Status Report

NASA Hubble Space Telescope Daily Report #4786

By SpaceRef Editor
February 16, 2009
Filed under , ,


Continuing to collect World Class Science

PERIOD COVERED: 5am February 5 – 5am February 6, 2009 (DOY 036/1000z-037/1000z)


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.

S/C 4974


The Transient Response Test is for the periodic performance monitoring of the FGS 2R servo A mechanism.

WFPC2 11967

WFPC2 Imaging of the Lockman Hole

In order to understand galaxy evolution and constrain theoretical models, we require both multiwavelength photometry (to robustly determine physical parameters such as star formation rates and stellar masses) and detailed morphological information. Galaxy morphology encodes crucial information about galaxy formation history and the physical processes that trigger star formation and AGN activity, and high-resolution imaging for large samples of galaxies is currently only obtainable with HST. The Lockman Hole has been the target of extensive multi-wavelength observations from the X-ray to the radio, and will be the target of the deepest wide-area blankfield thermal IR observations with Herschel, but currently lacks comprehensive HST imaging. We propose to obtain WFPC2 imaging of ~500 arcmin2 of the central region of the Lockman Hole in F606W and F814W, to a depth of V606~26.8 and I814~26. This imaging is crucial in order to characterize the sources detected at other wavelengths.


Significant Spacecraft Anomalies: (The following are preliminary reports of potential non-nominal performance that will be investigated.)

HSTARS: (None)


18400-0 – Transient Response Trending Test (TRTT) #21


                        SCHEDULED      SUCCESSFUL

FGS GSacq               05                  05
FGS REacq               04                  04
OBAD with Maneuver      22                  22


The Transient Response Trending Test (TRTT) was successfully completed this morning at 036/15:07

SpaceRef staff editor.