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Title: The DES Science Verification Weak Lensing Shear Catalogs

We present weak lensing shear catalogs 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 catalogs of 2.12 million and 3.44 million galaxies respectively. We also 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. Furthermore, we discuss some of the planned algorithmic improvements that will be necessary to produce sufficiently accurate shear catalogs for the full 5-year DES, which is expected to cover 5000 square degrees.
  1. Univ. of Pennsylvania, Philadelphia, PA (United States). et al.
Publication Date:
OSTI Identifier:
Report Number(s):
FERMILAB-PUB-15-309-AE; BNL-112730-2016-JA
Journal ID: ISSN 1365-2966; arXiv eprint number arXiv:1507.05603; TRN: US1601624
Grant/Contract Number:
AC02-07CH11359; SC00112704; AC02-98CH10886; SC0007901; SC0007859
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society (Online)
Additional Journal Information:
Journal Name: Monthly Notices of the Royal Astronomical Society (Online); Journal Volume: 460; Journal Issue: 2; Journal ID: ISSN 1365-2966
Royal Astronomical Society
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
DES Collaboration
Country of Publication:
United States
79 ASTRONOMY AND ASTROPHYSICS; gravitational lensing: weak; methods: data analysis; techniques: image processing; catalogues; surveys; cosmology: observations