Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_99/hst_status_01_04_99 Дата изменения: Mon Jan 4 15:15:54 1999 Дата индексирования: Sun Dec 23 10:59:50 2007 Кодировка: Поисковые слова: m 31

HUBBLE SPACE TELESCOPE

DAILY REPORT #2278

PERIOD COVERED: 0000Z (UTC) 12/30/98 - 0000Z (UTC) 01/04/99

Daily Status Report as of 004/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Sixty-One 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, and no
anomalies were noted.

1.2 Completed Ten 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.

1.3 Completed Thirteen 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, and no anomalies were noted.

1.4 Completed Two Sets of WF/PC-2 6356 (SNAPSHOT Survey of Ultraluminous
Infrared Galaxies)

The WF/PC-2 was used to make observations of galaxies Gal-065610 and
GAL-062652 as part of a survey of ultraluminous infrared galaxies. The
nature of ultraluminous infrared galaxies has generated considerable
controversy. The two main issues are: {1} are they powered by violent
bursts of star formation or by hidden quasars? {2} are interactions and
mergers invariably involved? The observations were executed as scheduled,
and no anomalies were noted.

1.5 Completed Twenty-One Sets of STIS/CCD 8091 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation III)

The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude, non-scripted, parallel observations. The observations
were completed as planned, and no anomalies were noted.

1.6 Completed WF/PC-2 6596 (Formation of Stellar Systems in Mergers in a
Compact Group of Galaxies)

The WF/PC-2 was used to make observations of the compact group of
galaxies NGC-7318 in order to study the formation of stellar systems in
active mergers. This detailed study will enable an evaluation of how
environmental conditions influence the nature of the stellar systems to be
formed and an assessment of the contribution of tidal dwarf formation to
the overall population of dwarf galaxies. The observations were executed
as scheduled, and no anomalies were noted.

1.7 Completed Eighteen Sets of NIC/1/2/3 8083 (FLATs: Warming Up -
continuation)

The Near Infrared Camera (Cameras One, Two and Three) was used to
monitor the flat fields 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 executed as scheduled, and no
anomalies were noted.

1.8 Completed NIC/2/3 8082 (NICMOS Pure Parallel Fall 98)

The Near Infrared Camera (Cameras Two and Three) was used to make
pure parallel observations while another instrument is prime. The
observations were executed as scheduled, and no anomalies were noted.

1.9 Completed Fourteen Sets of STIS/CCD 8084 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation)

The Space Telescope Imaging Spectrograph (CCD) was used to make
non-scripted parallel high galactic latitude observations as part of POMS
test proposal. The observations were executed as scheduled, and no
anomalies were noted.

1.10 Completed Three Sets of NIC/2/3 8063 (NICMOS Pure Parallel Sponge -
Backup)

The Near Infrared Camera (Cameras Two and Three) was used to make
observations taken in parallel with the prime science observations. This
proposal is PRE-the new FOM default. The observations were executed as
scheduled, and no anomalies were noted.

1.11 Completed Three Sets of WF/PC-2 7619 (WF/PC-2 Cycle 7 Decontamination)

The WF/PC-2 was used to conduct a Cycle 7 decontamination procedure.
Ultraviolet-blocking contaminants were removed, and hot pixels cured, by
warming the CCDs to +20C for 6 hours. A variety of internal images were
taken before and after the decontamination in order to verify its success
and to monitor the instrument health. The procedures were conducted as
scheduled, and no problems were reported.

1.12 Completed STIS/CCD 7303 (UV Spectroscopy of Wolf-Rayet-Type Central
Stars in the Magellanic Clouds)

The Space Telescope Imaging Spectrograph (CCD) was used to make
spectrograph observations of the nebula and Wolf-Rayet class stars in The
Large Magellanic Cloud (SMP61). Consistent modelling of the nebulae will
add further information about the evolutionary past of the central stars.
A wavelength calibration image was also taken. The observations were
completed as scheduled, and no anomalies were noted.

1.13 Completed Four Sets of WF/PC-2 7377 (Dwarf Elliptical Galaxy
Snapshot Survey II)

The WF/PC-2 was used to make observations of the dwarf elliptical
galaxies FCC25 and VCC666 as part of Snapshot Survey II. This survey will
provide important information on the globular cluster systems of such
galaxies and the properties of their cores and nuclei. The observations
were completed as planned, and no anomalies were reported.

