HUBBLE SPACE TELESCOPE

       DAILY REPORT #2959

PERIOD COVERED:  0000Z (UTC) 09/18/01 - 0000Z (UTC) 09/19/01

Daily Status Report as of 262/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed Two Sets of STIS/CCD 8901 (Dark Monitor-Part 1)

        The Space Telescope Imaging Spectrograph (CCD) was used to monitor 
the darks.  There was no anomalous activity.

    1.2 Completed WF/PC-2 9060 (Photometry of a Statistically Significant 
Sample of Kuiper Belt Objects)

        The WF/PC-2 was used to propel the physical study of KBOs forward 
by performing accurate photometry at V, R, and I on a sample of up to 150 
KBOs.  The sample is made up of objects that will be observed at thermal 
infrared wavelengths by SIRTF and will be used with those data to derive 
the first accurate diameters and albedos for a large sample of KBOs.  The 
observations completed nominally.

    1.3 Completed Two Sets of WF/PC-2 8936 (Cycle 10 Supplemental Darks Pt1/3)

        The WF/PC-2 was used to perform a dark calibration program that 
obtains three dark frames every day to provide data for monitoring and 
characterizing the evolution of hot pixels.  The proposal completed with no 
reported problems.

    1.4 Completed STIS/CCD 8903 (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.  There were no problems.

    1.5 Completed WF/PC-2/STIS/CCD 9174 (Using Optically Faint Radio 
Sources to Pinpoint Dusty Proto-Galaxies)

        The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were 
used to observe a number of high redshift, dusty starburst galaxies that 
remain invisible in ground based in the Hubble Deep Field.  These galaxies 
appear as faint radio sources with bright submillimeter counterparts, 
demonstrating they are very dusty systems.  The luminosities of these 
galaxies suggest they are in the process of converting the bulk of their 
gas mass into stars, and will likely evolve into present day massive 
ellipticals.  The observations completed normally, with no reported problems.

    1.6 Completed Two Sets of STIS/CCD 9088 (Next Generation Spectral 
Library of Stars)

        The Space Telescope Imaging Spectrograph (CCD) was used to produce 
a "Next Generation'' Spectral Library of 600 stars for use in modeling the 
integrated light of galaxies and clusters by using the low dispersion UV 
and optical gratings of STIS.  The library will be roughly equally divided 
among four metallicities, very low {Fe/H < -1.5}, low {-1.5 < Fe/H < -0.5}, 
near-solar {-0.5 < Fe/H < 0.1}, and super-solar {Fe/H > 0.1}, well-sampling 
the entire HR-diagram in each bin.  Such a library will surpass all extant 
compilations and have lasting archival value, well into the Next Generation 
Space Telescope era.  No problems occurred.

    1.7 Completed STIS/CCD/MA2 9048 (Boron Constraints on Slow Mixing in 
Low Mass Stars)

        The Space Telescope Imaging Spectrograph (CCD and MA2) was used to 
observe the atomic and nuclear characteristics of the light elements Li, Be 
and B, that make their photospheric abundances ideal tracers of internal 
physical processes in stars.  Both Li and Be have been heavily utilized to 
this end since their diminished abundances are a direct result of the 
extent of internal slow mixing between surface and interior layers, as has 
been shown with ground-based data.  Boron provides a fresh and special 
probe because it survives to greater depths inside stars than does Li or 
Be, and can thus uniquely reveal the depth of mixing.  It is proposed to 
observe B in stars with very large depletions of Li and Be, i.e. stars 
which have been the most seriously affected by mixing.  No problems occurred.

    1.8 Completed Two Sets of WF/PC-2 9244 (POMS Test Proposal: WFII 
Parallel Archive Proposal Continuation)

        The WF/PC-2 was used to perform a generic target version of the 
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 observations completed with no anomalous 
activity.

    1.9 Completed Two Sets of STIS/MA2 8843 (Cycle 9 MAMA Dark Measurements)

        The Space Telescope Imaging Spectrograph (MA2) was used to perform 
the routine monitoring of the MAMA detector dark noise.  The proposal 
completed nominally.

    1.10 Completed STIS/CCD/MA2 8915 (Echelle Sensitivity)

        The Space Telescope Imaging Spectrograph (CCD and MA2) was used to 
observe the flux standard G191B2B, obtaining echelle spectra in all primary 
and intermediate wavelength settings.  There was no reported anomalous 
activity.

    1.11 Completed WF/PC-2 9249 (POMS Test Proposal: WFII Backup Parallel 
Archive Proposal II)

        The WF/PC-2 was used to execute a POMS test proposal designed to 
simulate scientific plans.  The proposal completed with no reported problems.

    1.12 Completed STIS/CCD 9128 (A Snapshot Survey of Absorption Lines 
from High Velocity Clouds in the Milky Way)

        The Space Telescope Imaging Spectrograph (CCD) was used to search 
for Mg II and Mg I absorption from Galactic High Velocity Clouds {HVCs} 
along the sightlines of 51 of the brightest QSOs, BL Lacs and Seyfert 2 
galaxies in the sky.  The observations completed with no reported problems.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions:  7
Successful:  7

  Scheduled Re-acquisitions: 10
Successful: 10

    2.2 FHST Updates:
Scheduled: 10
Successful: 10

    2.3 Operations Notes:

        The SSR EDAC error counter was cleared at 261/1331Z, using ROP SR-1A.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW