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HUBBLE SPACE TELESCOPE

DAILY REPORT #2813

PERIOD COVERED: 0000Z (UTC) 02/20/01 - 0000Z (UTC) 02/21/01

Daily Status Report as of 052/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed STIS/CCD/MA2 8627 (Testing Theories Of Wind/Jet
Production In YSOs)

The Space Telescope Imaging Spectrograph (CCD and MA2) was used to
test theories of jet/wind production from the accretion disks of low-mass
young stellar objects, providing new insight into disk physics, accretion
energy balance, and jet collimation. Observations of the Fe II ultraviolet
lines in absorption will probe lower-density and lower-temperature material
than optical forbidden and permitted emission lines, and thus provide
unique information on jet/wind launching and
acceleration. Velocity-resolved spectra will distinguish between X-wind
models, in which all the mass ejection occurs from the inner disk edge, and
disk wind models, where the flow originates from a much larger area of the
disk. The proposal completed nominally.

1.2 Completed Two Sets of WF/PC-2 8823 (Decontaminations and Associated
Observations Pt. 2/4)

The WF/PC-2 was used for the monthly WFPC2 decons. Also included
were instrument monitors tied to decons: photometric stability check, focus
monitor, pre- and post-decon internals {bias, intflats, kspots, & darks},
UV throughput check, VISFLAT sweep, and internal UV flat check. There were
no reported problems.

1.3 Completed Five Sets of WF/PC-2 8827 (Cycle 9 Supplemental Darks pt2/3)

The WF/PC-2 was used to obtain three dark frames every day to
provide data for monitoring and characterizing the evolution of hot
pixels. The proposal completed nominally.

1.4 Completed Six Sets of WF/PC-2 8805 (POMS Test Proposal: WFII
Parallel Archive Proposal Continuation)

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

1.5 Completed Three Sets of STIS/CCD 8562 (Probing the Large Scale
Structure: Cosmic Shear Observations)

The Space Telescope Imaging Spectrograph (CCD) was used to probe
the distortion of light bundles from distant galaxies, looking at the
statistical properties of the intervening inhomogeneous {dark} matter
distribution. The proposal completed nominally.

1.6 Completed FGS/1R 8834 (Calibrating Interferometric Response as a
Function of Spectral Color)

Fine Guidance Sensor 1R was used to obtain reference point source
Transfer Functions {S-Curves} through the F583W filter at the center
position of the FOV for a variety of spectral colors. The proposal
completed with no reported problems.

1.7 Completed WF/PC-2 8683 (Imaging Of Brightest Cluster Galaxies: The
High End Of The Black Hole Mass Distribution)

The WF/PC-2 was used to make kinematic black hole detections in
galaxies to decide whether they indicate that the mass correlates with both
optical luminosity and radio power. The observation completed with no
reported problems.

1.8 Completed STIS/CCD 8838 (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. The proposal completed nominally.

1.9 Completed STIS/CCD 8664 (Structural Measurement of Globular
Clusters in M31 and NGC 5128: Stalking the Fundamental Plane)

The Space Telescope Imaging Spectrograph (CCD) was used to observe
in the snapshot mode to image a wide selection of individual globular
clusters in two other large galaxies {M31 and NGC 5128} for measurement of
their structural parameters {r_c, c, central surface brightness}. We will
use these to compute their binding energies and define the FP in these two
galaxies. Comparison with the Milky Way will then give us powerful new
information on just how ``universal'' the cluster formation process was in
the early protogalaxies. The observations completed with no reported problems.

1.10 Completed Two Sets of STIS/CCD 8687 (Elliptical Galaxies With
Nuclear Disks of Stars: Black Hole Search and Stellar Populations)

The Space telescope Imaging Spectrograph (CCD) was used to observe
galaxy NGC 3706 {E3} and NGC 4486A {E2} to search for supermassive black
holes {BHs}. NGC 3706 contains a bright, edge-on nuclear disk of
stars. Therefore we can measure the BH mass mbh as easily as in a galaxy
with a gas disk but without uncertainty about whether the motions are
affected by non-gravitational forces. NGC 4486A, like NGC 4486B, is a
dwarf elliptical companion of NGC 4486 {M s87} with signs of an unusually
massive BH. The observations completed and no anomalous activity occurred.

1.11 Completed STIS/CCD 8837 (CCD Dark Monitor-Part 1)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the darks. The proposal completed with no reported problems.

1.12 Completed STIS/CCD 8881 (An Unbiased Survey of X-Ray and Optical
Emission From Extended Radio Jets in AGN)

The Space Telescope Imaging Spectrograph (CCD) was used to an X-ray
bright jet in the distant quasar 1749+279 that shows that X-rays can be
energetically dominant in relativistic jets. The observations completed
nominally.

1.13 Completed WF/PC-2 8719 (A Continuation Of A Snapshot Survey Of X-
Ray Selected Central Cluster Galaxies0

The WF/PC-2 was used to perform snapshot images of a representative
subset of the central cluster galaxies from an X-ray selected cluster
sample that would provide important constraints on the formation and
evolution of dust in cluster cores that cannot be obtained from
ground-based observations. The observations completed as planned.

1.14 Completed STIS/CCD 8623 (HST, Chandra, and FUSE Studies of
Interstellar Material toward HD 24534 {aka X Persei})

The Space Telescope Imaging Spectrograph (CCD) was used to make
high-resolution UV spectroscopic observations of the reddened star HD 24534
{aka X Persei}, in order to: {1} establish accurate gas-phase column
densities for elements other than carbon and oxygen {for which high-
quality data already exist}, for the purpose of deriving {in conjunction
with FUSE and Chandra observations} absolute depletions of several key
elements; and {2} further pursue molecular abundances toward this star, to
supplement HST/GHRS data obtained earlier which showed that this line of
sight supports a rich chemistry. The observations completed nominally.

1.15 Completed WF/PC-2 8816 (Cycle 9 UV Earthflats)

The WF/PC-2 was used to obtain sequences of Earth streak flats to
improve the quality of pipeline flat fields for the WFPC2 UV filter set and
in order to monitor flat field stability. There were no reported problems.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 12
Successful: 12

Scheduled Re-acquisitions: 6
Successful: 6

2.2 FHST Updates:
Scheduled: 25
Successful: 25

2.3 Operations Notes:

The SSR EDAC error counter was cleared four times, using ROP SR-1A.

The STIS MCE-2 reset at 051/120459Z while the low voltage was on
and while inside an SAA interval. The STIS flight software error counter
was reset at 051/1213Z per ROP NS-12. MAMA-2 was recovered at 052/0407Z
via normal SMS commands at the time of high voltage on commanding.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW