VLBI Imaging of the Extragalactic Reference Sources for the Guide Star of the Gravity Probe B Mission

Details VLBI Imaging of the Extragalactic Reference Sources for the Guide Star of the Gravity Probe B Mission VLBI Imaging of the Extragalactic Reference Sources for the Guide Star of the Gravity Probe B Mission

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..340..526l&link_type=abstract

Future Directions in High Resolution Astronomy: The 10th Anniversary of the VLBA, ASP Conference Proceedings, Vol. 340. Edited

Astronomy and Astrophysics

Astronomy

2

Scientific paper

We have regularly observed at 8.4 GHz one to three extragalactic radio sources as references for the astrometric campaign on the guide star HR 8703 (IM Pegasi) in support of the NASA-Stanford gyroscope relativity mission, Gravity Probe B. We present a selection of the images of these sources produced from observations between January 1997 and November 2002. We discuss the observed source structures and examine their possible effects on our astrometric results for HR 8703.

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