Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_98/hst_status_11_16_98 Дата изменения: Mon Nov 16 15:36:28 1998 Дата индексирования: Sun Dec 23 10:59:06 2007 Кодировка: Поисковые слова: m 31

HUBBLE SPACE TELESCOPE

DAILY REPORT #2251

PERIOD COVERED: 0000Z (UTC) 11/13/98 - 0000Z (UTC) 11/16/98

Daily Status Report as of 320/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Eight 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.

1.2 Completed Six 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 Eleven 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. Per HSTAR 6774 and 2.1, the acquisition for the
eighth iteration of this proposal defaulted to fine lock backup on one FGS
only. Otherwise, the observations were completed as planned, and no
further anomalies were noted.

1.4 Completed WF/PC-2/STIS/CCD/MA2 7334 (The Primordial Abundance of
Deuterium From a Metal-Poor Damped Lyman Alpha System)

The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD and
MA1) were used to make observations of the quasar Q2206-1956 to study the
primordial abundance of deuterium from a metal-poor damped Lyman-Alpha
system. It should be possible to detect D absorption in many Lyman series
lines and the chance of contamination by interloper H clouds is reduced by
a factor of > 150. A wave length calibration image was also taken. The
observations were executed as scheduled, and no anomalies were noted.

1.5 Completed Nine Sets of NIC/1/2/3 7961 (Flats: Warming Up)

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. These flats will provide a monitor for particulate
comtamination and detector lateral position {from the coronagraphic spot
and FDA vignetting}. Per HSTAR 6774 and 2.1, the acquisition for the
eighth iteration of this proposal defaulted to fine lock backup on one FGS
only. Otherwise, the proposal completed with no further reported problems.

1.6 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.

1.7 Completed Five Sets of 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.

1.8 Completed WF/PC-2 6838 (Dynamical Properties of Distant Field Galaxies)

The WF/PC-2 was used to make observations of distant galaxies
contained in a location known as Field-0017. A sample of several hundred
field galaxies to I = 24 (c.f. toI=22 z~0.5 from Lilly et al. 1995) is
being observed with the Keck telescope in a major new survey. This HST
observational series is designed to match the field-of-view of the Keck
multiple-object spectrograph. The observations were completed as
scheduled, and no problems were noted.

1.9 Completed Seventeen 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. As described in 2.1 and HSTAR 6773, the acquisition for the
seventh this proposal defaulted to fine lock backup on one FGS only.
Otherwise, the observations were executed as scheduled, and no further
anomalies were noted.

1.10 Completed NIC/1/2 7329 (The Nature of the Damped LyAlpha Absorbers
-- A New Study of Young Galaxies)

The Near Infrared Camera (Cameras One and Two) was used to make
observations of the young galaxy/quasar Q0000-2619 in order to study the
nature of its damped Lyman-Alpha Absorbers (DLAs). The DLA line systems,
occasionally found in quasar spectra, provide one of only a few practical
methods of detecting and studying significant numbers of galaxies at high
redshifts. The observations were executed as scheduled, and no anomalies
were noted.

1.11 Completed NIC/2 7894 (Completing A Near-Infrared Search for Very
Low Mass Companions to Stars within 10 pc)

The Near Infrared Camera (Camera Two) was to be used to make
observations searching for very low mass (VLM) companions to the star
CD-31D9113. This search will be the largest, most sensitive,
volume-limited search for VLM companions ever undertaken. The observations
for this proposal did not occur due to the acquisition failure, and the
fact that the take data flag was not up, detailed in 2.1 and HSTAR 6770.

1.12 Completed NIC/2 8079 (Mapping the Light Scatter in the NICMOS
Coronagraphic Hole {PSF Recovery Orbits})

The Near Infrared Camera (Camera Two) was used to make observations
of star HD101501 in order to map the scattering of light within the NICMOS
coronagraphic hole. The targets was dithered about the low scatter point
to map out the scatter about the hole. The observations were completed as
planned, and no problems were reported.

