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Title

Handbook for the GREAT08 challenge: an image analysis competition for cosmological lensing

Author(s)

Bridle, Sarah;  Shawe-Taylor, John;  Amara, Adam;  Applegate, Douglas;  Balan, Sreekumar T.;  Berge, Joel;  Bernstein, Gary;  Dahle, Hakon;  Erben, Thomas;  Gill, Mandeep;  Heavens, Alan;  Heymans, Catherine;  High, F. William;  Hoekstra, Henk;  Jarvis, Mike;  Kirk, Donnacha;  Kitching, Thomas;  Kneib, Jean-Paul;  Kuijken, Konrad;  Lagattuta, David;  Mandelbaum, Rachel;  Massey, Richard;  Mellier, Yannick;  Moghaddam, Baback;  Moudden, Yassir;  Nakajima, Reiko;  Paulin-Henriksson, Stephane;  Pires, Sandrine;  Rassat, Anais;  Refregier, Alexandre;  Rhodes, Jason;  Schrabback, Tim;  Semboloni, Elisabetta;  Shmakova, Marina;  van Waerbeke, Ludovic;  Witherick, Dugan;  Voigt, Lisa;  Wittman, David

Abstract

The GRavitational lEnsing Accuracy Testing 2008 (GREAT08) Challenge focuses on a problem that is of crucial importance for future observations in cosmology. The shapes of distant galaxies can be used to determine the properties of dark energy and the nature of gravity, because light from those galaxies is bent by gravity from the intervening dark matter. The observed galaxy images appear distorted, although only slightly, and their shapes must be precisely disentangled from the effects of pixelisation, convolution and noise. The worldwide gravitational lensing community has made significant progress in techniques to measure these distortions via the Shear TEsting Program (STEP). Via STEP, we have run challenges within our own community, and come to recognise that this particular image analysis problem is ideally matched to experts in statistical inference, inverse problems and computational learning. Thus, in order to continue the progress seen in recent years, we are seeking an infusion of new ideas from these communities. This document details the GREAT08 Challenge for potential participants.

Publication type

Journal article

Source

Annals of Applied Statistics, Vol. 3, no. 1 (Mar 2009), pp. 6-37

Publication year

2009

FOR Code(s)

0104 Statistics

Keyword(s)

Cosmology;  Gravitational lensing;  GRavitational lEnsing Accuracy Testing 2008 challenge;  GREAT08 challenge

Publisher

Institute of Mathematical Statistics

ISSN

1932-6157

Publisher URL

http://dx.doi.org/10.1214/08-AOAS222

Publisher URL

http://www.great08challenge.info

Copyright

Copyright © Institute of Mathematical Statistics, 2009. The published version is reproduced in accordance with the copyright policy of the publisher.

Additional information

David Lagattuta is incorrectly named on the paper as 'David Lagatutta'. This error has been corrected in this record to facilitate ease of its discovery.

Full text

Peer reviewed