Recent VLBA/VERA/IVS tests of general relativity

@article{Fomalont2009RecentVT,
  title={Recent VLBA/VERA/IVS tests of general relativity},
  author={Edward Fomalont and Sergei M. Kopeikin and D. Llanwyn Jones and Mareki Honma and Oleg Titov},
  journal={Proceedings of the International Astronomical Union},
  year={2009},
  volume={5},
  pages={291 - 295}
}
Abstract 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… 
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References

SHOWING 1-10 OF 10 REFERENCES

The Measurement of the Light Deflection from Jupiter: Experimental Results

We have determined the relativistic light deflection of the quasar J0842+1835 as Jupiter passed within 3.′7 on 2002 September 8, by measuring the time delay using the Very Long Baseline Array (VLBA)…

Fourth Test of General Relativity

Recent advances in radar astronomy have made possible a fourth test of Einstein's theory of general relativity. The test involves measuring the time delays between transmission of radar pulses…

A test of general relativity using radio links with the Cassini spacecraft

A measurement of the frequency shift of radio photons to and from the Cassini spacecraft as they passed near the Sun agrees with the predictions of standard general relativity with a sensitivity that approaches the level at which, theoretically, deviations are expected in some cosmological models.

Measurement of the solar gravitational deflection of radio waves using geodetic very-long-baseline interferometry data, 1979-1999.

We used very-long-baseline interferometry (VLBI) to measure the deflection by the Sun of radio waves emanating from distant compact radio sources. This bending is characterized in the parametrized…

The effect of the motion of the Sun on the light-time in interplanetary relativity experiments

In 2002, a measurement of the effect of solar gravity upon the phase of coherent microwave beams passing near the Sun was carried out by the Cassini mission, allowing a very accurate measurement of…

Testing the Relativistic Effect of the Propagation of Gravity by Very Long Baseline Interferometry

It is shown that the finite speed of gravity affects very long baseline interferometric observations of quasars during the time of their line-of-sight close angular encounter with Jupiter. The next…

On the two approaches to the data analysis of the Cassini interplanetary relativity experiment

Gravimagnetic effect of the barycentric motion of the Sun and determination of the post-Newtonian parameter γ in the Cassini experiment

First Fringe Detection with VERA's Dual-Beam System and Its Phase-Referencing Capability

We present the results of the first dual-beam observations with VERA (VLBI Exploration of Radio Astrometry). The observations of a pair of H2O maser sources, W 49N and OH 43.8−0.1, were carried out…

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