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The DES Science Verification weak lensing shear catalogues

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posted on 2023-06-09, 01:52 authored by M Jarvis, E Sheldon, J Zuntz, T Kacprzak, S L Bridle, A Amara, R Armstrong, M R Becker, G M Bernstein, C Bonnett, C Chang, R Das, J P Dietrich, A Drlica-Wagner, T F Eifler, C Gangkofner, D Gruen, M Hirsch, E M Huff, B Jain, S Kent, D Kirk, N MacCrann, P Melchior, A A Plazas, A Refregier, B Rowe, E S Rykoff, S Samuroff, C Sánchez, E Suchyta, M A Troxel, V Vikram, T Abbott, F B Abdalla, S Allam, J Annis, A Benoit-Lévy, E Bertin, D Brooks, E Buckley-Geer, D L Burke, D Capozzi, A Carnero Rosell, M Carrasco Kind, J Carretero, F J Castander, J Clampitt, M Crocce, C E Cunha, C B D'Andrea, L N da Costa, D L DePoy, S Desai, H T Diehl, P Doel, A Fausti Neto, B Flaugher, P Fosalba, J Frieman, E Gaztanaga, D W Gerdes, R A Gruendl, G Gutierrez, K Honscheid, D J James, K Kuehn, N Kuropatkin, O Lahav, T S Li, M Lima, M March, P Martini, R Miquel, J J Mohr, E Neilsen, B Nord, R Ogando, K Reil, Kathy RomerKathy Romer, A Roodman, M Sako, E Sanchez Garcia, V Scarpine, M Schubnell, I Sevilla-Noarbe, R C Smith, M Soares-Santos, F Sobreira, M E C Swanson, G Tarle, J Thaler, D Thomas, A R Walker, R H Wechsler
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.

Funding

Astrophysics and Cosmology - Sussex Consolidated Grant; G1291; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/L000652/1

History

Publication status

  • Published

File Version

  • Published version

Journal

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

Publisher

Oxford University Press

Issue

2

Volume

460

Page range

2245-2281

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-06-23

First Open Access (FOA) Date

2016-06-23

First Compliant Deposit (FCD) Date

2016-06-23

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