Solar gravitational deflection of radio waves measured by very-long-baseline interferometry

Details Solar gravitational deflection of radio waves measured by very-long-baseline interferometry Solar gravitational deflection of radio waves measured by very-long-baseline interferometry

Dec 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974phrvl..33.1621c&link_type=abstract

Physical Review Letters, vol. 33, Dec. 30, 1974, p. 1621-1623

Astronomy and Astrophysics

Astronomy

25

Deflection, Gravitational Effects, Microwave Interferometers, Radio Sources (Astronomy), Solar Gravitation, Error Analysis, Least Squares Method, Occultation, Phase Shift, Relativity

Scientific paper

Utilizing a four-antenna technique, simultaneous observations were made, at each end of an 845-km baseline, of the radio sources 3C279 and 3C273B, which are 10 deg apart in the sky. Differences in interferometric phases at 3.7-cm wavelength monitored near the time of the 1972 occultation of 3C279 by the sun, yielded a gravitational deflection of 0.99 plus or minus 0.03 times the value predicted by general relativity, corresponding to gamma = 0.98 plus or minus 0.06 (standard error).

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