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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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.
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| IITH Creators: |
| IITH Creators | ORCiD |
|---|
| Desai, Shantanu | http://orcid.org/0000-0002-0466-3288 |
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| Item Type: |
Article
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| 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://raiithold.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 |
| Related URLs: |
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