Reply to ``Comment on Model-dependence of Shapiro time delay and the `speed of gravity/speed of light' controversy''

Details Reply to ``Comment on Model-dependence of Shapiro time delay and the `speed of gravity/speed of light' controversy'' Reply to ``Comment on Model-dependence of Shapiro time delay and the `speed of gravity/speed of light' controversy''

2005-10-11

arxiv.org/abs/gr-qc/0510056v1

Class.Quant.Grav.22:5187-5190,2005

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

3 page reply to gr-qc/0510048

Scientific paper

10.1088/0264-9381/22/23/N02

To determine whether the Shapiro time delay of light passing near a moving object depends on the ``speed of gravity'' or the ``speed of light,'' one must analyze observations in a bimetric framework in which these two speeds can be different. In a recent comment (gr-qc/0510048), Kopeikin has argued that such a computation -- described in gr-qc/0403060 -- missed a hidden dependence on the speed of gravity. By analyzing the observables in the relevant bimetric model, I show that this claim is incorrect, and that the conclusions of gr-qc/0403060 stand.

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