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September 2011 Gravitational Lensing Accuracy Testing 2010 (GREAT10) Challenge Handbook
Thomas Kitching, Sreekumar Balan, Gary Bernstein, Matthias Bethge, Sarah Bridle, Frederic Courbin, Marc Gentile, Alan Heavens, Michael Hirsch, Reshad Hosseini, Alina Kiessling, Adam Amara, Donnacha Kirk, Konrad Kuijken, Rachel Mandelbaum, Baback Moghaddam, Guldariya Nurbaeva, Stephane Paulin-Henriksson, Anais Rassat, Jason Rhodes, Bernhard Schölkopf, John Shawe-Taylor, Mandeep Gill, Marina Shmakova, Andy Taylor, Malin Velander, Ludovic van Waerbeke, Dugan Witherick, David Wittman, Stefan Harmeling, Catherine Heymans, Richard Massey, Barnaby Rowe, Tim Schrabback, Lisa Voigt
Ann. Appl. Stat. 5(3): 2231-2263 (September 2011). DOI: 10.1214/11-AOAS484


GRavitational lEnsing Accuracy Testing 2010 (GREAT10) is a public image analysis challenge aimed at the development of algorithms to analyze astronomical images. Specifically, the challenge is to measure varying image distortions in the presence of a variable convolution kernel, pixelization and noise. This is the second in a series of challenges set to the astronomy, computer science and statistics communities, providing a structured environment in which methods can be improved and tested in preparation for planned astronomical surveys. GREAT10 extends upon previous work by introducing variable fields into the challenge. The “Galaxy Challenge” involves the precise measurement of galaxy shape distortions, quantified locally by two parameters called shear, in the presence of a known convolution kernel. Crucially, the convolution kernel and the simulated gravitational lensing shape distortion both now vary as a function of position within the images, as is the case for real data. In addition, we introduce the “Star Challenge” that concerns the reconstruction of a variable convolution kernel, similar to that in a typical astronomical observation. This document details the GREAT10 Challenge for potential participants. Continually updated information is also available from


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Thomas Kitching. Sreekumar Balan. Gary Bernstein. Matthias Bethge. Sarah Bridle. Frederic Courbin. Marc Gentile. Alan Heavens. Michael Hirsch. Reshad Hosseini. Alina Kiessling. Adam Amara. Donnacha Kirk. Konrad Kuijken. Rachel Mandelbaum. Baback Moghaddam. Guldariya Nurbaeva. Stephane Paulin-Henriksson. Anais Rassat. Jason Rhodes. Bernhard Schölkopf. John Shawe-Taylor. Mandeep Gill. Marina Shmakova. Andy Taylor. Malin Velander. Ludovic van Waerbeke. Dugan Witherick. David Wittman. Stefan Harmeling. Catherine Heymans. Richard Massey. Barnaby Rowe. Tim Schrabback. Lisa Voigt. "Gravitational Lensing Accuracy Testing 2010 (GREAT10) Challenge Handbook." Ann. Appl. Stat. 5 (3) 2231 - 2263, September 2011.


Published: September 2011
First available in Project Euclid: 13 October 2011

zbMATH: 1228.62164
MathSciNet: MR2884938
Digital Object Identifier: 10.1214/11-AOAS484

Keywords: cosmology , imaging processing , statistical inference

Rights: Copyright © 2011 Institute of Mathematical Statistics

Vol.5 • No. 3 • September 2011
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