A second-order approximation to equatorial null geodesics in the Kerr metric - Application to light deflection in eclipsing compact binaries
We present a second-order analytical expansion of null equatorial geodesics in the Kerr metric. The equations developed are applied to the study of light transit in compact binary systems. We show that the effects arising from path bending have a significant influence on the computed time delays, even at first order of approximation in the
Goicoechea, L. J. et al.
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11
1992