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A simple and practical algorithm for accurate gravitational magnification maps


Walters, SJ and Forbes, LK, A simple and practical algorithm for accurate gravitational magnification maps, Astronomical Society of Australia. Publications, 34 Article e006. ISSN 1448-6083 (2017) [Refereed Article]

Copyright Statement

Copyright 2017 Astronomical Society of Australia

DOI: doi:10.1017/pasa.2016.62


In this brief communication, a new method is outlined for modelling magnification patterns on an observerís plane using a first-order approximation to the null geodesic path equations for a point mass lens. For each ray emitted from a source, an explicit calculation is made for the change in position on the observerís plane due to each lens mass. By counting the number of points in each small area of the observerís plane, the magnification at that point can be determined. This allows for a very simple and transparent algorithm. A short Matlab code sample for creating simple magnification maps due to multiple point lenses is included in an appendix.

Item Details

Item Type:Refereed Article
Keywords:gravitational lensing, planets and satellites, detection, micro methods, analytical methods,
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Stellar astronomy and planetary systems
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the mathematical sciences
UTAS Author:Walters, SJ (Mr Stephen Walters)
UTAS Author:Forbes, LK (Professor Larry Forbes)
ID Code:116474
Year Published:2017
Funding Support:Australian Research Council (DP140100094)
Web of Science® Times Cited:1
Deposited By:Mathematics and Physics
Deposited On:2017-05-10
Last Modified:2018-04-27

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