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Euclid preparation VI. Verifying the performance of cosmic shear experiments

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posted on 2023-06-07, 07:08 authored by P Paykari, T Kitching, H Hoekstra, R Azzollini, V F Cardone, M Cropper, C A J Duncan, A Kannawadi, L Miller, H Aussel, I F Conti, N Auricchio, M Baldi, S Bardelli, Giulio Fabbian, Euclid Collaboration, others
Aims. Our aim is to quantify the impact of systematic effects on the inference of cosmological parameters from cosmic shear. Methods. We present an “end-to-end” approach that introduces sources of bias in a modelled weak lensing survey on a galaxy-by-galaxy level. We propagated residual biases through a pipeline from galaxy properties at one end to cosmic shear power spectra and cosmological parameter estimates at the other end. We did this to quantify how imperfect knowledge of the pipeline changes the maximum likelihood values of dark energy parameters. Results. We quantify the impact of an imperfect correction for charge transfer inefficiency and modelling uncertainties of the point spread function for Euclid, and find that the biases introduced can be corrected to acceptable levels.

History

Publication status

  • Published

File Version

  • Published version

Journal

Astronomy and Astrophysics

ISSN

0365-0138

Publisher

EDP Sciences

Volume

635

Page range

1-18

Article number

a139

Pages

18.0

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2020-06-02

First Open Access (FOA) Date

2020-06-02

First Compliant Deposit (FCD) Date

2020-06-01

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