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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Abstract
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 |
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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: | 02 Jul 2019 19:54 |
URI: | http://sro.sussex.ac.uk/id/eprint/61696 |
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📧 Request an updateProject Name | Sussex Project Number | Funder | Funder Ref |
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Astrophysics and Cosmology - Sussex Consolidated Grant | G1291 | STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL | ST/L000652/1 |