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Recent VLBA/VERA/IVS tests of general relativity

Published online by Cambridge University Press:  06 January 2010

Ed Fomalont ,
Sergei Kopeikin ,
Dayton Jones ,
Mareki Honma  and
Oleg Titov
Ed Fomalont
Affiliation:
National Radio Astronomy Observatory, 520 Edgemont Rd, Charlottesville, VA 22903, USA email: efomalon@nrao.edu
Sergei Kopeikin
Affiliation:
Dept. of Physics & Astronomy, University of Missouri-Columbia, 223 Physics Bldg., Columbia, MO 65211, USA email: kopeikins@missouri.edu
Dayton Jones
Affiliation:
Jet Propulsion Laboratory, 4800 Oak Grove Ave, Pasadena, CA 91109, USA email: dayton.jones@jpl.nasa.gov
Mareki Honma
Affiliation:
VERA Project Office, Mizusawa VLBI Observatory, NAOJ, 181-8588, Tokyo, Japan email: mareki.honma@nao.ac.jp
Oleg Titov
Affiliation:
Geoscience, Australia, GPO Box 378, Canberra, ACT 2601, Australia email: Oleg.Titov@ga.gov.au
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Abstract

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We report on recent VLBA/VERA/IVS observational tests of General Relativity. First, we will summarize the results from the 2005 VLBA experiment that determined gamma with an accuracy of 0.0003 by measuring the deflection of four compact radio sources by the solar gravitational field. We discuss the limits of precision that can be obtained with VLBA experiments in the future. We describe recent experiments using the three global arrays to measure the aberration of gravity when Jupiter and Saturn passed within a few arcmin of bright radio sources. These reductions are still in progress, but the anticipated positional accuracy of the VLBA experiment may be about 0.01 mas.

Keywords

gravitation—quasars: individual (3C279)—relativity techniques: interferometric
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S261: Relativity in Fundamental Astronomy: Dynamics, Reference Frames, and Data Analysis , April 2009 , pp. 291 - 295
Copyright
Copyright © International Astronomical Union 2010

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