Fast simulations of extragalactic microlensing

  title={Fast simulations of extragalactic microlensing},
  author={Vyacheslav N. Shalyapin and Rodrigo Gil-Merino and Luis J. Goicoechea},
  journal={Astronomy and Astrophysics},
We present a new and very fast method for producing microlensing magnification maps at high optical depths. It is based on the combination of two approaches: (a) the two-dimensional Poisson solver for a deflection potential and (b) inverse polygon mapping. With our method we extremely reduce the computing time for the generation of magnification patterns and avoid the use of highly demanding computer resources. For example, the generation of a magnification map of size 2000 x 2000 pixels… 

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An Improved GPU-based Ray-shooting Code for Gravitational Microlensing
An improved inverse ray-shooting code based on GPUs for generating microlensing magnification maps is presented, which has greatly reduced the running time while maintaining high accuracy and the speed has been increased by about 100 times.


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