The Ray Bundle method for calculating weak magnification by gravitational lenses

Details The Ray Bundle method for calculating weak magnification by gravitational lenses The Ray Bundle method for calculating weak magnification by gravitational lenses

1998-12-16

arxiv.org/abs/astro-ph/9812300v1

Astronomy and Astrophysics

Astrophysics

9 pages Latex, 8 figures, submitted to MNRAS

Scientific paper

10.1046/j.1365-8711.1999.02534.x

We present here an alternative method for calculating magnifications in gravitational lensing calculations -- the Ray Bundle method. We provide a detailed comparison between the distribution of magnifications obtained compared with analytic results and conventional ray-shooting methods. The Ray Bundle method provides high accuracy in the weak lensing limit, and is computationally much faster than (non-hierarchical) ray shooting methods to a comparable accuracy. The Ray Bundle method is a powerful and efficient technique with which to study gravitational lensing within realistic cosmological models, particularly in the weak lensing limit.

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