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Euclid preparation VI. Verifying the performance of cosmic shear experiments
journal contribution
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, othersAims. 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.
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Publication status
- Published
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- Published version
Journal
Astronomy and AstrophysicsISSN
0365-0138Publisher
EDP SciencesExternal DOI
Volume
635Page range
1-18Article number
a139Pages
18.0Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2020-06-02First Open Access (FOA) Date
2020-06-02First Compliant Deposit (FCD) Date
2020-06-01Usage metrics
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