1.14 Completed STIS/CCD 7475 (The Chemical Content of the Universe at Z<
1.6)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the background quasar Q1229-0207. Damped Lyman-Alpha
absorption systems provide a means of directly probing the chemical content
of the deep universe. A wavelength calibration image was also taken. The
observations were completed as planned, and no problems were reported.

1.15 Completed STIS/CCD/MA2 7756 (Density Diagnostics for the Dynamic
Atmospheres of LPV Stars)

The Space Telescope Imaging Spectrograph (CCD and MA2) was used to
make observations of the dynamic atmosphere of the LPV (Long Period
Variable) class star HD84748. The spectrum comparisons are fundamental in
the understanding of the mass loss in this critical stage of the star's
evolution. A wave length calibration image was also taken. The
observations were completed as planned, and no problems were reported.

1.16 Completed WF/PC-2 7623 (WF/PC-2 Cycle 7 Internal Flats)

The WF/PC-2 was used to make a set of internal Cycle 7 calibration
flats which are designed to monitor the pixel to pixel flat field response
and the visflat lamp degradation, as well as to detect any possible changes
due to contamination. The calibration observations were completed as
planned, and no problems were reported.

1.17 Completed Three Sets of WF/PC-2 6357 (The Nuclear Morphology of
Elliptical Galaxies)

The WF/PC-2 was used to make images of the early type, large,
elliptical galaxies NGC-2778, NGC-2872 and NGC-2592 (taken from a list of
150 galaxies) in order to study their nuclear morphology. This survey will
complement Illingworth's snapshot study of later Hubble types. The
observations were completed as scheduled, and no anomalies were reported.

1.18 Completed WF/PC-2 6659 (A Search For Superplanets Around Weak T-
Tauri Stars)

The WF/PC-2 was used to make observations in the 1 micron band of
the T-Tauri class star V826-Tau in order to search for superplanets. Weak
T-Tauri class stars are thought to have dissipated their circumstellar
disks recently, possibly by forming planetary systems. The observations
were completed as planned, and no anomalies were reported.

1.19 Completed WF/PC-2 6554 (Extragalactic Globular Cluster Systems)

The WF/PC-2 was used to make observations of a extragalactic
globular cluster system which is located in galaxy NGC-3311. This is part
of a survey which will cover a range in galaxy luminosity, morphological
type, environment, galactic cluster specific frequency and galactic
cluster mean metallicity. The observations were executed as scheduled, and
no anomalies were noted.

1.20 Completed WF/PC-2 7622 (WF/PC-2 Cycle 7 Internal Monitor)

The WF/PC-2 was used to make a set of Cycle 7 internal monitoring
calibration measurements. A variety of internal exposures are obtained in
order to provide a monitor of the integrity of the CCD camera electronics
in both bays {gain 7 and gain 15}, a test for quantum efficiency in the
CCDs, and a monitor for possible buildup of contaminants on the CCD
windows. A bias calibration and an internal flat calibration image were
also taken. The observations were executed as scheduled, and no anomalies
were noted.

1.21 Completed STIS/CCD/MA1 7737 (Low Redshift Lyman Alpha Forest
Clouds: Their Kinematics and Their Relation to Galaxies)

The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make spectrographic observations of background quasar QSO-123050 in order
to obtain foreground low redshifted Lyman-Alpha observations of the forest
clouds. We should be able to shed light on the question of whether the low
redshift Lyman-Alpha forest is related to galaxies or represents a truly
intergalactic phenomenon. A wave length calibration image was also taken.
The observations were completed as scheduled, and no anomalies were
reported.

1.22 Completed Four 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 high 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.

1.23 Completed Four Sets of WF/PC-2 8061 (POMS Test Proposal: WF-II
Backup Parallel Archive Proposal)

This is a POMS test proposal designed to simulate scientific plans.
The proposal was executed as planned, and no anomalies were reported.

1.24 Completed WF/PC-2 6496 (Nuclear Rings: Probing the Hearts of Barred
Galaxies)

The WF/PC-2 was used to make observations of the barred class galaxy
NGC-1326 in order to study its inner nuclear region and "Nuclear Rings"
structure. These small rings, less than 10'' in angular radius, are
thought to trace the location of the inner Lindblad resonance (ILR), a 2:1
orbital resonance with the bar that is of great importance to the structure
and evolution of disk galaxies. The observations were completed as
planned, and no anomalies were reported.

