Defining a weak lensing experiment in space

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 measuremen...

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Published in:Monthly notices of the Royal Astronomical Society 2013-06, Vol.431 (4), p.3103-3126
Main Authors: Cropper, Mark, Hoekstra, Henk, Kitching, Thomas, Massey, Richard, Amiaux, Jérôme, Miller, Lance, Mellier, Yannick, Rhodes, Jason, Rowe, Barnaby, Pires, Sandrine, Saxton, Curtis, Scaramella, Roberto
Format: Article
Language:English
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Astrophysics
Gravity
Measurement
Radiation
Sciences of the Universe
Star & galaxy formation
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cited_by cdi_FETCH-LOGICAL-c367t-5946e86bef83a778361df342db4a174ae8094b078bedced7be42e9000f3cc0b73
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container_end_page 3126
container_issue 4
container_start_page 3103
container_title Monthly notices of the Royal Astronomical Society
container_volume 431
creator Cropper, Mark
Hoekstra, Henk
Kitching, Thomas
Massey, Richard
Amiaux, Jérôme
Miller, Lance
Mellier, Yannick
Rhodes, Jason
Rowe, Barnaby
Pires, Sandrine
Saxton, Curtis
Scaramella, Roberto
description 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.
doi_str_mv 10.1093/mnras/stt384
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subjects Astrophysics
Gravity
Measurement
Radiation
Sciences of the Universe
Star & galaxy formation
title Defining a weak lensing experiment in space
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