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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
European Commission
European Research Council
Financiadora de Estudos e Projetos
Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
High Energy Physics
Higher Education Funding Council for England
Institut de Física d'Altes Energies
Lawrence Berkeley National Laboratory
Ministério da Ciência, Tecnologia e Inovação
Office of Science
Ohio State University
SLAC National Accelerator Laboratory
Stanford University
University College London
University of Cambridge
University of Chicago
University of Edinburgh
University of Illinois at Urbana-Champaign
University of Michigan
University of Nottingham
University of Pennsylvania
University of Portsmouth
University of Sussex
National Science Foundation
In this paper, we present and validate the galaxy sample used for the analysis of the baryon acoustic oscillation (BAO) signal in the Dark Energy Survey (DES) Y3 data. The definition is based on a colour and redshift-dependent magnitude cut optimized to select galaxies at redshifts higher than 0.5, while ensuring a high-quality determination. The sample covers ~4100 deg2 to a depth of i = 22.3 (AB) at 10s. It contains 7031 993 galaxies in the redshift range from z = 0.6 to 1.1, with a mean effective redshift of 0.835. Redshifts are estimated with the machine learning algorithm DNF, and are validated using the VIPERS PDR2 sample. We find a mean redshift bias of zbias~0.01 and a mean uncertainty, in units of 1 + z, of σ68~0.03. We evaluate the galaxy population of the sample, showing it is mostly built upon Elliptical to Sbc types. Furthermore, we find a low level of stellar contamination of ≤ 4 per cent. We present the method used to mitigate the effect of spurious clustering coming from observing conditions and other large-scale systematics.We apply it to the BAO sample and calculate weights that are used to get a robust estimate of the galaxy clustering signal. This paper is one of a series dedicated to the analysis of the BAO signal in DES Y3. In the companion papers, we present the galaxy mock catalogues used to calibrate the analysis and the angular diameter distance constraints obtained through the fitting to the BAO scale.
Instituto de Astrofísica de Canarias, Tenerife
Universidad de la Laguna Dpto. Astrofísica, Tenerife
Laboratório Interinstitucional de E-Astronomia - LIneA, Rua Gal. José Cristino 77, RJ
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT)
Institut d'Estudis Espacials de Catalunya (IEEC)
Institute of Space Sciences (ICE CSIC) Campus UAB, Carrer de Can Magrans, s/n
Center for Cosmology and Astro-Particle Physics The Ohio State University
Department of Physics The Ohio State University
Institute of Theoretical Astrophysics University of Oslo, PO Box 1029 Blindern
Physics Department 2320 Chamberlin Hall University of Wisconsin-Madison, 1150 University Avenue
Department of Physics University of Michigan
Instituto de Física Teórica Universidade Estadual Paulista, Al. Santos 647
Instituto de Física Teórica UAM/CSIC Universidad Autónoma de Madrid
Departamento de Física Teórica Facultad de Ciencias Universidad Autónoma de Madrid, Cantoblanco
Instituto de Física Gleb Wataghin Universidade Estadual de Campinas, SP
Jet Propulsion Laboratory California Institute of Technology, 4800 Oak Grove Dr.
Kavli Institute for Particle Astrophysics and Cosmology Stanford University, PO Box 2450
ICTP South American Institute for Fundamental Research Instituto de Física Teórica Universidade Estadual Paulista, Al. Santos 647
Department of Astronomy University of Geneva, ch. d'Écogia 16
Cerro Tololo Inter-American Observatory NSF's National Optical-Infrared Astronomy Research Laboratory, Casilla 603
Fermi National Accelerator Laboratory, PO Box 500
CNRS UMR 7095 Institut d'Astrophysique de Paris
Sorbonne Universités UPMC Univ Paris 06 UMR 7095 Institut d'Astrophysique de Paris
Department of Physics and Astronomy University College London, Gower Street
Department of Astronomy and Astrophysics University of Chicago
SLAC National Accelerator Laboratory
School of Mathematics and Physics University of Queensland
INAF Astrophysical Observatory of Turin
Center for Astrophysical Surveys National Center for Supercomputing Applications, 1205 West Clark St
Department of Astronomy University of Illinois at Urbana-Champaign, 1002 W. Green Street
Institut de Física d'Altes Energies (IFAE) The Barcelona Institute of Science and Technology Campus UAB, Bellaterra
Jodrell Bank Center for Astrophysics School of Physics and Astronomy University of Manchester, Oxford Road
University of Nottingham School of Physics and Astronomy
Astronomy Unit Department of Physics University of Trieste, via Tiepolo 11
INAF Observatorio Astronomico di Trieste, via G. B. Tiepolo 11
Institute for Fundamental Physics of the Universe, Via Beirut 2
Observatório Nacional, Rua Gal. José Cristino 77, RJ
School of Mathematic and Physics University of Queensland
Department of Physics IIT Hyderabad, Telangana
Kavli Institute for Cosmological Physics University of Chicago
Department of Physics and Astronomy University of Pennsylvania
Santa Cruz Institute for Particle Physics
Department of Astronomy University of Michigan
Institute of Astronomy University of Cambridge, Madingley Road
Kavli Institute for Cosmology University of Cambridge, Madingley Road
Centre for Astrophysics and Supercomputing Swinburne University of Technology
Faculty of Physics Ludwig-Maximilians-Universität, Scheinerstr. 1
Center for Astrophysics | Harvard and Smithsonian, 60 Garden Street
Lawrence Berkeley National Laboratory, 1 Cyclotron Road
Department of Astronomy/Steward Observatory University of Arizona, 933 North Cherry Avenue
Australian Astronomical Optics Macquarie University
Lowell Observatory, 1400 Mars Hill Rd
Sydney Institute for Astronomy School of Physics The University of Sydney
Centre for Gravitational Astrophysics College of Science The Australian National University
The Research School of Astronomy and Astrophysics Australian National University
Departamento de Física Matemática Instituto de Física Universidade de São Paulo, CP 66318, SP
George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy Department of Physics and Astronomy Texas A&M University
Institució Catalana de Recerca i Estudis Avançats
Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse
Université Clermont Auvergne CNRS/IN2P3 LPC
Department of Physics and Astronomy University of Waterloo, 200 University Ave W
Perimeter Institute for Theoretical Physics, 31 Caroline St North
Department of Astrophysical Sciences Princeton University Peyton Hall
Brookhaven National Laboratory, Bldg 510
School of Physics and Astronomy University of Southampton
Computer Science and Mathematics Division Oak Ridge National Laboratory
Institute of Cosmology and Gravitation University of Portsmouth
Department of Physics Stanford University, 382 Via Pueblo Mall
McDonald Observatory The University of Texas at Austin
Instituto de Física Teórica Universidade Estadual Paulista, Al. Santos 647
ICTP South American Institute for Fundamental Research Instituto de Física Teórica Universidade Estadual Paulista, Al. Santos 647
National Science Foundation: AST-1138766
National Science Foundation: AST-1536171
