924 citations · 2.9k across the 27 of their papers we have counts for
4 papers · 1 filter
The POINT-AGAPE Survey: Comparing Automated Searches of Microlensing Events toward M31
Y. Tsapras, B. J. Carr, M. J. Weston +4
Searching for microlensing in M31 using automated superpixel surveys raises a number of difficulties which are not present in more conventional techniques. Here we focus on the pro…
Results of the GREAT08 Challenge: An image analysis competition for cosmological lensing
Sarah Bridle, Sreekumar T. Balan, Matthias Bethge +31
We present the results of the GREAT08 Challenge, a blind analysis challenge to infer weak gravitational lensing shear distortions from images. The primary goal was to stimulate new…
Cosmic Shear Systematics: Software-Hardware Balance
A. Amara, A. Refregier, S. Paulin-Henriksson
Cosmic shear measurements rely on our ability to measure and correct the Point Spread Function (PSF) of the observations. This PSF is measured using stars in the field, which give…
Optimal PSF modeling for weak lensing: complexity and sparsity
S. Paulin-Henriksson, A. Refregier, A. Amara
We investigate the impact of point spread function (PSF) fitting errors on cosmic shear measurements using the concepts of complexity and sparsity. Complexity, introduced in a prev…