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