HUBBLE SPACE TELESCOPE

   DAILY REPORT #2804

PERIOD COVERED:  0000Z (UTC) 02/07/01 - 0000Z (UTC) 02/08/01

Daily Status Report as of 039/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed Two Sets of STIS/CCD 8837 (CCD Dark Monitor-Part 1)

        The Space Telescope Imaging Spectrograph (CCD) was used to monitor=
=20
the darks.  The proposal completed with no reported problems.

    1.2 Completed WF/PC-2 8599 (A Census of Nuclear Star Clusters in=20
Late-Type Spiral Galaxies)

        The WF/PC-2 was used to conduct an I-band snapshot survey of a=20
well-defined sample of nearby, face-on spiral galaxies of type Scd or=20
later.  The proposal completed nominally.

    1.3 Completed Two Sets of STIS/CCD 8838 (Bias Monitor - Part 1)

        The Space Telescope Imaging Spectrograph (CCD) was used to monitor=
=20
the bias in the 1x1, 1x2, 2x1, and 2x2 bin settings at gain=3D1, and 1x1 at=
=20
gain =3D 4, to build up high-S/N superbiases and track the evolution of hot=
=20
columns.  The proposal completed nominally.

    1.4 Completed STIS/CCD/MA1 8684 (Emission Lines from Photoionized=20
Accretion Disks and Winds in AGNs)

        The Space Telescope Imaging Spectrograph (CCD and MA1) was used to=
=20
observe the origin and dynamics of the gas that produces the broad optical=
=20
and ultraviolet emission lines in AGNs, a fundamental gap that remains in=20
our knowledge of AGNs.  The proposal completed with no reported problems.

    1.5 Completed TwoSets of WF/PC-2 8805 (POMS Test Proposal: WFII=20
Parallel Archive Proposal Continuation)

        The WF/PC-2 was used to perform a generic target version of the=20
WFPC2 Archival Pure Parallel program.  The program will be used to take=20
parallel images of random areas of the sky, following the recommendations=20
of the Parallels Working Group.  The proposal completed with no reported=20
problems.

    1.6 Completed STIS/MA1 8721 (An UV Imaging Survey of IR-Bright Star-=20
Forming Galaxies)

        The Space Telescope Imaging Spectrograph (MA1) was used to carry=20
out a UV {~1, 600 Angstrom} snapshot imaging survey of all the actively=20
star-forming galaxies detected by ISO at Lambda>170 Mum and closer than=20
cz=3D9000 km/s.  The sample covers a large region in the parameter's space=
 of=20
morphology, luminosity, metallicity, and star formation intensity.  There=20
were no reported anomalies.

    1.7 Completed STIS/CCD/MA1/MA2 8857 (MAMA Sensitivity and Focus Monitor=
 C9)

        The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was=20
used to monitor the sensitivity of each MAMA grating mode to detect any=20
change due to contamination or other causes.  There were no problems.

    1.8 Completed WF/PC-2 8587 (Stroemgren Photometry of Globular Clusters=
=20
in M87: Breaking the Age- Metallicity Degeneracy)

        The WF/PC-2 was used to further demonstrate that the globular=20
cluster {GC} systems of most, and possibly all, luminous galaxies show=20
bimodal distributions in broadband color and, by implication, age and/or=20
metallicity.  Whatever its origin, this bimodality {which is observed in=20
giant galaxies that span a wide range in Hubble Type and local environment}=
=20
must hold a fundamental clue to the process of galaxy formation.  The=20
technique of this proposal hinges on the ability of Stroemgren photometry=20
to decouple the effects of age and metallicity for large samples of GCs,=20
and will provide the first strong constraints on the various galaxy=20
formation models.  There were no reported problems.

    1.9 Completed STIS/CCD 8562 (Probing the Large Scale Structure: Cosmic=
=20
Shear Observations)

        The Space Telescope Imaging Spectrograph (CCD) was used to probe=20
the distortion of light bundles from distant galaxies, looking at the=20
statistical properties of the intervening inhomogeneous {dark} matter=20
distribution.  The proposal completed nominally.

    1.10 Completed WF/PC-2/STIS/CCD 8679 (Constraining the Age of the=20
Oldest Stars from the White Dwarf Cooling Sequence in M4)

        The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were=
=20
used to search for the oldest and hence coolest white dwarfs {WDs} in M4,=20
the nearest Galactic globular cluster to the Sun.  New models for cooling=20
hydrogen white dwarfs predict that their colors should become bluer, rather=
=20
than redder, with increasing age. The goal is to test these models and at=20
the same time constrain the age of M4.  The proposal completed with no=20
problems.

    1.11 Completed Two Sets of WF/PC-2 8827 (Cycle 9 Supplemental Darks=
 pt2/3)

        The WF/PC-2 was used to obtain three dark frames every day to=20
provide data for monitoring and characterizing the evolution of hot=20
pixels.  The proposal completed nominally.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 5
Successful: 5

  Scheduled Re-acquisitions: 9
Successful: 9

    2.2 FHST Updates:
Scheduled: 12
Successful: 12

    2.3 Operations Notes:


=B7       HSTAR 8073 Unassigned B string Science Data Handler (SDH) disk=20
failure 038/06:20z.  Sys Admin reported failure.
=B7       HSTAR 8074 Unassigned B string software startup is unsuccessful=20
with SDH down 038/14:00z.


3.0 SIGNIFICANT FORTHCOMING EVENTS:
=B7       Continuation of normal science observations and calibrations.

/CAW