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Daily Report #4754



 
 
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Old December 11th 08, 03:23 PM posted to sci.astro.hubble
Cooper, Joe
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Default Daily Report #4754

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.


 




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