HUBBLE SPACE TELESCOPE

       DAILY REPORT #3003

PERIOD COVERED:  0000Z (UTC) 11/21/01 - 0000Z (UTC) 11/23/01

Daily Status Report as of 327/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 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.

    1.2 Completed Three Sets of WF/PC-2 8942 (Cycle 10 Intflat Sweeps and 
Linearity Test)

        The WF/PC-2 was used to monitor the pixel-to-pixel flatfield 
response and provide a linearity check.  These intflat sequences are done 
once during the year and the images will provide a backup database in the 
event of complete failure of the visflat lamp as well as allow monitoring 
of the gain ratios.  There were no reported problems.

    1.3 Completed STIS/CCD/MA1/MA2 8916 (Spectroscopic Sensitivity Workout: 
First-order Modes)

        The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was 
used to measure the basic sensitivity for all supported MAMA and CCD 
first-order spectroscopic modes.  Sensitivity measurements are done for all 
supported tilts of the gratings, at a S/N suitable to any particular 
setting, in order to get all measurements done in a reasonable number of 
orbits but still get a very accurate sensitivity measurement.  There were 
no reported problems.

    1.4 Completed Five 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.

    1.5 Completed Seven 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.

    1.6 Completed Two Sets of FGS/1 9175 (The Best Brown Dwarf Yet?: FGS 
Astrometry of the Companion to the Hyades Eclipsing Binary V471 Tau)

        Fine Guidance Sensor #1 was used to perform observations of V471 
Tau over the next 3 years {2 HST orbits/year} to determine its astrometric 
orbit.  These HST observations, when combined with Hipparcos astrometry and 
the light time orbit, will unambiguously yield the orbital inclination and 
the mass of a possible brown dwarf.  The identification of a brown dwarf in 
V471 Tau will provide the first direct dynamical mass determination of a 
brown dwarf with a known age, chemical composition, and distance.  As 
mentioned in 2.3, at least one observation in the second iteration of this 
proposal failed.  Otherwise, it is believed that all other observations 
completed nominally.

    1.7 Completed Four Sets of 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.

    1.8 Completed Four Sets of STIS/CCD 8910 (Sparse Field CTE 
Test-Internal {Cycle 10})

        The Space Telescope Imaging Spectrograph (CCD) was used to perform 
CTE measurements that are made using the "sparse field test", along both 
the serial and parallel axes.  This program needs special commanding to 
provide {a} off-center MSM positionings of some slits, and {b} the ability 
to read out with any amplifier {A, B, C, or D}.  No problems were encountered.

    1.9 Completed FGS/1 9168 (The Distances to AM CVn Stars)

        Fine Guidance Sensor (FGS) #1 was used to determine the parallaxes 
and proper motions of the five brightest of the seven known AM CVn 
systems.  AM CVn systems are binaries where mass is transferred from a 
completely hydrogen-deficient, degenerate mass donor to a white dwarf 
primary through a helium accretion disk.  A better understanding of these 
systems is crucial for a number of reasons: (1) to study the late stages of 
binary evolution, (2) to study the effect of chemical composition on the 
physics of accretion discs, (3) to estimate their contribution to the 
Supernovae Ia rate, and (4) to estimate their contribution to the 
gravitational radiation background.  All observations completed with no 
reported problems.

    1.10 Completed WF/PC-2 9129 (Evolution of the Bow Shock in the Guitar 
Nebula)

        The WF/PC-2 was used to take observations of the Guitar Nebula, a 
bow shock produced by the high-velocity pulsar B2224+65.  By comparison 
with a previous observation in 1994, a new narrow-band H-alpha image will 
allow exploitation of the change in pulsar location {~1"}, in order to: {a} 
quantify ambient interstellar density variations on scales <=10^-3 pc that 
perturb the shape of the bowshock near the contact discontinuity {size 
~0.2"}; and {b} better model the bowshock to determine the orientation of 
the pulsar velocity vector.  No problems were reported.

    1.11 Completed Nine 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.

    1.12 Completed Five 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.

    1.13 Completed STIS/CCD 9312 (POMS Test Proposal: STIS Non-scripted 
Parallel Proposal Continuation IV)

        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 Two Sets of 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.  The proposal completed uneventfully.

    1.15 Completed Three Sets of STIS/CCD/MA2 9105 (Determination of the 
Distances and Masses of 3 Galactic Cepheids)

        The Space Telescope Imaging Spectrograph (CCD and MA2) was used to 
continue a successful observing strategy which enabled the proposers to 
accurately measure angular separations < 10^-2'' with the FOC for binaries 
with Cepheid primaries and main sequence B or A star secondaries {our 
accuracy should improve to ~10^-3'' with STIS}.  Once measurements are 
available at two carefully selected phases and these are combined with 
spectroscopic orbits, the angular information will enable the masses and 
distances for the binaries to be determined from Newton's laws and 
Euclidean geometry.  The distances determinations amount to bypassing two 
rungs of the cosmic distance ladder: the moving-cluster distance to the 
Hyades and main sequence fitting of clusters containing Cepheids.  The mass 
determinations will provide the first direct dynamical mass measurements 
for Cepheids, providing sorely needed quantitative information on this 
poorly understood stage of massive star evolution.  The proposal completed 
with no reported problems.

    1.16 Completed Three 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.

    1.17 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.

    1.18 Completed STIS/CCD/MA2 9119 (Io's Prometheus Plume, and the 
Composition and Spatial Distribution of Io's Atmosphere)

        The Space Telescope Imaging Spectrograph (CCD and MA2) was used to 
obtain the most detailed view yet of Io's dynamic SO_2 / S_2 atmosphere, 
and the first spectroscopic observations of a Prometheus-type plume, to 
test models of plume and atmospheric chemistry and dynamics.  The proposal 
completed a splanned.

    1.19 Completed Two Sets of WF/PC-2 9138 (Host Galaxies of 
Gravitationally Lensed Quasars)

        The WF/PC-2 was used to perform imaging studies of quasar host 
galaxies at high redshift that are biased toward detecting luminous 
hosts.  Gravitational lensing combined with optical and near-IR imaging 
enhances their detectivity and has nearly doubled the number of known hosts 
at z>1.  Lens studies have successfully imaged hosts with lower 
luminosities at farther distances beneath a larger fraction of quasars than 
imaging of non- lensed quasars.  We propose deep WFPC2 follow-up imaging of 
five lensed systems in the F555W and F814W filters, which offer unique 
opportunities for detailed studies of faint, high-redshift, quasar 
hosts.  The proposal completed as planned.

    1.20 Completed STIS/CCD 8908 (CCD Imaging Flats C10)

        The Space Telescope Imaging Spectrograph (CCD) was used to 
investigate flat-field stability over a monthly period.  The proposal 
completed with no reported problems.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 17
Successful: 17

  Scheduled Re-acquisitions: 15
Successful: 15

    2.2 FHST Updates:
Scheduled: 34
Successful: 32

        Per HSTAR 8402, the full maneuver update scheduled at 325/162145Z 
failed due to tracker 3.  The following acquisition was successful.

        The update at 327/081153Z failed.

    2.3 Operations Notes:

        Using ROP SR-1A, the SSR EDAC error counter was cleared three times.

        The engineering status buffer limits were adjusted twice per ROP 
DF-18A.

        The shift supervisor's report stated that at least one astrometry 
observation (at 326.0640Z) in the proposal described in 1.6 failed.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW