The DES Science Verification Weak Lensing Shear Catalogues
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.
Cite
@article{arxiv.1507.05603,
title = {The DES Science Verification Weak Lensing Shear Catalogues},
author = {M. Jarvis and E. Sheldon and J. Zuntz and T. Kacprzak and S. L. Bridle and A. Amara and R. Armstrong and M. R. Becker and G. M. Bernstein and C. Bonnett and C. Chang and R. Das and J. P. Dietrich and A. Drlica-Wagner and T. F. Eifler and C. Gangkofner and D. Gruen and M. Hirsch and E. M. Huff and B. Jain and S. Kent and D. Kirk and N. MacCrann and P. Melchior and A. A. Plazas and A. Refregier and B. Rowe and E. S. Rykoff and S. Samuroff and C. Sánchez and E. Suchyta and M. A. Troxel and V. Vikram and T. Abbott and F. B. Abdalla and S. Allam and J. Annis and A. Benoit-Lévy and E. Bertin and D. Brooks and E. Buckley-Geer and D. L. Burke and D. Capozzi and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and F. J. Castander and J. Clampitt and M. Crocce and C. E. Cunha and C. B. D'Andrea and L. N. da Costa and D. L. DePoy and S. Desai and H. T. Diehl and P. Doel and A. Fausti Neto and B. Flaugher and P. Fosalba and J. Frieman and E. Gaztanaga and D. W. Gerdes and R. A. Gruendl and G. Gutierrez and K. Honscheid and D. J. James and K. Kuehn and N. Kuropatkin and O. Lahav and T. S. Li and M. Lima and M. March and P. Martini and R. Miquel and J. J. Mohr and E. Neilsen and B. Nord and R. Ogando and K. Reil and A. K. Romer and A. Roodman and M. Sako and E. Sanchez and V. Scarpine and M. Schubnell and I. Sevilla-Noarbe and R. C. Smith and M. Soares-Santos and F. Sobreira and M. E. C. Swanson and G. Tarle and J. Thaler and D. Thomas and A. R. Walker and R. H. Wechsler},
journal= {arXiv preprint arXiv:1507.05603},
year = {2016}
}
Comments
Accepted by MNRAS; 38 pages, 29 figures; v3: minor edits based on referee's comments, switched to mnras style, added figure 8, updated info about released catalogs