Phys. Rev. Lett. 75, 1439 - 1442 (1995)Measurement of the Solar Gravitational Deflection of Radio Waves Using Very-Long-Baseline Interferometry |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1981: |
D. E. Lebach1, B. E. Corey2, I. I. Shapiro1, M. I. Ratner1, J. C. Webber2, A. E. E. Rogers2, J. L. Davis1, and T. A. Herring3
1Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138
2Northeast Radio Observatory Corporation, Haystack Observatory, Westford, Massachusetts 01886
3Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
Received 14 April 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/abstract/PRL/v75/p1439
DOI: 10.1103/PhysRevLett.75.1439
PACS: 04.80.Cc, 95.85.Bh
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