Dark Energy Survey Year 3 Results: clustering redshifts – calibration of the weak lensing source redshift distributions with redMaGiC and BOSS/eBOSS
Abstract
We present the calibration of the Dark Energy Survey Year 3 (DES Y3) weak lensing (WL) source galaxy redshift distributions n(z) from clustering measurements. In particular, we cross-correlate the WL source galaxies sample with redMaGiC galaxies (luminous red galaxies with secure photometric redshifts) and a spectroscopic sample from BOSS/eBOSS to estimate the redshift distribution of the DES sources sample. Two distinct methods for using the clustering statistics are described. The first uses the clustering information independently to estimate the mean redshift of the source galaxies within a redshift window, as done in the DES Y1 analysis. The second method establishes a likelihood of the clustering data as a function of n(z), which can be incorporated into schemes for generating samples of n(z) subject to combined clustering and photometric constraints. Both methods incorporate marginalization over various astrophysical systematics, including magnification and redshift-dependent galaxy-matter bias. We characterize the uncertainties of the methods in simulations; the first method recovers the mean z of tomographic bins to RMS (precision) of ∼0.014. Use of the second method is shown to vastly improve the accuracy of the shape of n(z) derived from photometric data. The two methods are then applied to the DES Y3 data.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 18, 2021
- Source ID
- 10.1093/mnras/stab3311
Entities
People
- (des Collaboration)
- A A Plazas
- A Alarcon
- A Carnero Rosell
- A Choi
- A E Evrard
- A Palmese
- A Roodman
- A. Amon
- Ashley J. Ross
- B Flaugher
- B Hoyle
- C Conselice
- C To
- C. Sánchez
- D Huterer
- D L Hollowood
- D. Bacon
- D. J. James
- D. L. Burke
- Daniel Gruen
- Daniel I. Brooks
- Daniel Thomas
- E Bertin
- E Rozo
- E S Rykoff
- E. R. Sánchez
- Enrique Gaztañaga
- Eric Suchyta
- F J Castander
- F Menanteau
- F Paz-chinchón
- G Tarlé
- G. Giannini
- G. Rossi
- Gary Bernstein
- H T Diehl
- Haibo Lin
- Hector Martin Crocce
- I Sevilla-noarbe
- Ian Harrison
- Ismael Ferrero
- J Annis
- J Derose
- J Elvin-poole
- J Frieman
- J Gschwend
- J J Mohr
- J. Cordero
- J. L. Marshall
- J. Myles
- Jorge Carretero Palacios
- Juan García-Bellido
- Judit Prat
- Juliane Weller
- K Dawson
- K Honscheid
- K Kuehn
- K. Eckert
- L F Secco
- L N Da Costa
- M A G Maia
- M Carrasco Kind
- M E C Swanson
- M E S Pereira
- M Gatti
- M Soares-santos
- M Troxel
- M. March
- M. Rodríguez-Monroy
- Manuela Lima
- Mathew Smith
- Matteo Costanzi
- Michel Aguena
- Niall MacCrann
- Nikolay Kuropatkin
- O Lahav
- P Fosalba
- Peter Melchior
- R A Gruendl
- R D Wilkinson
- R L C Ogando
- R Miquel
- Robert W. Morgan
- Ross Cawthon
- S Avila
- S R Hinton
- S Samuroff
- S Serrano
- S. Allam
- S. Everett
- Shruti Desai
- T F Eifler
- T Giannantonio
- T M C Abbott
- T N Varga
- V Scarpine
- W J Percival
Organizations
- Argonne National Laboratory
- Autonomous University of Madrid
- Barcelona Institute for Science and Technology
- California Institute of Technology
- Carnegie Mellon University
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
- Cerro Tololo Inter-American Observatory
- Duke University
- ETH Zurich
- European Commission
- European Regional Development Fund
- European Research Council
- Fermilab
- Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
- German Research Foundation
- Harvard–Smithsonian Center for Astrophysics
- Higher Education Funding Council for England
- Indian Institute of Technology Hyderabad
- Institute for Fundamental Physics of the Universe
- Institute of Space Studies of Catalonia
- Instituto de Astrofísica de Canarias
- Lawrence Berkeley National Laboratory
- Lowell Observatory
- Ludwig-Maximilians-Universität München
- Max Planck Institute for Extraterrestrial Physics
- Ministry of Economy, Industry and Competitiveness
- National Autonomous University of Mexico
- National Center for Supercomputing Applications
- National Science Foundation
- Oak Ridge National Laboratory
- Ohio State University
- Perimeter Institute for Theoretical Physics
- Princeton University
- SLAC National Accelerator Laboratory
- Santa Cruz Institute for Particle Physics
- Science and Technology Facilities Council
- Sejong University
- Sorbonne Universités
- Spanish National Research Council
- Stanford University
- Texas A&M University
- United States Department of Energy
- University College London
- University of Arizona
- University of California
- University of Cambridge
- University of Chicago
- University of Colorado Boulder
- University of Edinburgh
- University of Illinois Urbana–Champaign
- University of La Laguna
- University of Manchester
- University of Michigan
- University of Nottingham
- University of Oslo
- University of Pennsylvania
- University of Portsmouth
- University of Queensland
- University of Southampton
- University of Sussex
- University of São Paulo
- University of Tokyo
- University of Utah
- University of Virginia
- University of Washington
- University of Waterloo
- University of Wisconsin–Madison
- Vanderbilt University
- Yale University