1689, in order to make direct measurements
of its mass distribution. The goal is to use the images of the blue,
background galaxies that are distorted by the gravitational field of Abell
1689 and to map the distribution of the mass in the cluster. The
observations were completed as planned, and no anomalies were reported.

1.24 Completed STIS/CCD 7160 (CCD Performance Following Reconfiguration)

The Space Telescope Imaging Spectrograph (CCD) was used to evaluate
the CCD performance following reconfiguration. To avoid loss of science
data due to particle-induced CCD resets during passage through the SAA, the
CCD is reconfigured after each SAA passage. Dark and bias calibration
observations were also taken. The observations were completed as
scheduled, and no problems were reported.

1.25 Completed WF/PC-2 7203 (Cosmology with the Medium-Deep Survey -
Short Orbit Cases)

The WF/PC-2 was used to take short (about 20-minute) exposures, to
be taken in parallel with the prime science observations, using the I
filter. These exposures are part of the medium-deep survey, which
emphasizes exposures that will be useful in obtaining cosmological
parameters. The observations were completed as planned, and no problems
were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 16
Successful : 16

Scheduled Reacquisitions : 27
Successful : 27

2.2 FHST Updates:

Scheduled : 39
Successful : 39

2.3 Operations Notes:

On DOY 172 (Saturday, June 21) at 1921 GMT, the STIS MAMA-1 Main
Control Electronics (MCE) experienced an erroneous reset outside of the
SAA. At this time, the STIS was not observing (both high voltages were
off) as it was transiting a series of SAA orbits and was approximately 23
minutes away from the next SAA, contour level 4. The MCE was recovered
nominally on DOY 173 using baselined procedures. The STIS error log was
dumped, the MCE was cleared, and the flag to enable commanding of MAMA-1
was re-enabled. The next series of STIS observations were scheduled for
DOY 174 at 1033 GMT for MAMA-1 and had just begun when this report was
written. No STIS observations were lost due to this anomaly.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science and SMOV operations.

/DMH