Two-point Padé [2,2] approximants accurately approximate the light deflection angle in the Schwarzschild metric for all impact parameters above the critical value, with a simpler quadratic option for mid-range cases.
Post-post-newtonian deflection of light by the sun
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The paper reviews standard derivations of light deflection in curved spacetime and presents a unified geometric approach for static and rotating gravitational fields.
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Two-Point Pad\'{e} Approximants for the Deflection of Light in the Schwarzschild Black Hole Metric
Two-point Padé [2,2] approximants accurately approximate the light deflection angle in the Schwarzschild metric for all impact parameters above the critical value, with a simpler quadratic option for mid-range cases.
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Weak Gravitational Lensing: A Brief Overview
The paper reviews standard derivations of light deflection in curved spacetime and presents a unified geometric approach for static and rotating gravitational fields.