im2shape: Bayesian Galaxy Shape Estimation
Abstract
im2shape is a Bayesian approach to the problem of accurate measurement of galaxy ellipticities for weak lensing studies, in particular cosmic shear. im2shape parameterizes galaxies as sums of Gaussians, convolved with a psf which is also a sum of Gaussians. The uncertainties in the output parameters are calculated using a Markov Chain Monte Carlo approach.
- Publication:
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Astrophysics Source Code Library
- Pub Date:
- July 2013
- Bibcode:
- 2013ascl.soft07006B
- Keywords:
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- Software