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Defining a weak lensing experiment in space

Cropper, M.; Hoekstra, H.; Kitching, T.; Massey, R.; Amiaux, J.; Miller, L.; Mellier, Y.; Rhodes, J.; Rowe, B.; Pires, S.; Saxton, C.; Scaramella, R.

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Authors

M. Cropper

H. Hoekstra

T. Kitching

J. Amiaux

L. Miller

Y. Mellier

J. Rhodes

B. Rowe

S. Pires

C. Saxton

R. Scaramella



Abstract

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.

Citation

Cropper, M., Hoekstra, H., Kitching, T., Massey, R., Amiaux, J., Miller, L., …Scaramella, R. (2013). Defining a weak lensing experiment in space. Monthly Notices of the Royal Astronomical Society, 431(4), 3103-3126. https://doi.org/10.1093/mnras/stt384

Journal Article Type Article
Publication Date Jun 1, 2013
Deposit Date Jun 30, 2014
Publicly Available Date Mar 29, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 431
Issue 4
Pages 3103-3126
DOI https://doi.org/10.1093/mnras/stt384
Keywords Gravitational lensing: weak, Methods: statistical, Space vehicles: instruments, Cosmological parameters, Cosmology: observations.
Related Public URLs http://arxiv.org/abs/1210.7691

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Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society © 2013 The Authors Published by Oxford University Press on behalf of Royal Astronomical Society. All rights reserved.





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