HUBBLE SPACE TELESCOPE - Continuing to collect World Class
Science
DAILY REPORT #4754
PERIOD COVERED: 5am December 10 - 5am December 11, 2008
(DOY
345/1000z-346/1000z)
OBSERVATIONS SCHEDULED
ACS/SBC 11110
Searching for Lyman Apha Emission from FUSE Lyman
Continuum Candidates
We have recently been granted time on FUSE to characterize
the escape
fraction of hydrogen Lyman continuum (Lyc) photons from a
morphologically diverse set of star forming galaxies. The
FUSE program
is designed to provide ~ 5 sigma detections of Lyc photons
emitted from
star forming galaxies with escape fractions ~5%. With this
proposal we
seek hydrogen Lyman alpha (Lya) observations of a
representative subset
of the FUSE program targets to constrain the observational
relationship
between Lyc, Lya, and hydrogen Balmer line emission in
these systems.
Such observations explore the detailed balance between the
simple
optically thin (Case A) and optically thick (Case B)
limits in
recombination theory. The ultimate goal of this program is
to quantify
the relationship between escaping Lya and Lyc emission and
the first
structures that form in the early universe.
FGS 11942
Increasing the Accuracy of HST Astrometry with FGS1R
We propose to observe six exoplanetary system host stars
and two
planetary nebulae central stars with FGS1r. All objects
have been
previously observed under proposals GO-09233, -09969,
-10989, and
-11210. These observations will significantly extend the
time baseline,
permitting improvements in the determination of proper
motion. This
systematic motion must be removed to get at the
perturbation of
interest, either due to exoplanetary companions or the
orbital motion of
the Earth (parallax). In most cases the perturbation
orbits will also
improve. We improve either companion mass or PN parallax.
For one
target, GJ 876, theoretical dynamical modelers have
proposed an
inclination closer to 50 degrees, while FGS3 measurements
indicated an
inclination closer to 84 degrees. These new data, once
combined with our
older FGS3 data, will permit an independent remeasurement
of the
inclination of the outermost companion, and a
re-evaluation of widely
used dynamical algorithms.
FLIGHT OPERATIONS SUMMARY:
Significant Spacecraft Anomalies: (The following are
preliminary reports
of potential non-nominal performance that will be
investigated.)
HSTARS: (None)
COMPLETED OPS REQUEST:
18370-0 - Adjust NCS CPL Setpoint
COMPLETED OPS NOTES:
1760-0 - Monitor NCS CPL for Indication of Flood
SCHEDULED SUCCESSFUL
FGS GSacq 06 06
FGS REacq 05 05
OBAD with Maneuver 22 22
SIGNIFICANT EVENTS:
FLASH Report: MIL Engineering Test
MIL Engineering
Test Pass was successfully executed at
345/19:41 - 19:51.