1.13 Completed Five Sets of NIC/2 7226 (Search for Massive Jupiters)

The Near Infrared Camera (Camera Two) was used to make a corographic
search for massive planets around nearby, young main sequence stars.
Because of the extreme youth of these objects, any low-mass brown dwarf and
planetary companions will still be in a higher luminosity phase and thus
easily detectable. A dark calibration image was also taken. The
observations were executed as scheduled, and no anomalies were noted.

1.14 Completed WF/PC-2 6563 (The Helical Jet/ISM Interaction in NGC 4258)

The WF/PC-2 was used to make observations of the helical jets on
galaxy NGC-4258 and the interaction of the jets with the interstellar
medium. NGC-4258 is a nearby active spiral with famous jets visible in
radio continuum, visual emission lines, and soft x-rays. The observations
were executed as scheduled, and no anomalies were noted.

1.15 Completed NIC/3 7884 (Observation of Two Comet-Asteroid Transition
Objects)

The Near Infrared Camera (Camera Three) was used to make
observations of the comet/asteroid object Phaeton. These observations will
be combined with results from our ground based study of cometary nuclei in
an effort to determine the origin of this object. The observations were
completed as planned, and no anomalies were reported.

1.16 Completed WF/PC-2 6827 (The Enigmatic Soft Gamma-Ray Repeaters)

The WF/PC-2 was used to make observations of object N49-052601, the
optical/ultraviolet counterpart to a enigmatic soft gamma-ray Repeater.
This is the most enigmatic of a class of sources, which, for reasons
unknown, repeatedly show high-energy bursts. The observations were
executed as scheduled, and no anomalies were noted.

1.17 Completed STIS/CCD/MA1 7299 (Interfaces Between Hot and Cold Gas:
The Superbubble N51D in the LMC)

The Space Telescope Imaging Telescope (CCD/MA1) was used to take
E140M echelle spectra for four probes of the X -ray bright superbubble
SK-67.107 and SK-67.101 in the LMC, and then to compare those spectra with
WFPC2 images of the H Alpha and S II emission in this region to be taken in
parallel. A wavelenth calibration observations was also taken. Per HSTAR
6774 and 2.1, the acquisition for this proposal defaulted to fine lock
backup on one FGS only. Otherwise, the observations completed without
incident.

1.18 Completed NIC/1/2/3 7233 (Dust Disks Around Main Sequence Stars)

The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the dust disk around the main sequence star
TAU1-ERIDA. The observations were made with the coronagraph to minimize
the effects of glare from the bright central star. A dark calibration
image was also taken. As described in 2.1 and HSTAR 6773, the acquisition
for this proposal defaulted to fine lock backup on one FGS only.
Otherwise, the observations were completed as scheduled, and no further
anomalies were reported.

1.19 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 GJ234AB. 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.

1.20 Completed Four 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. Per HSTAR 6774 and 2.1, the acquisition for the second iteration of
this proposal defaulted to fine lock backup on one FGS only. Otherwise,
the observations were completed as planned, and no further problems were
reported.

1.21 Completed WF/PC-2 6698 (High Resolution Imaging of Bubble and
Superbubbles in H II Regions)

The WF/PC-2 was used to make high resolution observations of the H
II region DEM106. Massive stars dynamically interact with their ambient
interstellar medium via fast stellar winds during their lifetime and via
supernova blasts at their demise. The dynamical interaction causes the
physical structure of an H II region to evolve along with its ionizing
massive stars. The observations were executed as scheduled, and no
anomalies were noted.

1.22 Completed WF/PC-2/STIS/CCD/NIC/2/3 7587 (Ionization Structure of
SN1987A Circumstellar Ring System)

The WF/PC-2, Space Telescope Imaging Spectrograph (CCD), and the
Near Infrared Camera (Cameras Two and Three) were used to make observations
of the super nova LMC-SN1987 and its circumstellar material which is
located in the Large Magellanic Cloud. These data will create spatially
resolved maps of the circumstellar gas in important emission lines to
determine the ionization and density structure of the inner ring. A
wavelength calibration observation was also taken. The observations were
completed as scheduled, and no anomalies were reported.

