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3D cosmic shear: cosmology from CFHTLenS

Journal article published in 2014 by Td D. Kitching, Af F. Heavens, J. Alsing, T. Erben, C. Heymans, H. Hildebrandt, H. Hoekstra, A. Jaffe, A. Kiessling, Y. Mellier, L. Miller, L. van Waerbeke, J. Benjamin, J. Coupon, L. Fu and other authors.
This paper is available in a repository.
This paper is available in a repository.

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Abstract

This paper presents the first application of 3D cosmic shear to a wide-field weak lensing survey. 3D cosmic shear is a technique that analyses weak lensing in three dimensions using a spherical harmonic approach, and does not bin data in the redshift direction. This is applied to CFHTLenS, a 154 square degree imaging survey with a median redshift of 0.7 and an effective number density of 11 galaxies per square arcminute usable for weak lensing. To account for survey masks we apply a 3D pseudo-Cl approach on weak lensing data, and to avoid uncertainties in the highly non-linear regime, we separately analyse radial wave numbers k