Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/hst_status_01_29_02 Дата изменения: Tue Jan 29 14:41:28 2002 Дата индексирования: Sat Dec 22 19:28:26 2007 Кодировка: Поисковые слова: magnetar

HUBBLE SPACE TELESCOPE

DAILY REPORT #3044

PERIOD COVERED: 0000Z (UTC) 01/28/02 - 0000Z (UTC) 01/29/02

Daily Status Report as of 029/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed Five Sets of WF/PC-2 8937 (Cycle 9 Supplemental Darks pt2/3)

The WF/PC-2 was used obtain three dark frames every day to provide
data for monitoring and characterizing the evolution of hot pixels. No
problems were encountered.

1.2 Completed STIS/MA1 9063 (Optical Counterparts of Isolated Neutron
Stars)

The Space Telescope Imaging Spectrograph (MA1) was used to test the
understanding of both quantum chromodynamics {QCD} and quantum
electrodynamics {QED}. Specifically, the measurement of radii of neutron
stars can test QCD at high density. This is being realized through
intensive X-ray observations of bright nearby neutron stars. However, the
natures of these important sources are not clear and to this end a simple
proper motion program is proposed as a means to obtain their ages and
potential association with star-forming regions. One of the sources is RX
J0720.4-3125 which has been argued to be an old magnetar --- a highly
magnetized neutron star --- and thanks to its high count rate is already a
choice object for X-ray missions. Magnetars, with their extreme magnetic
field strengths, are excellent laboratories for testing out some
expectation of QED. There were no reported problems.

1.3 Completed Six Sets of WF/PC-2 8935 (Cycle 10 Standard Darks)

The WF/PC-2 was used to obtain dark frames every week in order to
provide data for the ongoing calibration of the CCD dark current rate, and
to monitor and characterize the evolution of hot pixels. Over an extended
period these data will also provide a monitor of radiation damage to the
CCDs. The proposal completed with no reported problems.

1.4 Completed STIS/CCD 9077 (Survey of the LMC Planetary Nebulae)

The Space Telescope Imaging Spectrograph (CCD) was used to perform
a snapshot survey of all known LMC planetary nebulae {PNe} in order to
study the co-evolution of the nebulae and their central stars, and to probe
the chemical enrichment history of the LMC. There were no reported problems.

1.5 Completed STIS/MA2 9573 (NUV-MAMA Daily Dark Monitor)

The Space Telescope Imaging Spectrograph (MA2) was used to perform
daily monitoring of the NUV MAMA detector dark noise in order to monitor
the effects of thermal changes on the NUV dark rate. No problems occurred.

1.6 Completed STIS/CCD 9110 (A Search for Kuiper Belt Object Satellites)

The Space Telescope Imaging Spectrograph (CCD) was used to
investigate whether the large number of collisions thought to have taken
place in the primordial Kuiper belt suggest that many Kuiper belt objects
{KBOs} could have suffered binary-forming collisions similar to that which
formed the Pluto -- Charon binary. Detection of such KBO satellites would
allow measurement of KBO masses, would help to understand the past
collisional environment of the Kuiper belt, and would give a context to the
otherwise unique-seeming formation of the Pluto -- Charon binary. The
proposal completed with no reported problems.

1.7 Completed Two Sets of STIS/CCD 8901 (Dark Monitor-Part 1)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the darks. There was no anomalous activity.

1.8 Completed STIS/CCD 8903 (Bias Monitor - Part 1)

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. There were no problems.

1.9 Completed STIS/CCD 9068 (Accurate Determination of the BH Mass in
Early-Type Disk Galaxies)

The Space Telescope Imaging Spectrograph (CCD) was used to map the
ionized gas velocity field of three early-type disk galaxies, for which we
will be able to derive high precision BH mass measurements. The sample
galaxies have been selected by means of ground-based high resolution
spectroscopy among 37 observed objects, since it is recognized in their
central regions the clear presence of a circumnuclear Keplerian disk of
ionized disk suitable for dynamical modelling. The proposal completed with
no reported problems.

1.10 Completed Seven Sets of WF/PC-2 9318 (POMS Test Proposal: WFII
Parallel Archive Proposal Continuation)

The WF/PC-2 was used to perform the generic target version of the
WFPC2 Archival Pure Parallel program. The program was used to take
parallel images of random areas of the sky, following the recommendations
of the Parallels Working Group. There were no reported problems.

1.11 Completed WF/PC-2 9319 (POMS Test Proposal: WFII Backup Parallel
Archive Proposal II)

The WF/PC-2 was used to execute a POMS test proposal, designed to
simulate future scientific plans. The proposal completed without incident.

1.12 Completed WF/PC-2 8939 (Cycle 10 Internal Monitor)

The WF/PC-2 was used to calibrate the internal monitor, to be run
weekly to monitor the health of the cameras. No problems were encountered.

1.13 Completed STIS/CCD 9100 (High-Velocity Collimated Outflows and
Equatorial Toroids in Cool Stars: A Study of V Hydrae and PI^1 Gru)

The Space Telescope Imaging Spectrograph (CCD) was used to observe
the two cool red giant stars V Hya and PI^1 Gru that show strong
observational evidence for the presence of high-velocity collimated
outflows and equatorial toroids, both of which have been postulated to play
significant roles in the formation of bipolar planetary nebulae. All
observations completed as planned.

1.14 Completed STIS/CCD/MA2 8471 (D/H In Quasar Absorption Line Systems)

The Space Telescope Imaging Spectrograph (CCD and MA2) was used to
record the high Lyman series lines of two damped Lyman-alpha systems in the
coverage of the near-UV band, where the interference from randomly situated
Lyman-alpha forest lines is much lower than at visible wavelengths. A
secondary objective of this program is to observe various atomic lines
shortward of Lyman-alpha in these systems {such as absorption from the O VI
doublet arising from very hot gas}, and to register absorption features
from the Lyman and Werner bands of molecular hydrogen if the molecular
abundances are high enough to make them detectable. The proposal completed
with no reported problems.

1.15 Completed Three Sets of WF/PC-2 8941 (Cycle 10 UV Earthflats)

The WF/PC-2 was used to monitor flat field stability by obtaining
sequences of earth streak flats to improve the quality of pipeline flat
fields for the WFPC2 UV filter set. The proposal had no problems.

1.16 Completed Two Sets of STIS/MA2 8920 (Cycle 10 MAMA Dark Measurements)

The Space Telescope Imaging Spectrograph (MA2) was used to perform
the routine monitoring of the MAMA detector dark noise, and is the primary
means of checking on health of the MAMA detectors systems through frequent
monitoring of the background count rate. The proposal completed with no
reported anomalous activity.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 4
Successful: 4

Scheduled Re-acquisitions: 11
Successful: 11

2.2 FHST Updates:
Scheduled: 9
Successful: 9

2.3 Operations Notes:

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

The ephemeris table was uplinked at 029/0119Z per ROP DF-07A.

ESTR-2 was re-conditioned at 029/0535Z as directed by ROP RD-7A.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW