Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_98/hst_status_02_23_98 Дата изменения: Mon Feb 23 15:08:23 1998 Дата индексирования: Sun Dec 23 10:54:46 2007 Кодировка: Поисковые слова: m 31

HUBBLE SPACE TELESCOPE

DAILY REPORT #2065

PERIOD COVERED: 0000Z (UTC) 02/20/98 - 0000Z (UTC) 02/23/98

Daily Status Report as of 054/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Three Sets of STIS/CCD 7926 (CCD Dark and Bias Monitor --
Continued)

The Space Telescope Imaging Spectrograph (CCD) was used to make
several dark and bias calibration observations. This is 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. These observations will also 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.

1.2 Completed Seven 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.

1.3 Completed Three Sets of WF/PC-2 7384 (Probing the Fine-Scale
Structure and Colors of Interstellar "Cirrus" Clouds)

The WF/PC-2 was used to make observations of the nebulae NEB-011543
and NEB-011548 in order to probe the fine-scale structure and colors of
interstellar "cirrus" clouds. The ubiquitous nature of Galactic "cirrus"
clouds make them both: {1} accessible targets for the study of the
properties of interstellar dust grains, and {2} sources of confusion in
investigations of distant objects {e.g. galaxies, clusters of galaxies} at
low surface brightness levels. The observations were completed as planned,
and no problems were reported.

1.4 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.

1.5 Completed Three Sets of STIS/CCD 7803 (Daily Darks to Update
Acquisition Bad Pixel Table Part III)

The Space Telescope Imaging Spectrograph (CCD) was used to make
daily dark calibration updates. These daily 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 completed as planned, and no anomalies were reported.

1.6 Completed STIS/CCD/WF/PC-2 7367 (Multi-Mavelength Imaging of
Circumstellar Disks in the Orion Nebula)

The Space Telescope Imaging Spectrograph (CCD) and the WF/PC-2 was
used to make multi-wavelength imaging of circumstellar disks (NGC-1976)
seen as silhouettes against the bright emission-line background in the
Orion Nebula. With these data one should be able to examine the radial
structure of the disks in great detail, and over a wide spatial extent.
The observations were completed as planned, and no problems were reported.

1.7 Completed Eight Sets of STIS/CCD 7908 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal)

The Space Telescope Imaging Spectrograph (CCD) was used to make
calibration observations as part of the POMS Test Proposal. This was a
STIS non-scripted parallel proposal. The observations were completed as
planned, and no problems were reported.

1.8 Completed 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.

1.9 Completed Two Sets of NIC/2 7327 (Elliptical Galaxy Evolution at
High Redshift: IR Imaging of 60 Distant Clusters)

The Near Infrared Camera (Camera Two) was used to make infrared
observations high redshifted elliptical galaxies in galactic clusters
MS0451.6-0 and CL1137-120. By measuring the structural properties of high
redshift cluster elliptical galaxies, it is hoped to resolve the
controversy regarding the age and formation history of bright cluster
ellipticals. The observations were executed as scheduled, and no anomalies
were noted.

1.10 Completed NIC/2 7420 (A Near-Infrared Search for Very Low Mass
Companions to Stars Within 10 Parsecs of the Sun)

The Near Infrared Camera (Camera Two) was used to make searching
observations for very low mass companions to variable star HD30652. This
star is known to be within 10 parsecs of the Sun. The observations were
executed as scheduled, and no anomalies were noted.

1.11 Completed STIS/CCD 7435 (Nuclear Kinematics and Stellar Population
Gradients in the Recent Merger Remnants NGC-7252 & NGC-3921)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of NGC-3921 in order to study its nuclear kinematics and
stellar population gradients. Ground-based spectra show this galaxy
contains centrally concentrated young stellar populations and emission-line
gas, indicative of a merger-induced episode of star formation. A wave
length calibration observation was also taken. The observations were
completed as planned, and no problems were reported.

1.12 Completed Two Sets of NIC/3 7499 (NICMOS Extragalactic Parallel
Grism Survey)

The Near Infrared Camera (Camera Three) was used to make
observations as part of an extragalactic parallel Grism Survey. This
propose is a parallel program using NICMOS's unique capabilities for
slitless spectroscopy in the near IR. The observations were completed as
planned, and no anomalies were reported.

1.13 Completed Three Sets of NIC/1/2/3 7215 (Line and Continuum
Investigation of NGC 1068 and NGC 4151)

The Near Infrared Camera (Cameras One, Two, and Three) was used to
make observations of the bright, nearby AGNs NGC-1068. This program
studies the high resolution morphology of the continuum and line emission
in these two galaxies. The continuum studies will determine the stellar
and non-stellar luminosity distribution in the galaxies. The observations
were executed as scheduled, and no anomalies were noted.

1.14 Completed NIC/3 7830 (IR Spectra for Known-Mass M Dwarfs)

The Near Infrared Camera (Camera Three) was used to make infrared
spectrographic observations of M-Class dwarf star GJ473AB. Over the last
decade there has been considerable debate on two major issues in the
low-mass star literature: {1} the effective temperature scale for M dwarfs
and its relation to mass and luminosity and {2} the conversion from an
absolute magnitude in some passband to a bolometric magnitude. The
observations were executed as scheduled, and no anomalies were noted.

1.15 Completed Six Sets of WF/PC-2 7909 (POMS Test Proposal: WF II
Parallel Archive Proposal)

The WF/PC-2 was used to make parallel observations as part of the
POMS test proposal. This test proposal is designed to simulate scientific
plans. As detailed in 2.1, the acquisition for the final iteration of this
proposal defaulted to fine lock on one FGS only. Otherwise, the
observations were completed as planned, and no further problems were
reported.

