Gatti, M;
Sheldon, E;
Amon, A;
Becker, M;
Troxel, M;
Choi, A;
Doux, C;
... Wilkinson, RD; + view all
(2021)
Dark energy survey year 3 results: weak lensing shape catalogue.
Monthly Notices of the Royal Astronomical Society
, 504
(3)
pp. 4312-4336.
10.1093/mnras/stab918.
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Abstract
We present and characterize the galaxy shape catalogue from the first 3 yr of Dark Energy Survey (DES) observations, over an effective area of 4143 deg2 of the southern sky. We describe our data analysis process and our self-calibrating shear measurement pipeline METACALIBRATION, which builds and improves upon the pipeline used in the DES Year 1 analysis in several aspects. The DES Year 3 weak-lensing shape catalogue consists of 100 204 026 galaxies, measured in the riz bands, resulting in a weighted source number density of neff = 5.59 gal arcmin−2 and corresponding shape noise σe = 0.261. We perform a battery of internal null tests on the catalogue, including tests on systematics related to the point spread function (PSF) modelling, spurious catalogue B-mode signals, catalogue contamination, and galaxy properties.
| Type: | Article |
|---|---|
| Title: | Dark energy survey year 3 results: weak lensing shape catalogue |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stab918 |
| Publisher version: | https://doi.org/10.1093/mnras/stab918 |
| 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. |
| 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 Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10129947 |
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