Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_97/hst_status_11_24_97 Дата изменения: Mon Nov 24 19:36:41 1997 Дата индексирования: Sun Dec 23 10:53:14 2007 Кодировка: Поисковые слова: ngc 6251

HUBBLE SPACE TELESCOPE

DAILY REPORT #2010

PERIOD COVERED: 0000Z (UTC) 11/21/97 - 0000Z (UTC) 11/24/97

Daily Status Report as of 328/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Three Sets of STIS/CCD 7802 (Daily Darks to Update
Acquisition Bad Pixel Table)

The Space Telescope Imaging Spectrograph (CCD) was used to make
calibration observations to obtain daily darks to update the acquisition
bad pixel table. These darks are intended to identify hot pixels for
update to the acquisition on-board FSW hot pixel table. Daily hot pixel
lists can also be used for science data analysis. The observations were
executed as scheduled, and no anomalies were noted.

1.2 Completed Four Sets of STIS/CCD 7782 (STIS Non-Scripted Parallel
Archive Proposal - Half Orbit)

The Space Telescope Imaging Spectrograph (CCD) was used for a
non-scripted parallel archive proposal (one-half orbit). The observations
were executed as scheduled, and no anomalies were noted.

1.3 Completed Seven Sets of NIC/2/3 7811 (NICMOS Modified One Orbit
Parallel)

The Near Infrared Camera (Cameras Two and Three) was used to obtains
"JH" imaging, and G096 and G141 spectroscopy of sky regions when another
instrument is prime. The second iteration of this proposal may have been
affected by the acquisition defaulting to fine lock on FGS-3 only reported
in the previous report. Otherwise, the observations were completed as
planned, and no further anomalies were reported.

1.4 Completed Six Sets of WF/PC-2 7621 (WF/PC-2 Cycle 7 Supplemental
Darks PT1/3)

The WF/PC-2 was used to make supplemental dark calibration images.
This set of calibrations is intended to obtain three dark frames every day
to provide data for monitoring and characterizing the evolution of hot
pixels. The observations were executed as scheduled, and no anomalies were
noted.

1.5 Completed Two Sets of NIC/2 7219 (Ultraluminous Infrared Galaxies)

The near Infrared Camera (Camera Two) was used to make observations
of the ultraluminous infrared galaxy IC883. The luminous IRAS galaxies are
probably powered by nuclear starbursts and/or central AGNs; many of these
systems exhibit evidence of recent galactic interaction or merging. The
observations were completed as planned, and no problems were reported.

1.6 Completed Thirteen Sets of WF/PC-2 7786 (Pure Parallel Archive
Survey - Continuation)

The WF/PC-2 was used to make observations as part of an archival
survey program in which the images were taken in parallel with the prime
science observations. These WF/PC-2 parallel observations were obtained in
the ultraviolet in a search for interesting objects. The second iteration
of this proposal may have been affected by the acquisition defaulting to
fine lock on FGS-3 only reported in the previous report. Also, as
described in 2.1, the acquisiton for the twelfth iteration defaulted to
fine lock on FGS-1 only. Otherwise, the observations were completed as
planned, and no further problems were reported.

1.7 Completed STIS/CCD 7391 (NGC 2363 V1: A Rare Case of Major LBV Eruption)

The Space Telescope Imaging Spectrograph (CCD) was use to make
images of NGC-2363 which contains a rare case of major luminous blue
variable (LBV) eruption. Only a handful of major LBV eruptions have been
observed, including those of P Cygni in the 17^th century and Eta Carina
between 1840 and 1860. A wavelength calibration image was also taken.
This proposal may have been affected by the acquisition defaulting to fine
lock on FGS-3 only reported in the previous report. Otherwise, the
observations were executed as scheduled, and no further anomalies were
noted.

