Dark energy survey year 3 results: Weak lensing shape catalogue

Gatti, M and Desai, S. et al (2021) Dark energy survey year 3 results: Weak lensing shape catalogue. Monthly Notices of the Royal Astronomical Society, 504 (3). pp. 4312-4336. ISSN 00358711

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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.

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IITH Creators:
IITH CreatorsORCiD
Desai, Shantanuhttp://orcid.org/0000-0002-0466-3288
Item Type: Article
Uncontrolled Keywords: catalogues, cosmology, observations, gravitational lensing, weak, methods, data analysis, surveys, techniques, image processing
Subjects: Physics
Divisions: Department of Physics
Depositing User: Mrs Haseena VKKM
Date Deposited: 09 Dec 2021 05:47
Last Modified: 18 Feb 2022 05:49
URI: http://raiith.iith.ac.in/id/eprint/9027
Publisher URL: https://academic.oup.com/mnras/article/504/3/4312/...
OA policy: https://v2.sherpa.ac.uk/id/publication/24618
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