Estimate of the accuracy of the linear-caustic approximation in analyses of gravitational microlensing observations |
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| Authors: | M B Bogdanov |
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| Institution: | 1. N.G. Chernyshevskii State University, Saratov, Russia
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| Abstract: | The amplification coefficient for gravitational lensing of a point source in the linear-caustic approximation is compared with exact values calculated for a lens comprised of two point masses. Even in the most favorable case for the caustic crossing, the error in the amplification coefficient remains below 1% only for distances to the caustic not exceeding 0.01 of the Einstein radius. |
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