Dark energy survey year 3 results: weak lensing shape catalogue
M. Gatti, E. Sheldon, A. Amon, M. R. Becker, M. A. Troxel, A. Choi, C. Doux, N. MacCrann, A Navarro-Alsina, I. Harrison, D. Gruen, G. M. Bernstein, Mike Jarvis, L F Secco, A. Ferté, T. Shin, J. McCullough, R. P. Rollins, R Chen, C. Chang, Shivam Pandey, I. Tutusaus, J. Prat, J. Elvin-Poole, C. Sánchez, A. A. Plazas, A. Roodman, J. Zuntz, T. M. C. Abbott, M. Aguena, S. Allam, J. Annis, S. Àvila, David Bacon, E. Bertin, S Bhargava, D. Brooks, D. L. Burke, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, F. J. Castander, Christopher J. Conselice, M. Costanzi, M. Crocce, L. N. da Costa, T. M. Davis, J. De Vicente, S. Desai, H. T. Diehl, J. P. Dietrich, P. Doel, A. Drlica-Wagner, K. Eckert, S. Everett, I. Ferrero, J. Frieman, J. García-Bellido, D. W. Gerdes, T. Giannantonio, R. A. Gruendl, J. Gschwend, G. Gutiérrez, W. G. Hartley, S. R. Hinton, D L Hollowood, K. Honscheid, B. Hoyle, Eric Huff, Dragan Huterer, Bhuvnesh Jain, D. J. James, T. Jeltema, E. Krause, R. Kron, N. Kuropatkin, M. Lima, M. A. G. Maia, J. L. Marshall, R. Miquel, R. Morgan, J. Myles, A. Palmese, F. Paz-Chinchón, E. S. Rykoff, S. Samuroff, E. Sánchez, V. Scarpine, M. Schubnell, S. Serrano, I. Sevilla-Noarbe, M. Smith, M. Soares-Santos, E. Suchyta, M E C Swanson, G. Tarlé, D. Thomas, C. To, D. L. Tucker, T N Varga
Abstract
ABSTRACT We present and characterize the galaxy shape catalogue from the first 3 yr of Dark Energy Survey (DES) observations, over an effective area of 4143 deg2 of the southern sky. We describe our data analysis process and our self-calibrating shear measurement pipeline metacalibration, which builds and improves upon the pipeline used in the DES Year 1 analysis in several aspects. The DES Year 3 weak-lensing shape catalogue consists of 100 204 026 galaxies, measured in the riz bands, resulting in a weighted source number density of neff = 5.59 gal arcmin−2 and corresponding shape noise σe = 0.261. We perform a battery of internal null tests on the catalogue, including tests on systematics related to the point spread function (PSF) modelling, spurious catalogue B-mode signals, catalogue contamination, and galaxy properties.