Measurement of the Solar Gravitational Deflection of Radio Waves Using Very-Long-Baseline Interferometry

Details Measurement of the Solar Gravitational Deflection of Radio Waves Using Very-Long-Baseline Interferometry Measurement of the Solar Gravitational Deflection of Radio Waves Using Very-Long-Baseline Interferometry

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phrvl..75.1439l&link_type=abstract

Physical Review Letters, Volume 75, Issue 8, August 21, 1995, pp.1439-1442

Physics

96

Scientific paper

We made very-long-baseline-interferometry observations of the extragalactic radio sources 3C273B and 3C279 to measure the gravitational deflection of radio waves by the Sun. Cross-correlation of data recorded at antennas in California and Massachusetts at 2, 8, and 23 GHz during a ten-day period surrounding the October 1987 solar occultation of 3C279 yielded plasma-corrected group delays, from which we obtained γ = 0.9996 +/- 0.0017 (estimated standard error), corresponding to a gravitational deflection 0.9998 +/- 0.0008 times that predicted by general relativity.

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