Dark Energy Survey Year 3 Results: Weak Lensing Shape Catalogue

Gatti, M.; Sheldon, E.; Amon, A.; Becker, M.; Troxel, M.; Choi, A.; Doux, C.; Maccrann, N.; Navarro Alsina, A.; Harrison, I.; Gruen, D.; Bernstein, G.; Jarvis, M.; Secco, L. F.; Ferté, A.; Shin, T.; Mccullough, J.; Rollins, R. P.; Chen, R.; Chang, C.; Pandey, S.; Tutusaus, I.; Prat, J.; Elvin-Poole, J.; Sanchez, C.; Plazas, A. A.; Roodman, A.; Zuntz, J.; Abbott, T. M. C.; Aguena, M.; Allam, S.; Annis, J.; Avila, S.; Bacon, D.; Bertin, E.; Bhargava, S.; Brooks, D.; Burke, D. L.; Carnero Rosell, A.; Carrasco Kind, M.; Carretero, J.; Castander, F. J.; Conselice, C.; Costanzi, M.; da Costa, L. N.; Davis, T. M.; De Vicente, J.; Desai, S.; Diehl, H. T.; Dietrich, J. P.; Doel, P.; Drlica-Wagner, A.; Eckert, K.; Everett, S.; Ferrero, I.; Frieman, J.; García-Bellido, J.; Gerdes, D. W.; Giannantonio, T.; Gruendl, R. A.; Gschwend, J.; Gutierrez, G.; Hartley, W. G.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; Hoyle, B.; Huff, E. M.; Huterer, D.; Jain, B.; James, D. J.; Jeltema, T.; Krause, E.; Kron, R.; Kuropatkin, N.; Lima, M.; Maia, M. A. G.; Marshall, J. L.; Miquel, R.; Morgan, R.; Myles, J.; Palmese, A.; Paz-Chinchón, F.; Rykoff, E. S.; Samuroff, S.; Sanchez, E.; Scarpine, V.; Schubnell, M.; Serrano, S.; Sevilla-Noarbe, I.; Smith, M.; Suchyta, E.; Swanson, M. E. C.; Tarle, G.; Thomas, D.; To, C.; Tucker, D. L.; Varga, T. N.; Wechsler, R. H.; Weller, J.; Wester, W.; Wilkinson, R. D.

doi:10.1093/mnras/stab918

We present and characterise the galaxy shape catalogue from the first 3 years of Dark Energy Survey (DES) observations, over an effective area of ~4143 deg$^2$ 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 $n_{ m eff} = 5.59$ gal/arcmin$ ^{2}$ and corresponding shape noise $sigma_e = 0.261$. 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....