HUBBLE SPACE TELESCOPE

       DAILY REPORT #2974

PERIOD COVERED:  0000Z (UTC) 10/10/01 - 0000Z (UTC) 10/11/01

Daily Status Report as of 284/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed WF/PC-2 9042 (An Archive To Detect The Progenitors Of 
Massive, Core-Collapse Supernovae)

         The WF/PC-2 was used to search for supernovae which have massive 
star progenitors.  The already extensive HST archive and high-resolution 
ground-based images of galaxies within ~20 Mpc enables us to resolve and 
quantify their individual bright stellar content.  As massive, evolved 
stars are the most luminous single objects in a galaxy, the progenitors of 
core-collapse supernovae should be directly detectable on pre-explosion 
images.  One Type II progenitor has been observed this year, and the 
investigators have proposed a short, companion WFPC2 proposal to confirm 
this candidate and identify a second.  The observations completed nominally.

    1.2 Completed Two Sets of 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.

    1.3 Completed Three 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 Two Sets of WF/PC-2 8059 (POMS Test Proposal: Targeted 
Parallel Archive Proposal)

        The WF/PC-2 was used to observe the parallel opportunities 
available in the neighborhood of bright galaxies are treated in a slightly 
different way from the normal pure parallels.  Local Group galaxies offer 
the opportunity for a closer look at young stellar 
populations.  Narrow-band images in F656N can be used both to identify 
young stars via their emission lines, and to map the gas distribution in 
star-forming regions.  The observations completed nominally.

    1.5 Completed Two Sets of STIS/CCD/MA1/MA2 9176 (LMC Eclipsing Binaries 
with Cepheid Components: The Key to the Extragalactic Distance Scale)

        The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was 
used to determine the distance to the LMC and to observe the Cepheid P-L 
that form the backbone of the Cosmic Distance Scale and the determination 
of H_degrees.  Unfortunately, in spite of concerted efforts of many 
investigators, the zero point of the Cepheid P-L law and the LMC distance 
remain controversial and uncertain to ~10-15, using eclipsing binaries 
{EBs} as "standard candles'' to include two recently discovered LMC 
eclipsing binaries {EBs} with Cepheid components.  These observations of 
these extraordinary systems hold the key to determining simultaneously the 
Cepheid P-L zero point and the LMC distance, and to provide a direct test 
of the Baade-Wesselink parallax method.  There were no reported problems.

    1.6 Completed Two Sets of STIS/MA1/MA2 8920 (Cycle 10 MAMA Dark 
Measurements)

        The Space Telescope Imaging Spectrograph (MA1 and MA2) was used to 
perform the routine monitoring of the MAMA detector dark noise, and is the 
primary means of checking on health of the MAMA detectors systems through 
frequent monitoring of the background count rate.  The proposal completed 
with no reported anomalous activity.

    1.7 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.

    1.8 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.

    1.9 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.

    1.10 Completed STIS/CCD/MA1 9304 (Ultraviolet Spectroscopy of the 
Unexpected Outburst of WZ Sagittae)

        The Space Telescope Imaging Spectrograph (CCD and MA1) was used to 
observe the extreme dwarf nova WZ Sge that unexpectedly went into outburst 
on July 23, 2001, ten years earlier than anticipated.  This event offers 
the chance to obtain high-quality, time-resolved far-UV spectra, as the 
outburst continues through its peak into decline.  The observations 
completed with no reported problems.

    1.11 Completed Five Sets of 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.

    1.12 Completed 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.

    1.13 Completed STIS/CCD 9066 (Closing in on the Hydrogen Reionization 
Edge of the Universe)

        The Space Telescope Imaging Spectrograph (CCD) was used in parallel 
constrain the Hydrogen reionization edge in emission that marks the 
transition from a neutral to a fully ionized IGM at a predicted 
redshifts.  As described in 2.1 and HSTAR 8364, the acquisition for this 
proposal defaulted to fine lock backup on one FGS only, possibly affecting 
eight observations.  Otherwise, the proposal completed with no additional 
problems.

    1.14 Completed WF/PC-2 8882 (Chandra and HST Observations of the 
Brightest Cluster Lenses)

        The WF/PC-2 was used in conjunction with Chandra to perform 
observations of the four X-ray brightest, cooling-flow clusters with bright 
gravitational arcs, newly identified from the ROSAT XBACS/BCS lensing 
study.  As described in 2.1 and HSTAR 8364, the acquisition for this 
proposal defaulted to fine lock backup on one FGS only, possibly affecting 
thirty-two observations.  Otherwise, the observations completed with no 
other reported problems.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions:  6
Successful:  6

        The acquisition at 283/143808Z defaulted to fine lock backup on 
FGS-2 only when the scan step limit was exceeded on FGS-3.  HSTAR 8364 was 
written.  The proposals detailed in 1.13 and 1.14 may have been affected.
  Scheduled Re-acquisitions:  9
Successful:  9

    2.2 FHST Updates:
Scheduled: 14
Successful: 14

    2.3 Operations Notes:

        The SSR EDAC error counter was cleared three times as directed by 
ROP SR-1A.

        The STIS MCE-1 reset at 283/204154Z while the low voltage was on 
and while outside any SAA interval.  Using ROP NS-12, the STIS flight 
software error counter was cleared at 283/2044Z.  MAMA-1 was recovered at 
284/0806Z via normally scheduled SMS commanding.

        There was a STIS EMC retry at 283/2317Z.  The STIS flight software 
error counter was cleared at 284/0001Z per ROP SR-12.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Joint Integrated Simulation #1 (Rendezvous/Capture) will be 
conducted today, starting at 9:00 am and continuing to approximately 8:30 pm.

        Continuation of normal science observations and calibrations.

/CAW