HUBBLE SPACE TELESCOPE

   DAILY REPORT #2893

PERIOD COVERED:  0000Z (UTC) 06/13/01 - 0000Z (UTC) 06/14/01

Daily Status Report as of 165/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed WF/PC-2 8592 (Pixel Microlensing of M87)

        The WF/PC-2 was used to undertake a pixel microlensing study of M87 
in order to: 1} probe the lower end of the M87 IMF via star-star lensing, 
2} possibly obtain the first evidence of Massive Compact Objects (MACHOs) 
in the halo of a galaxy other than our own, and 3} search for intracluster 
MACHOs.  The proposal completed nominally.

    1.2 Completed WF/PC-2 8600 (Dwarf Elliptical Galaxy Snapshot Survey III)

        The WF/PC-2 was used to extend our V and I snapshot survey of 
nearby dwarf elliptical {dE} galaxies to include a sample of 30 bright dE 
with significant globular cluster {GC} populations.  There were no reported 
problems.

    1.3 Completed WF/PC-2 8598 (Snapshot Survey of Extended OIIl Lambda 
5007Angstrom Emission in Seyfert Galaxies)

        The WF/PC-2 was used for a snapshot survey of narrow band OIII 
Lambda 5007Angstrom images for a well defined sample of 88 Seyfert galaxies 
{29 Seyfert 1s and 59 Seyfert 2s}, 18 of which already have data in the 
archive, selected from a mostly isotropic property, the 60Mum flux.  These 
data will be used: 1} to determine the origin of the misalignment between 
the accretion disk axis and the host galaxy plane axis, which can be due to 
mergers with other galaxies, or by the self induced radiation warping; 2} 
to compare the size and shape of the Narrow Line Regions (NLR) of Seyfert 
1s and Seyfert 2s, and to study the frequency of conically shaped NLR in 
Seyfert galaxies, which are usually unresolved from ground-based 
observations; and 3} estimate the importance of shocks to the ionization of 
the NLR.  The observations completed with no reported problems.

    1.4 Completed WF/PC-2 9115 (The Evolution of Extreme Gas Rich Galaxies)

        The WF/PC-2 was used to observe a recently discovered sample of the 
closest known low surface brightness, very gas-rich dwarf galaxies outside 
of the Local Group.  These galaxies represent an extreme star formation 
environment, where the fuel for star formation appears plentiful, the local 
environment {the Centaurus A group of galaxies} provides opportunities for 
tidally-induced star formation, and yet star formation appears to be 
surpressed {by two orders of magnitude} compared to other `typical' 
galaxies.  The goal is to understand the star formation history in this 
puzzling environment of low stellar density and high gas content.  By 
resolving the underlying stellar component, the observer will obtain 
critical information on the mean metallicity and star formation history of 
these galaxies.

    1.5 Completed WF/PC-2 9085 (Measuring The Masses Of High-Z Quasar Host 
Galaxies)

        The WF/PC-2 was used to investigate the close link between 
black-hole mass and spheroid mass in both quiescent and active galaxies in 
the local universe.  Consequently black-hole and spheroid formation/growth 
are now viewed as intimately related processes, and establishing the mass 
of quasar host galaxies as a function of redshift is now seen as a key 
measurement in observational cosmology.  From the Cycle 7 NICMOS program, 
the best estimate to date of the mass evolution of the hosts of both 
radio-quiet and radio-loud quasars out to z ~eq 2 has been derived.  Under 
the assumption of passive stellar-population evolution our results are 
consistent with the black-hole/spheroid population being unchanged out to z 
~eq 2.  However, the crucial assumption of passive evolution needs to be 
tested.  All observations competed nominally.

    1.6 Completed WF/PC-2 8773 (Expansion Parallax Distances to Planetary 
Nebulae)

        The WF/PC-2 was used to observe planetary nebulae {PNe} for which 
the lack of reliable distances is especially troubling.  Acquired by 
generalized statistical methods in all but a handful of cases, individual 
PNe distances are often uncertain by factors of two or more.  The 
observations completed nominally.

    1.7 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:  8
Successful:  8

  Scheduled Re-acquisitions:  9
Successful:  9

    2.2 FHST Updates:
Scheduled: 16
Successful: 16

    2.3 Operations Notes:

        The Space Telescope Imaging Spectrograph remains in safe mode.

        The SSR EDAC error counter was reset once, using ROP SR-1A.

        A TTR was generated when there was a required re-transmit during a 
486 load at 165/0834Z.  As a result, the engineering status buffer limits 
were adjusted at 165/0839Z per ROP DF-18A.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        An RMGA calibration is scheduled to begin at approximately 165/1340Z.

        Continuation of normal science observations and calibrations.

/CAW