LensMEM: A Gravitational Lens Inversion Algorithm Using the Maximum Entropy Method

 
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Wallington, Sylvanie
Kochanek, Christopher S.
Narayan, Ramesh
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https://doi.org/10.1086/177401
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Wallington, Sylvanie, Christopher S. Kochanek, and Ramesh Narayan. 1996. “LensMEM: A Gravitational Lens Inversion Algorithm Using the Maximum Entropy Method.” The Astrophysical Journal 465 (July): 64. https://doi.org/10.1086/177401.
Abstract
We present a new algorithm for inverting poorly resolved gravitational lens systems using the maximum entropy method. We test the method with simulations and then apply it to an 8 CHz VLA map of the radio ring lens MG 1654+134. We model the lens as a singular isothermal sphere embedded in an external shear held and find that the critical radius of the lens is b = 0 ''.9820, the dimensionless shear is gamma = 0.0771, and the position angle of the shear is theta = 100 degrees.8. These results are consistent with the results obtained by Kochanek using a complementary inversion algorithm based on Clean.
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http://nrs.harvard.edu/urn-3:HUL.InstRepos:41384904

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