HUBBLE SPACE TELESCOPE

   DAILY REPORT #2809

PERIOD COVERED:  0000Z (UTC) 02/14/01 - 0000Z (UTC) 02/15/01

Daily Status Report as of 046/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed STIS/CCD/MA1 8157 (Molecular Hydrogen in the 
Circumstellar Environments of T Tauri Stars)

        The Space Telescope Imaging Telescope (CCD and MA1) was used to 
probe the gaseous environments of low mass pre-main sequence stars by 
studying the H_2 UV Lyman bands.  Fluorescent H_2 Lyman band emission has 
been detected, pumped by H I Lyman Alpha and Si IV, in 8 classical T Tauri 
stars but not in 3 naked T Tauri stars. The observations will provide 
insights into the spatial distribution of gas near classical T Tauri 
stars.  The proposal completed with no reported problems.

    1.2 Completed Three 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.

    1.3 Completed Six Sets of 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.

    1.4 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.

    1.5 Completed Two Sets of 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.

    1.6 Completed Four 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.

    1.7 Completed WF/PC-2/STIS/CCD 8690 (The Central Region of NGC4696: 
Manifestation of the Physics of Mergers?)

        The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were 
used to observe massive, dominant ellipticals with attendant emission-line 
gas, dust and hot, heavy X--ray emitting coronae which lie at the very 
centers of galaxy clusters.  The physics of these complex, high pressure 
regions remains controversial:  Are cooling flows responsible?  Do mergers 
dominate, with massive accretion events triggering an array of 
phenomena?  Is the AGN crucial?  A major impetus to understanding the 
physics of these regions will come with Chandra.  NGC4696 in the Centaurus 
galaxy cluster is archetypal.  WFPC2 images have shown a dramatic 
bifurcation between gas and dust. T he nucleus itself is seen to be a 
compact triple, with two blue components straddling a third red one.  We 
propose to obtain STIS long- slit spectra along a line-emission filament 
and along a dust filament:  The proposal completed with no reported problems.

    1.8 Completed WF/PC-2 8645 (A Survey of Mid-UV Morphology of Nearby 
Galaxies: Galaxy Structure and Faint Galaxy)

        The WF/PC-2 was used to investigate the relation between star 
formation and the global physical characteristics of galaxies to interpret 
the morphologies of distant galaxies in terms of their evolutionary 
status.  The observations completed nominally.

    1.9 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.

    1.10 Completed Two Sets of WF/PC-2 8632 (A UV Atlas of Nearby Galaxies)

        The WF/PC-2 was used to perform a snapshot survey of local galaxies 
at UV wavelengths with the F300W filter.  The aim of the project is to 
build a reference UV Atlas of normal galaxies, whose optical images are 
well known, with the highest possible degree of information, covering all 
the morphological types and luminosity classes.  The proposal completed 
normally.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 10
Successful: 10

  Scheduled Re-acquisitions:  5
Successful:  5

    2.2 FHST Updates:
Scheduled: 23
Successful: 23

    2.3 Operations Notes:

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

        The SSR pointers were set at 045/1355Z as directed by ROP SR-3.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW