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Redshift distributions of galaxies in the Dark Energy Survey Science Verification shear catalogue and implications for weak lensing

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posted on 2024-08-06, 10:27 authored by C. Bonnett, M. A. Troxel, W. Hartley, A. Amara, B. Leistedt, M. R. Becker, G. M. Bernstein, S. L. Bridle, C. Bruderer, M. T. Busha, M. Carrasco Kind, M. J. Childress, F. J. Castander, C. Chang, M. Crocce, T. M. Davis, T. F. Eifler, J. Frieman, C. Gangkofner, E. Gaztanaga, Karl GlazebrookKarl Glazebrook, D. Gruen, T. Kacprzak, A. King, J. Kwan, O. Lahav, G. Lewis, C. Lidman, H. Lin, N. MacCrann, R. Miquel, C. R. O'Neill, A. Palmese, H. V. Peiris, A. Refregier, E. Rozo, E. S. Rykoff, I. Sadeh, C. Sánchez, E. Sheldon, S. Uddin, R. H. Wechsler, J. Zuntz, T. Abbott, F. B. Abdalla, S. Allam, R. Armstrong, M. Banerji, A. H. Bauer, A. Benoit-Lévy, E. Bertin, D. Brooks, E. Buckley-Geer, D. L. Burke, D. Capozzi, A. Carnero Rosell, J. Carretero, C. E. Cunha, C. B. D'Andrea, L. N. Da Costa, D. L. Depoy, S. Desai, H. T. Diehl, J. P. Dietrich, P. Doel, A. Fausti Neto, E. Fernandez, B. Flaugher, P. Fosalba, D. W. Gerdes, R. A. Gruendl, K. Honscheid, B. Jain, D. J. James, M. Jarvis, A. G. Kim, K. Kuehn, N. Kuropatkin, T. S. Li, M. Lima, M. A G Maia, M. March, J. L. Marshall, P. Martini, P. Melchior, C. J. Miller, E. Neilsen, R. C. Nichol, B. Nord, R. Ogando, A. A. Plazas, K. Reil, A. K. Romer, A. Roodman, M. Sako, E. Sanchez, B. Santiago, R. C. Smith, M. Soares-Santos, F. Sobreira, E. Suchyta, M. E C Swanson, G. Tarle, J. Thaler, D. Thomas, V. Vikram, A. R. Walker
We present photometric redshift estimates for galaxies used in the weak lensing analysis of the Dark Energy Survey Science Verification (DES SV) data. Four model- or machine learning-based photometric redshift methods—annz2, bpz calibrated against BCC-Ufig simulations, skynet, and tpz—are analyzed. For training, calibration, and testing of these methods, we construct a catalogue of spectroscopically confirmed galaxies matched against DES SV data. The performance of the methods is evaluated against the matched spectroscopic catalogue, focusing on metrics relevant for weak lensing analyses, with additional validation against COSMOS photo-z’s. From the galaxies in the DES SV shear catalogue, which have mean redshift 0.72±0.01 over the range 0.3

Funding

Research England

Deutsche Forschungsgemeinschaft

Science and Technology Facilities Council

Fermilab

United States Department of Energy

European Research Council

Office of Science

Directorate for Mathematical & Physical Sciences

Australian Research Council

Swiss National Science Foundation

Ministerio de Educación Cultura y Deporte

National Science Foundation

Alfred P. Sloan Foundation

National Council for Scientific and Technological Development

Financiadora de Estudos e Projetos

Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro

Ministry of Economy, Industry and Competitiveness

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Available versions

PDF (Published version)

ISSN

2470-0029

Journal title

Physical Review D

Volume

94

Issue

4

Article number

article no. 042005

Pagination

1 p

Publisher

American Physical Society

Copyright statement

Copyright © 2016 American Physical Society. The published version is reproduced in accordance with the copyright policy of the publisher.

Language

eng

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