1.23 Completed Two Sets of NIC/2 7835 (A Search for Superplanets
Embedded in Beta Pic & Vega-like Circumstellar Disks)

The Near Infrared Camera (Camera Two) was used to make observations
of the circumstellar disk around star HD39060 in order to search for
superplanets. The discovery of a circumstellar disk orbiting Beta Pictoris
as well as the discovery of other similar IR-excess Vega-like systems have
provided compelling evidence that our solar system, or at least many of the
processes which are thought to have created it, may be far from unique.
The observations were executed as scheduled, and no anomalies were noted.

1.24 Completed WF/PC-2 8061 (POMS Test Proposal: WF-II Backup Parallel
Archive Proposal)

This is a POMS test proposal designed to simulate scientific plans.
Per HSTAR 6774 and 2.1, the acquisition for this proposal defaulted to fine
lock backup on one FGS only. Otherwise, the proposal was executed as
planned, and no other anomalies were reported.

1.25 Completed Two Sets of WF/PC-2 6540 (Imaging Circumstellar Nebulae
Around Luminous Blue Variables in the Magellanic Clouds)

The WF/PC-2 was used to make observations of the curcumstellar
nebula around the luminous blue variable stars HD35343 and HD269006 which
are located in one of the Magallanic Clouds. The objectives are to study
the distribution of the ionized gas and dust in order to determine the
morphology and physical properties of the circumstellar nebulae, by
observing them in a narrow, line-free V continuum filter and in the H Alpha
emission line. The observations were executed as scheduled, and no
anomalies were noted.

1.26 Completed NIC/1/2/3 7690 (NICMOS Pointed Super Flats)

The Near Infrared Camera (Cameras One, Two and Three) was used to
make super flat field calibration observations. The observations will be
used to build high signal/noise ratio NICMOS flat fields for the different
filters. The observations were executed as scheduled, and no anomalies
were noted.

1.27 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.

2.0 FLIGHT OPERATIONS SUMMARY

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 30
Successful : 29

There was an acquisition failure at 317/145137Z when the scan step
limit was exceeded on FGS-3, the only guiding tracker. The prior full
maneuver updates had indicated good spacecraft attitude. HSTAR 6770 was
written. The proposal described in 1.11 was affected.

The acquisition at 318/110055Z defaulted to fine lock backup on
FGS-3 only when the scan step limit was exceeded on FGS-1. HSTAR 6773 was
written. The proposals detailed in 1.9 and 1.18 may have been affected.

The acquisition at 319/073637Z defaulted to fine lock backup on
FGS-2 only when the scan step limit was exceeded on FGS-3. HSTAR 6774 was
written. The proposals described in 1.3, 1.5, 1.17, 1.20, and 1.24 may
have been affected.

Scheduled Reacquisitions : 9
Successful : 9

2.2 FHST Updates:

Scheduled : 54
Successful : 53

Per HSTAR 6776, the roll delay update scheduled for 319/1927Z failed
three times. The subsequent acquisiton, however, was successful.

2.3 Operations Notes:

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

Three TTRs were written to document a total of thirteen IP data hits.

There were NICMOS EDAC single error bit errors at 316/143055Z, at
317/225756Z, and at 319/184855Z. In each case, the NICMOS internal log was
dumped and the ground system limit was raised by one count.

The VDS phone system failed at 318/0000Z and remained out for
approximately 21 hours. No telephone communications with the network or
via any outside line were possible.

Per ROP NS-3, the NSSC-1 status buffer was dumped at 318/0610Z.

The STIS MCE-2 reset at 318/134721Z while the high voltage was off
and while in an SAA interval. Using ROP NS-12, the STIS error counter was
cleared. The MAMA-2 was recovered via the SMS at the time of the next high
voltage on commanding.

A TTR was written for a non-recoverable 12-minute segment of 32K
engineering data beginning at approximately 319/1228Z.

Per HSTAR 6777, there was a DF-224 SPC software reject error counter
message at 319/233848Z when a close FHST shuuter command was redundantly
issued. ROP DF-16 was used to reset the SPC error counter.

NASCOM reset a piece of equipment at 320/0155Z and, as a result,
ther was an 11-second data drop. A TTR was written.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH