Dark Energy Survey Year 6 results: cell-based coadds and metadetection weak lensing shape catalogue
Year: 2025
Type: article
Abstract: ABSTRACT We present the metadetection weak lensing galaxy shape catalogue from the 6-yr Dark Energy Survey (DES Y6) imaging data. This data set is the final release from DES, spanning 4422 deg$^2$ of the southern sky. We describe how the catalogue was constructed, including the two new major processing steps, cell-based image coaddition, and shear measurements with metadetection. The DES Y6 M etadetection weak lensing shape catalogue consists of 151 922 791 galaxies detected over $riz$ bands, with an effective number density of $n_{\rm eff}$ = 8.22 galaxies per arcmin$^2$ and shape noise of $\sigma _{\rm e} = 0.29$. We carry out a suite of validation tests on the catalogue, including testing for point spread function (PSF) leakage, testing for the impact of PSF modelling errors, and testing the correlation of the shear measurements with galaxy, PSF, and survey properties. In addition to demonstrating that our catalogue is robust for weak lensing science, we use the DES Y6 image simulation suite to estimate the overall multiplicative shear bias of our shear measurement pipeline. We find no detectable multiplicative bias at the roughly half-per cent level, with $m = (3.4 \pm 6.1) \times 10^{-3}$, at $3\sigma$ uncertainty. This is the first time both cell-based coaddition and M etadetection algorithms are applied to observational data, paving the way to the Stage-IV weak lensing surveys.
Authors: M Yamamoto, M R Becker, E Sheldon, M Jarvis, R A Gruendl, F Menanteau, E S Rykoff, S Mau, T Schutt, M Gatti, M A Troxel, A Amon, D Anbajagane, G M Bernstein, D Gruen, E M Huff, M Tabbutt, A Tong, B Yanny, T M C Abbott, M Aguena, A Alarcon, F Andrade-Oliveira, K Bechtol, J Blazek, D Brooks, A Carnero Rosell, J Carretero, C Chang, A Choi, M Costanzi, M Crocce, L N da Costa, T M Davis, J De Vicente, S Desai, H T Diehl, S Dodelson, P Doel, C Doux, A Drlica-Wagner, A Ferté, B Flaugher, P Fosalba, J Frieman, J García-Bellido, E Gaztanaga, G Giannini, G Gutierrez, W G Hartley, K Herner, S R Hinton, D L Hollowood, K Honscheid, D Huterer, E Krause, K Kuehn, O Lahav, M Lima, J L Marshall, J Mena-Fernández, R Miquel, J J Mohr, J Muir, J Myles, R L C Ogando, A Pieres, A A Plazas Malagón, A Porredon, J Prat, M Raveri, M Rodriguez-Monroy, A Roodman, S Samuroff, E Sanchez, D Sanchez Cid, V Scarpine, I Sevilla-Noarbe, M Smith, M Soares-Santos, E Suchyta, G Tarle, V Vikram, N Weaverdyck, P Wiseman, Y Zhang
Institutions: Duke University, Princeton University, Argonne National Laboratory, Brookhaven National Laboratory, University of Pennsylvania, University of Illinois Urbana-Champaign, National Center for Supercomputing Applications, SLAC National Accelerator Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, University of Chicago, Ludwig-Maximilians-Universität München, California Institute of Technology, Jet Propulsion Laboratory, University of Wisconsin–Madison, Fermi National Accelerator Laboratory, Cerro Tololo Inter-American Observatory, NSF NOIRLab, Laboratório Interinstitucional de e-Astronomia, Institute of Space Sciences, University of Zurich, Northeastern University, University College London, Universidad de La Laguna, Instituto de Astrofísica de Canarias, Institute for High Energy Physics, Barcelona Institute of Science and Technology, Goddard Space Flight Center, University of Trieste, Trieste Astronomical Observatory, Institute for Fundamental Physics of the Universe, National Institute for Astrophysics, Institut d'Estudis Espacials de Catalunya, The University of Queensland, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Indian Institute of Technology Hyderabad, Centre National de la Recherche Scientifique, Institut National de Physique Nucléaire et de Physique des Particules, Université Grenoble Alpes, Consejo Superior de Investigaciones Científicas, Instituto de Física Teórica, Universidad Autónoma de Madrid, University of Portsmouth, University of Geneva, University of California, Santa Cruz, The Ohio State University, University of Michigan, University of Arizona, Lowell Observatory, Australian Astronomical Optics, Universidade de São Paulo, Texas A&M University, Laboratoire de Physique Subatomique et de Cosmologie, Institució Catalana de Recerca i Estudis Avançats, Max Planck Institute for Extraterrestrial Physics, Perimeter Institute, University of Cincinnati, National Observatory, Ruhr University Bochum, Stockholm University, KTH Royal Institute of Technology, Istituto Nazionale di Fisica Nucleare, Sezione di Genova, University of Genoa, Lancaster University, Oak Ridge National Laboratory, Central University of Kerala, Lawrence Berkeley National Laboratory, University of California, Berkeley, University of Southampton
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,046
Funders: National Science Foundation, U.S. Department of Energy, University of Pennsylvania, Ohio State University, University of Chicago, University of Portsmouth, Centres de Recerca de Catalunya, University of Cambridge, University College London, European Commission, University of Sussex, Deutsche Forschungsgemeinschaft, Generalitat de Catalunya, Ministério da Ciência, Tecnologia e Inovação, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Institute of Environmental Science and Research, Financiadora de Estudos e Projetos, Ministerio de Ciencia e Innovación, Institut de Física d'Altes Energies, University of Illinois at Urbana-Champaign, Office of Science, Science and Technology Facilities Council, European Regional Development Fund, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, High Energy Physics, Integrated Electronics Engineering Center, Binghamton University, Argonne National Laboratory, Fermilab, Lawrence Berkeley National Laboratory, SLAC National Accelerator Laboratory
Awards: G102163711, G1054097061, G1055550527, G107546177, G1313983767, G1336129044, G1664757510, G1746333638, PROPOSAL TO EXPLORE THE FUNDAMENTAL CONSTITUENTS OF THE UNIVERSE FUNDING YEARS FY 2018-2020, G2011917337, G2233160401, G2287611682, G2376186588, G2554159582, G262962599, RESEARCH IN HIGH ENERGY PHYSICS AT DUKE UNIVERSITY, G302750986, G3075337988, G3154116105, G3439265645, G3479632140, The Dark Energy Survey Data Management Operations, G3870743921, G3906089732, G4158950854, G4269941704, G454676879, G4655338613, G498139845, G513797252, G5560389312, G5574724152, RESEARCH IN HIGH ENERGY PHYSICS AT THE UNIVERSITY OF PENNSYLVANIA, G6256534168, G6471802762, G6513613686, G656518222, G6676276723, ACCURATE DARK ENERGY CONSTRAINTS VIA THE PRECISE CHARACTERIZATION OF GALAXY INTRINSIC ALIGNMENT COUPLED WITH SHEAR AND REDSHIFT INTERFERENCE, G6848031779, G6918803902, G6941735741, G7617409577, G7696246063, G7788408655, G7835623888, G8284171658, Collaborative Research: The Dark Energy Survey Data Management Operations, G8581667079, G8755702448, G8920660035, G946511789, G969889393, G993149817
OpenAlex ID: W4414628535