Phys. Rev. Lett. 75, 1439–1442 (1995)Measurement of the Solar Gravitational Deflection of Radio Waves Using Very-Long-Baseline InterferometryReceived 14 April 1995; published in the issue dated 21 August 1995 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. © 1995 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.75.1439
DOI:
10.1103/PhysRevLett.75.1439
PACS:
04.80.Cc, 95.85.Bh
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