Dark energy survey year 3 results: weak lensing shape catalogue. Issue 3 (5th April 2021)

• Record Type: Journal Article
• Authors: Gatti, M; Sheldon, E; Amon, A; Becker, M; Troxel, M; Choi, A; Doux, C; MacCrann, N; Navarro-Alsina, A; Harrison, I; Gruen, D; Bernstein, G; Jarvis, M; Secco, L F; Ferté, A; Shin, T; McCullough, J; Rollins, R P; Chen, R; Chang, C; Pandey, S; Tutusaus, I; Prat, J; Elvin-Poole, J; Sanchez, C; Plazas, A A; Roodman, A; Zuntz, J; Abbott, T M C; Aguena, M; Allam, S; Annis, J; Avila, S; Bacon, D; Bertin, E; Bhargava, S; Brooks, D; Burke, D L; Carnero Rosell, A; Carrasco Kind, M; Carretero, J; Castander, F J; Conselice, C; Costanzi, M; Crocce, M; da Costa, L N; Davis, T M; De Vicente, J; Desai, S; Diehl, H T; Dietrich, J P; Doel, P; Drlica-Wagner, A; Eckert, K; Everett, S; Ferrero, I; Frieman, J; García-Bellido, J; Gerdes, D W; Giannantonio, T; Gruendl, R A; Gschwend, J; Gutierrez, G; Hartley, W G; Hinton, S R; Hollowood, D L; Honscheid, K; Hoyle, B; Huff, E M; Huterer, D; Jain, B; James, D J; Jeltema, T; Krause, E; Kron, R; Kuropatkin, N; Lima, M; Maia, M A G; Marshall, J L; Miquel, R; Morgan, R; Myles, J; Palmese, A; Paz-Chinchón, F; Rykoff, E S; Samuroff, S; Sanchez, E; Scarpine, V; Schubnell, M; Serrano, S; Sevilla-Noarbe, I; Smith, M; Soares-Santos, M; Suchyta, E; Swanson, M E C; Tarle, G; Thomas, D; To, C; Tucker, D L; Varga, T N; Wechsler, R H; Weller, J; Wester, W; Wilkinson, R D;
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 504:Issue 3(2021)
• Page Start: 4312
• Page End: 4336
• Publication Date: 2021-04-05
• Subjects: gravitational lensing: weak -- methods: data analysis -- techniques: image processing -- catalogues -- surveys -- cosmology: observations; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stab918
• Languages: English
• ISSNs: 0035-8711

Abstract

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 deg 2 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 n eff = 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.