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- W2100690564 abstract "To determine the magnification of an extended source caused by gravitational lensing one has to perform a two-dimensional integral over point-source magnifications in general. Since the point-source magnification jumps to an infinite value on caustics, special care is required. For a uniformly bright source, it has been shown earlier that the calculation simplifies if one determines the magnification from the area of the images of the extended source by applying Green's theorem so that one ends up with a one-dimensional integration over the image boundaries. This approach is discussed here in detail, and it is shown that it can be used to yield a robust and efficient method also for limb-darkened sources. It is also shown that the centroid shift can be calculated in a similar way." @default.
- W2100690564 created "2016-06-24" @default.
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- W2100690564 date "1998-04-06" @default.
- W2100690564 modified "2023-09-27" @default.
- W2100690564 title "A robust and efficient method for calculating the magnification of extended sources caused by gravitational lenses" @default.
- W2100690564 hasPublicationYear "1998" @default.
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