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Defining a weak lensing experiment in space

Cropper, Mark and Hoekstra, Henk and Kitching, Thomas and Massey, Richard and Amiaux, Jérôme and Miller, Lance and Mellier, Yannick and Rhodes, Jason and Rowe, Barnaby and Pires, Sandrine and Saxton, Curtis and Scaramella, Roberto (2013) Defining a weak lensing experiment in space. Monthly Notices of the Royal Astronomical Society, 431 (4). pp. 3103-3126. ISSN 0035-8711. doi:10.1093/mnras/stt384.

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This paper describes the definition of a typical next-generation space-based weak gravitational lensing experiment. We first adopt a set of top-level science requirements from the literature, based on the scale and depth of the galaxy sample, and the avoidance of systematic effects in the measurements which would bias the derived shear values. We then identify and categorize the contributing factors to the systematic effects, combining them with the correct weighting, in such a way as to fit within the top-level requirements. We present techniques which permit the performance to be evaluated and explore the limits at which the contributing factors can be managed. Besides the modelling biases resulting from the use of weighted moments, the main contributing factors are the reconstruction of the instrument point spread function, which is derived from the stellar images on the image, and the correction of the charge transfer inefficiency in the CCD detectors caused by radiation damage.

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Additional Information:© 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2013 February 27. Received 2013 February 27; in original form 2012 October 16. First published online: April 9, 2013. We thank Rene Laureijs, Pierre Ferruit, Tim Oosterbroek and Ludovic Duvet at ESA for their support. We also thank Elisabetta Semboloni for her comments on the paper. We acknowledge the referee who made some valuable suggestions which improved the accessibility of this paper. HH is supported by the Netherlands Organization for Scientific Research through VIDI grants and acknowledges support from the Netherlands Research School for Astronomy (NOVA). TDK was supported by a Royal Astronomical Society 2010 Fellowship and now by a Royal Society University Research Fellowship. RM is supported by a Royal Society University Research Fellowship. RM and HH also acknowledge support from ERC International Reintegration Grants. BR acknowledges support from European Research Council in the form of a Starting Grant with number 240672. JR was supported by JPL, run by Caltech under a contract for NASA.
Funding AgencyGrant Number
Netherlands Organization for Scientific Research (NWO)UNSPECIFIED
Netherlands Research School for Astronomy (NOVA)UNSPECIFIED
Royal Astronomical Society 2010 FellowshipUNSPECIFIED
Royal Society University Research FellowshipUNSPECIFIED
ERC International Reintegration GrantsUNSPECIFIED
European Research Council Starting Grant240672
Subject Keywords:gravitational lensing: weak; methods: statistical; space vehicles: instruments; cosmological parameters; cosmology: observations
Issue or Number:4
Record Number:CaltechAUTHORS:20130708-130810417
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39248
Deposited On:09 Jul 2013 14:02
Last Modified:09 Nov 2021 23:43

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