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Images for a Binary Gravitational Lens from a Single Real Algebraic Equation

Hideki Asada

astro-pharXiv:astro-ph/0206267

Abstract

It is shown that the lens equation for a binary gravitational lens being a set of two coupled real fifth-order algebraic equations (equivalent to a single complex equation of the same order) can be reduced to a single real fifth-order algebraic equation, which provides a much simpler way to study lensing by binary objects.

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