HUBBLE SPACE TELESCOPE

       DAILY REPORT #2948

PERIOD COVERED:  0000Z (UTC) 08/30/01 - 0000Z (UTC) 08/31/01

Daily Status Report as of 243/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed STIS/CCD/MA1/MA2 9113 (Solar UV Radiation and the Origin 
of Life on Earth)

        The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was 
used to observe chromospheric models that will enable the proposers to 
predict the extreme-UV emission of the early Sun and its consequences for 
the erosion of the early Earth's atmosphere and the altered oxidation state 
of the planet, and investigate the effect of metallicity on the UV emission 
and its consequences for the photochemistry of Earth-like planets.  There 
was no anomalous activity.

    1.2 Completed Eight 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.

    1.3 Completed Six Sets of WF/PC-2 8828 (Cycle 9 Supplemental Darks pt3/3)

        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 with no reported problems.

    1.4 Completed Two Sets of STIS/CCD 9077 (Survey of the LMC Planetary 
Nebulae)

        The Space telescope Imaging Spectrograph (CCD) was used to perform 
a snapshot survey of all known LMC planetary nebulae {PNe} in order to 
study the co-evolution of the nebulae and their central stars, and to probe 
the chemical enrichment history of the LMC.  There were no reported problems.

    1.5 Completed Two Sets of STIS/CCD 8864 (CCD Dark Monitor-Part 2)

        The Space Telescope Imaging Spectrograph (CCD) was used to monitor 
the darks for the CCD.  The proposal completed nominally.

    1.6 Completed STIS/CCD 8911 (Sparse-Field CTE External C10)

        The Space Telescope Imaging Spectrograph (CCD) was used to 
determine the derivation of accurate coefficients which can be used to 
correct low count level data {both imaging and spectroscopy} for 
nonlinearity/CTE effects.  Dependencies on x-position, background sky 
level, and time dependence will be quantified in addition to accurate 
determination of intensity and y-position effects in a third epoch and to 
higher accuracy than previously determined.  The proposal completed with no 
reported problems.

    1.7 Completed Four Sets of 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.

    1.8 Completed STIS/CCD 8189 (The Source of Gamma Ray Bursts and the 
Nature of their Hosts)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
high resolution optical and ultraviolet observations of the Gamma Ray 
Burster (GRB) 990123 and its host galaxy.  This comprehensive set of 
observations will provide new insights into the astrophysics of GRBs and 
their high redshift host galaxies.  The observations were completed as 
planned, and no problems were reported.

    1.9 Completed Two Sets of STIS/CCD 9070 (A Census of Nuclear Star 
Clusters in Late-Type Spiral Galaxies: II. Spectroscopy and Stellar 
Populations)

        The Space Telescope Imaging Spectrograph (CCD) was used to 
investigate spiral galaxies that have a prominent star cluster in their 
dynamical center.  Statistics for cluster frequency, size, and luminosity 
remain incomplete.  The proposal completed as planned.

    1.10 Completed WF/PC-2 8815 (Cycle 9 Earth Flats)

        The WF/PC-2 was used to monitor flatfield stability.  This proposal 
obtains sequences of Earth streak flats to construct high quality flat 
fields for the WF/PC-2 filter set.  These flat fields will allow mapping of 
the OTA illumination pattern and will be used in conjunction with previous 
internal and external flats to generate new pipeline superflats.  The 
proposal completed nominally.

    1.11 Completed STIS/CCD 8865 (Bias Monitor-Part 2)

        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 with no anomalous activity.

    1.12 Completed WF/PC-2 9045 (The Relationship Between Radio Luminosity 
and Radio-Loud AGN Host Galaxy Properties)

        The WF/PC-2 was used to determine the relationship between the 
properties of the host galaxies of radio-loud AGN and their radio 
luminosities.  Previous studies in this area with the HST have concentrated 
on the 3C sample which shows a tight correlation between luminosity and 
redshift, such that evolutionary effects cannot be distinguished from those 
depending upon radio luminosity.  Our sample of 46 radio galaxies at z ~ 
0.5 comes from four complete, low-frequency-selected samples of radio 
sources with differing flux limits.  Thus the total sample spans an 
unprecedented three orders of magnitude in radio luminosity at a fixed 
redshift interval.  The proposal completed with no reported problems.

    1.13 Completed STIS/CCD 9285 (POMS Test Proposal: STIS Non-scripted 
Parallel Proposal Continuation III)

        The Space Telescope Imaging Spectrograph (CCD) was used to make low 
galactic latitude, non-scripted parallel observations as part of a POMS 
test proposal.  The observations were completed as planned, and no 
anomalies were reported.

    1.14 Completed WF/PC-2/STIS/CCD 9114 (SINS: The Supernova Intensive 
Study-- Cycle 10)

        The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were 
used to perform closer observations of supernovae that will create the 
chemical history of the Universe, energize the interstellar gas, stiffen 
the spine of the extragalactic distance scale and provide the only evidence 
for an accelerating universe.  A violent encounter is underway between the 
fast-moving debris and the stationary inner ring.  Monitoring this 
interaction will help solve the riddles of stellar evolution posed by the 
enigmatic three-ring system of SN 1987A.  Our UV observations of Ly- Alpha 
emission reveal the present location and velocity of a remarkable reverse 
shock that provides a unique laboratory for studying fast shocks and a 
powerful tool for dissecting the structure of the vanished star.  No 
problems were encountered.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions:  9
Successful:  9

  Scheduled Re-acquisitions:  7
Successful:  7

    2.2 FHST Updates:
Scheduled: 19
Successful: 19

    2.3 Operations Notes:

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

        Battery #5 temperature flags have been reported to the EPS Systems 
Engineer since 243/0017Z.  They continue to flag intermittently.  The 
Battery #5 recharge ratio has been in and out of limits.

        A TTR was written when a re-transmit was required at 243/083729Z 
during a 486 uplink.  ROP DF-18A was utilized at 243/0842Z to update the 
limits for the 486 engineering status buffer.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW