Paykari, P;
Kitching, T;
Hoekstra, H;
Azzollini, R;
Cardone, VF;
Cropper, M;
Duncan, CAJ;
... Zucca, E; + view all
(2020)
Euclid preparation: VI. Verifying the performance of cosmic shear experiments.
Astronomy & Astrophysics
, 635
, Article A139. 10.1051/0004-6361/201936980.
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Abstract
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.
| Type: | Article |
|---|---|
| Title: | Euclid preparation: VI. Verifying the performance of cosmic shear experiments |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1051/0004-6361/201936980 |
| Publisher version: | https://doi.org/10.1051/0004-6361/201936980 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | gravitational lensing: weak |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10094742 |
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