1.8 Completed Eight Sets of NIC/2/3 7812 (NICMOS Modified Short One
Orbit Parallel)

The Near Infrared Camera (Cameras Two and Three) was used to obtains
"JH" imaging of sky regions when another instrument is prime. Two dither
positions are obtained for each filter. The observations were completed as
scheduled, and no anomalies were reported.

1.9 Completed WF/PC-2 6491 (The Optical Structure and Environments of
Z~1 3CR Quasars)

The WF/PC-2 was used to make observations of radio galaxy/ quasar
3C186 in order to study its optical stricture and environments. This
should obtain better statistics on correlations seen in the Cycle 4 data,
such as the association of linear galaxies with other 3CR galaxies and
quasars. The observations were executed as scheduled, and no anomalies
were noted.

1.10 Completed STIS/CCD 7783 (STIS Parallel Science)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations taken in parallel with the prime science. The observations
were completed, and no problems were reported.

1.11 Completed NIC/2 7230 (Dust Embedded Black Holes/AGN in Nearby Galaxies)

The Near Infrared Camera (Camera Two) was used to make observations
of the AGN located in the nearby (i.e., 6.4 Mpc) spiral NGC-4258 galaxy.
The spin axis is at 119 degrees to that of the host spiral, but nearly
parallel to jets seen in H-Alpha and the radio continuum. The observations
were executed as scheduled, and no anomalies were noted.

1.12 Completed Two Sets of NIC/2 7495 (Survey of Gravitational Lenses as
Cosmological Tools)

The Near Infrared Camera (Camera Two) was used to make survey
observations of objects Q1208+101 and HE1104-180 by obtaining deep,
high-resolution images in the optical and near IR in order to see if they
are gravitational lenses and could be used as a cosmological tool. The
observations were executed as scheduled, and no anomalies were noted.

1.13 Completed STIS/CCD 7711 (STIS CCD G750L Fringing Flats.)

The Space Telescope Imaging Spectrograph (CCD) was used to
investigate and monitor the STIS CCD flat-field fringing in the G750L
grating at its nominal wavelength setting {7751A}. WAVECALs were also
taken at the same gain and wavelength setting. Typical S/N = 100 for each
integration, and gain = 4 on each. The observations were executed as
scheduled, and no anomalies were noted.

1.14 Completed Two Sets of NIC/1/2 7180 (Surface and Atmospheric
Features on Titan)

The Near Infrared Camera (Cameras One and Two) was used to make high
resolution infrared observations of the surface and atmospheric features on
Saturn's moon Titan. The primary objective is to measure the wavelength
dependence of discrete surface features to investigate possible
compositional heterogeneity of Titan's surface. The observations were
executed as scheduled, and no anomalies were noted.

1.15 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 V838-Her 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.

1.16 Completed STIS/MA1/MA2 7657 (STIS Spectroscopic and Imaging
Sensitivity, MAMA)

The Space Telescope Imaging Spectrograph (MA1 and MA2) was used to
make observations of GD71 in order to study the spectroscopic and imaging
sensitivity. Sensitivity measurements are done for all primary tilts of
the gratings and the prism used with the MAMAs, except for the G140L and
G230L gratings. Imaging sensitivity measurements are done with all
apertures, including a neutral density filter. A wavelength and a dark
calibration images were also taken. The observations were executed as
scheduled, and no anomalies were noted.

1.17 Completed Two Sets of WF/PC-2 7625 (WF/PC-2 Cycle 7 Earth Flats)

The WF/PC-2 was used to make a series of Earth flat calibration
images. 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 observations were completed
as planned, and no anomalies were reported.

1.18 Completed Two Sets of WF/PC-2 6802 (Cosmology With the Medium Deep
Survey)

The WF/PC-2 was used to make observations taken in parallel with the
prime science observations as part of the Medium Deep Sky Survey. The
observations were executed as scheduled, and no problems were reported.

1.19 Completed FGS 6486 (Orbits of Pre-Main Sequence Binaries)

The FGSs were used in the TRANS mode to make astrometric
observations of the per-main sequence, binary star system ELIAS-12 in order
to help compute its orbital parameters. The observations will be used to
make orbital maps of T-Tauri class stars. From these orbital parameters
they will be able to derive the first reliable mass measurements for low
mass pre-main sequence stars. The observations were completed as
scheduled, and no anomalies were reported.

1.20 Completed Two Sets of WF/PC-2 6659 (A Search For Superplanets
Around Weak T- Tauri Stars)

The WF/PC-2 was used to make observations in the one micron band of
the T-Tauri class star STAR0437+2 and HB397 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.

1.21 Completed FGS 7678 (Monitor the Long-Term Stability of FGS-1R)

The goal of these measurements is to monitor the internal positional
stability of the FGSs by measuring many stars in the M35 check field
repeatedly over a one year period. The results of these measurements are
the stability characteristics of the FGS to allow an estimate of
differential corrections to OFAD and Plate Scale. The observations were
completed as planned, and no problems were reported.

1.22 Completed Three Sets of NIC/2 7228 (Imaging and Polarimetry of YSO'S)

The Near Infrared Camera (Camera Two) was used to investigate the
young stellar objects (YSO) HL-Tau, RE5ON-1,2,3 and LKHA198-1 with
coronagraphic imaging, polarimetry, and line imaging. During this
proposal, the acquisition defaulted to fine lock on FGS-1 only. Otherwise,
the observations were completed as planned, and no further problems were
reported.

1.23 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-1365 far from the center 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.

1.24 Completed WF/PC-2/NIC/1/2/3 7257 (An Unbiased Redshift Survey of
Ultra-Faint Galaxies)

The WF/PC-2 and the Near Infrared Camera (Cameras One, Two and
Three) were used to make observations of the ultra-faint galaxy AC114 as
part of an unbiassed redshift survey. Near-infrared observations of these
types of objects will provide a robust estimate of the luminosity density
in the distant universe, an important constraint on theories of galaxy
formation. The observations were completed as planned, and no problems
were reported.

1.25 Completed STIS/CCD 7354 (Kinematics of Gaseous Disks in the Nuclei
of Liners with Compact Flat Spectrum Radio Sources)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the nuclei of the liner in the compact flat spectrum source
galaxy NGC-1497. Many active galactic nuclei channel energetic particles
into jets that feed powerful extended lobes of radio emission; others
remain quite compact. Both classes of active galaxies are suspected to be
powered gravitationally by the accretion of surrounding material onto a
massive black hole. The observations were completed as planned, and no
problems were reported.

1.26 Completed Two Sets of NIC/1 7451 (Gravitational Lensing by Damped
Ly-Alpha Absorbers)

The Near Infrared Camera (Camera One) was used to make observations
of object PB3977 in order to study gravitational lensing in damped
Lyman-Alpha absorbers. Damped Lyman-Alphas are thought to arise in the
disk of the progenitors of present-day spiral galaxies. The observations
were completed as scheduled, and no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 25
Successful : 25

Per HSTAR 6251, the acquisition scheduled at 327/191517Z defaulted
to fine lock on FGS-1 only. Proposals detailed in 1.6 and 1.22 may have
been affected.

Scheduled Reacquisitions : 22
Successful : 22

2.2 FHST Updates:

Scheduled : 54
Successful : 54

2.3 Operations Notes:

For the Friday's operations, PASSOPS personnel instituted a
workaround (using the test side to perform essential duties) for the PASS
problems in data processing and storage problems. By Saturday PASS was
back up and operating in the normal configuration.

The STIS MAMA2 MCE reset while the low voltage was on, outside any
SAA at 327/072450Z. Since there were no on-going STIS activities and the
next high voltage was scheduled in approximately two hours, no recovery
operations were necessary and the STScI was not notified until regular
business hours. Recovery was accomplished via the SMS. These events are
described in HSTAR 6250.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH