The DES Science Verification weak lensing shear catalogues

Jarvis, M, Sheldon, E, Zuntz, J, Kacprzak, T, Bridle, S L, Amara, A, Armstrong, R, Becker, M R, Bernstein, G M, Bonnett, C, Chang, C, Das, R, Dietrich, J P, Drlica-Wagner, A, Eifler, T F, Gangkofner, C, Gruen, D, Hirsch, M, Huff, E M, Jain, B, Kent, S, Kirk, D, MacCrann, N, Melchior, P, Plazas, A A, Refregier, A, Rowe, B, Rykoff, E S, Samuroff, S, Sánchez, C, Suchyta, E, Troxel, M A, Vikram, V, Abbott, T, Abdalla, F B, Allam, S, Annis, J, Benoit-Lévy, A, Bertin, E, Brooks, D, Buckley-Geer, E, Burke, D L, Capozzi, D, Carnero Rosell, A, Carrasco Kind, M, Carretero, J, Castander, F J, Clampitt, J, Crocce, M, Cunha, C E, D'Andrea, C B, da Costa, L N, DePoy, D L, Desai, S, Diehl, H T, Doel, P, Fausti Neto, A, Flaugher, B, Fosalba, P, Frieman, J, Gaztanaga, E, Gerdes, D W, Gruendl, R A, Gutierrez, G, Honscheid, K, James, D J, Kuehn, K, Kuropatkin, N, Lahav, O, Li, T S, Lima, M, March, M, Martini, P, Miquel, R, Mohr, J J, Neilsen, E, Nord, B, Ogando, R, Reil, K, Romer, A K, Roodman, A, Sako, M, Sanchez Garcia, E, Scarpine, V, Schubnell, M, Sevilla-Noarbe, I, Smith, R C, Soares-Santos, M, Sobreira, F, Swanson, M E C, Tarle, G, Thaler, J, Thomas, D, Walker, A R and Wechsler, R H (2016) The DES Science Verification weak lensing shear catalogues. Monthly Notices of the Royal Astronomical Society, 460 (2). pp. 2245-2281. ISSN 0035-8711

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We present weak lensing shear catalogues for 139 square degrees of data taken during the Science Verification (SV) time for the new Dark Energy Camera (DECam) being used for the Dark Energy Survey (DES). We describe our object selection, point spread function estimation and shear measurement procedures using two independent shear pipelines, IM3SHAPE and NGMIX, which produce catalogues of 2.12 million and 3.44 million galaxies respectively. We detail a set of null tests for the shear measurements and find that they pass the requirements for systematic errors at the level necessary for weak lensing science applications using the SV data. We also discuss some of the planned algorithmic improvements that will be necessary to produce sufficiently accurate shear catalogues for the full 5-year DES, which is expected to cover 5000 square degrees.

Item Type: Article
Keywords: Gravitational lensing: weak, Methods: data analysis, Techniques: image processing, Catalogues, Surveys, Cosmology: observations
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QB Astronomy
Depositing User: Richard Chambers
Date Deposited: 23 Jun 2016 14:42
Last Modified: 28 Mar 2017 10:34

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Project NameSussex Project NumberFunderFunder Ref
Astrophysics and Cosmology - Sussex Consolidated GrantG1291STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/L000652/1