1.16 Completed STIS/MA1 7434 (The Supernova Intensive Study)

The Space Telescope Imaging Spectrograph (MA1) was used to continue
the long-term project on supernovae by observing SN1993J. HST can make
unique contributions to understanding supernovae, as has been demonstrated
through this program in past years, and now STIS and NICMOS offer new
opportunities for deepening this investigation. The aim of the proposal is
to explore the UV emission from supernovae, exploit the spatial resolution
of HST and press the late-time observations of supernovae into uncharted
territory. The observations were completed as planned, and no anomalies
were reported.

1.17 Completed Two Sets of NIC/2/3 7907 (NICMOS Pure Parallel Winter 97-98)

The Near Infrared Camera (Cameras Two and Three) was used to make
pure parallel spectrographic observations of sky regions when another
instrument is prime. As detailed in 2.1, the acquisition for the second
iteration of this proposal defaulted to fine lock on one FGS only.
Otherwise, the observations were completed as planned, and no further
anomalies were reported.

1.18 Completed WF/PC-2 7387 (T-Tauri Star Snapshot Survey)

The WF/PC-2 was used to make observations of the star HD-17717 as
part of a T-Tauri class star survey. The observations were executed as
scheduled, and no anomalies were noted.

1.19 Completed STIS/CCD 7674 (IR Standards)

The Space Telescope Imaging Spectrograph (CCD) was used make
observations of stadard stars HZ43 and HD93521 to establish a set of
absolute flux standards on the WD scale that extend the existing wavelength
coverage to 10300A with the STIS G750L grating setting. The proposal
completed with no reported problems.

1.20 Completed FOC/96 6426 (A Search for Multiple Images of QSOs Seen
Through Damped Ly-Alpha Absorbers)

The Faint Object Camera (f/96) was used to make observations of QSO
B0218+35.7. The propose of these observations is to obtain high-resolution
images of a sample of QSOs with strong damped Lyman-Alpha absorption in
their spectra. The observations should determine whether these QSOs are
multiply imaged by gravitational lensing. The observations were completed
as planned with no problems.

1.21 Completed Two Sets of 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-598 (a.k.a., M-33). 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 with no problems.

1.22 Completed WF/PC-2 6633 (Cusps or Cores in Barred Bulges?)

The WF/PC-2 was used to make observations of the SB class (Barred)
galaxy NGC-3516 in order to study its nuclear bulge region and cusps. This
is a highly tri-axial, tumbling, low-mass stellar systems. The
observations were completed as planned, and no problems were reported.

1.23 Completed NIC/1/2/3 7880 (A Search For Old Stars in IZw18, Continued)

The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of galaxy IZW18 to search for old stars. The blue
compact dwarf galaxy IZw18 still stands out as one of the most interesting
objects at low redshift. Its heavy element abundance is the lowest ever
measured in the ionized gaseous component of a galaxy. The observations
were completed as scheduled, and no anomalies were reported.

1.24 Completed STIS/CCD/MA1 7295 (Galaxy Rotation Curves at Large Radius
using Lyman-alpha Absorption Lines)

The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make rotational spectrographic observations of the galaxy PG0804+761. This
is to investigate the outer rotation curves of eight spiral galaxies at
very large galactocentric radii by using the kinematical information from
Lyman-alpha absorption lines in the spectra of background quasars. As
detailed in 2.1, the acquisition for this proposal defaulted to fine lock
on one FGS only. Otherwise, the observations were executed as scheduled,
and no further problems were reported.

1.25 Completed NIC/1/2 7607 (NICMOS Photometric Monitoring Test)

The Near Infrared Camera (Cameras One and Two) was used to conduct a
photometric monitoring test by making observations of standard star
P330E-CAL. The standard star was observed with NIC1 & NIC2 at six
different wavelengths spanning the NICMOS wavelength range. The
observations were completed as planned, and no anomalies were reported.

1.26 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 STAR1601-2 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.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 29
Successful : 29

The acquisition at 053/154424Z defaulted to fine lock on FGS-3 only
when FGS-1 failed to acquire. HSTAR 6359 was written. The proposals
detailed in 1.15, 1.17, and 1.24 may have been affected.

Scheduled Reacquisitions : 11
Successful : 11

2.2 FHST Updates:

Scheduled : 54
Successful : 54

2.3 Operations Notes:

A NICMOS memory monitor was set for a single bit error location at
051/1812Z.

The STIS error counter was reset using ROP NS-12 at 051/2001Z.

The STIS MAMA-1 MCE reset twice, at 051/190715Z and at 052/230418Z,
while in the SAA and while the low voltage was on. HSTARs 6353 and 6356
were written. The recovery occurred via the SMS timeline at 053/1541Z.

A NICMOS EDAC single error was recorded at 052/143555Z. No other
error flags or status buffer messages were recorded. ROP NS-11 was
performed at 052/1522Z to dump the error log.

At 054/082055Z, while in a ZOE and outside an SAA contour, NICMOS
suspended and went to boot mode while executing NICMOS proposal 7863.
Parameters out of limits were: the NICMOS suspend state (NSUSTATE), the NIC
bad minor frame fail (NFMFAIL), and the NIC bad mode count (NFBDMDCT). The
effects on NICMOS science will be reported in the next report. HSTAR 6361
was written. The suspension is currently under investigation. Once fully
understood, recovery operations will be planned.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.
/DMH