1.25 Completed NIC/2/3 7962 (NICMOS Warm-up Focus Monitoring)

The Near Infrared Camera (Cameras Two and Three) was used to make
observations of the globular cluster and nebula of NGC-3603 as part of the
NICMOS warm-up focus monitoring. This proposal is used to determine and
monitor the optimal focus settings for NIC/2 and NIC/3 during the dewar
warm-up period at the end of 1998. The observations were executed as
scheduled, and no anomalies were noted.

1.26 Completed WF/PC-2 6790 (Mass Determination of QSOs Using
Gravitational Lensing)

The WF/PC-2 was used to make observations of quasar Q1009-0252 as
part of a program to measure the mass of quasar using the gravitational
lensing effect. Only four pairs of quasars with different redshifts and
angular separations smaller than 5'' are presently known. The observations
were completed as planned, and no problems were reported.

1.27 Completed STIS/CCD/MA2 7433 (UV Spectral Dating of Galaxies)

The Space Telescope Imaging Spectrograph (MA2) was used to make
ultraviolet spectrographic observations of HD88737 to calculate a highly
accurate library of UV stellar spectra that can be used to estimate the age
and metallicity of galaxies of intermediate age {between 1 and 8 Gyrs}.
The critical step in this effort is to test the model spectra against
high-quality UV spectra of real stars. A wave length calibration image was
also taken. The observations were executed as scheduled, and no anomalies
were noted.

1.28 Completed STIS/MA1 7471 (STIS Snapshot Search for UV-bright High
Redshift Quasars)

The Space Telescope Imaging Spectrograph (MA1) was used to make
ultraviolet observations of the bright high redshifted quasar HS1248+710.
This quasar shows no signs of strong absorption in its optical spectra, and
its He-II Lambda 304 A0 line is accessible with HST. The observations were
executed as scheduled, and no anomalies were noted.

1.29 Completed FOC/96 7923 (FOC F/96 Turnon)

The Faint Object Camera (f/96) was used to take an internal flat and
a dark to ensure that the 30-day limit for the FOC is not exceeded. The
observations were executed as scheduled, and no anomalies were noted.

1.30 Completed STIS/CCD 7403 (Measuring Black Hole Masses in Broad-Lined
AGNs)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of broad-lined active galactic nuclei (AGN) located in galaxy
NGC-1052. Broad emission lines in AGNs are considered one of the most
direct signatures of a large central mass, which is presumed to be a black
hole. A wavelength calibration image was also taken. The observations
were completed as planned, and no anomalies were reported.

1.31 Completed S/C 5582 (FOC/48 Monthly Activation (Camera Section
Only): Cycle 4)

This proposal was executed as scheduled, and no anomalies were noted.

1.32 Completed FOC/96 6350 (FOC spectroscopy of BALQSOs)

The Faint Object Camera (f/96) was used to make ultraviolet
spectrographic images of BALQSO 0128-3647 which is known to show broad
emission lines from abundant ions. This will help us improve our knowledge
of these BAL class objects. The observations were executed as scheduled,
and no anomalies were noted.

1.33 Completed WF/PC-2 7465 (White Dwarf Distance and Precision Age for
Globular Clusters)

The WF/PC-2 was used to make observations of white dwarf star
WD1105-049 which is located in globular cluster 47-Tuc. The observed
cooling sequences for the clusters is to be fit to the corresponding FCSs
(Fiducial Cooling Sequences) to determine accurate cluster distance moduli
and absolute ages. The observations were executed as scheduled, and no
anomalies were noted.

1.34 Completed WF/PC-2 7468 (Young Globular Clusters in Merger Remnants
-- Part 4)

The WF/PC-2 was used to make observations of merging galaxy NGC-2865
to study its globular clusters. Mergers seem to have played a major role
in determining the shapes and dynamics of E and S0 galaxies. The
observations were executed as scheduled, and no anomalies were noted.

1.35 Completed WF/PC-2 6776 (A Comparative HST Imaging Study of Radio
Galaxies and Hosts)

A clear understanding of the nature of the host galaxies of
radio-quiet quasars, radio-loud quasars and radio galaxies is of central
importance in any attempt to unify and relate the three main classes of
powerful active galaxies. Existing HST studies of quasar hosts, whilst
producing many interesting new results, have yielded surprisingly little
hard information on the properties of the hosts themselves. This imaging
study using the WF/PC-2 will remedy this situation by undertaking redder,
line-free observations of AGN 1215+013. The proposal completed with no
reported problems.

1.36 Completed WF/PC-2 7618 (WF/PC-2 Cycle 7 Photometric Monitor UV/OPT STD)

The WF/PC-2 was used to make observations of the standard star
GRW+70D582 as part of a Cycle 7 photometric monitoring program. This
ultraviolet spectrophotometric standard star was observed in a variety of
filters and cameras to monitor the photometric stability and quantum
efficiency of WF/PC-2 from the far-ultraviolet to near-infrared. The
observations were completed as scheduled, and no problems were reported.

1.37 Completed STIS/CCD/MA2 7748 (The Origins of Boron)

The Space Telescope Imaging Spectrograph (CCD and MA2) was used to
make observations of the star BD-06D1250 which is part of the Orion OB1
class association in order to study the origins of Boron. The youngest
stars show higher oxygen abundances than the oldest stars. The
observations were completed as planned, and no problems were reported.

1.38 Completed STIS/CCD/MA1/MA2 7673 (STIS MAMA Sensitivity and Focus
Monitor)

The Space Telescope Imaging Spectrograph (CCD/MA1/MA2) was used to
make observations of standard star GRW+70D582 in order to perform a MAMA
sensitivity and focus monitoring program. This is to monitor sensitivity
of each MAMA grating mode to detect any change due to contamination or
other causes. The observations were executed as scheduled, and no
anomalies were noted.

1.39 Completed FGS 7679 (Intermediate Plate Scale Calibration (FGS-3))

The Fine Guidance Sensors (FGS-3) was used to make observations of
stars 4727-25, HD65949 and several other reference stars in order to
completed an intermediate plate scale calibration. The essential point of
this calibration is to refine our knowledge of the plate scale in the
central region of the astrometer FGS for this is where all annual parallax
work will be executed by the GOs and GTOs. The observations were executed
as scheduled, and no anomalies were noted.

1.40 Completed 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 (a.k.a., M-31). This is to study A and B supergiant stars in M-31
and M-33 with a precision far exceeding that of existing ground-based
estimates. The observations were completed as planned, and no problems
were reported.

1.41 Completed STIS/CCD 7912 (STIS Parallel Archive Proposal - Nearby
Galaxies - Imaging and Spectroscopy)

The Space Telescope Imaging Spectrograph (CCD) was used to make
parallel observations of nearby galaxies. This survey will be useful to
study the star formation histories, chemical evolution, and distances to
these galaxies. These data will be placed immediately into the Hubble Data
Archive. The observations were completed as scheduled, and no problems
were reported.

1.42 Completed WF/PC-2 6675 (The Evolution of Galaxies in Groups)

The WF/PC-2 was used to make observations of the radio galaxy 3C16.
There is now convincing evidence that galaxy evolution has progressed as a
strong function of the environment. The strongest evolution is seen in the
cores of rich clusters. The observations were completed as planned, and no
anomalies were reported.

1.43 Completed WF/PC-2 6967 (Blue Continuum Snapshots of 3CR Radio -
Continued Galaxies)

The WF/PC-2 was used to make observations of the radio galaxies
3C323.0. Radio galaxies are an important class of extragalactic objects:
they represent one of the most energetic astrophysical phenomena; they may
be used as probes of their environments; and they are unique probes of the
early Universe. The observations were completed as planned, and no
problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 34
Successful : 34

Scheduled Reacquisitions : 44
Successful : 44

2.2 FHST Updates:

Scheduled : 84
Successful : 84

2.3 Operations Notes:

Using ROP SR-1, the SSR EDAC error counter was cleared 15 times.

The VDS became inoperable at 365/17125Z. Service was restored at
365/1755Z.

ESTR-3 was reconditioned at 002/0703Z.

An SI C&DH error was reset at 002/0422Z per ROP NS-5.

HSTAR 6847 was written to document NICMOS dewar temperatures going
out of limits at 002/105954Z. The value for each was approximately 61.6
degrees K. These mnemonics have been steadily increasing. Per an
operations note, four temperature limits were raised. A day later, the
values began reporting values in the range of 64 degrees K. The limits
were again raised. Analyses indicate that this is probably the warm-up
period for the end of the cyrogen.

A TTR was written for data hits and missing minor frames during a
TDW support at 003/1812Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH