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The PAU Survey and Euclid: Improving broadband photometric redshifts with multi-task learning

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

DOI

  • L. Cabayol, Institute for High Energy Physics, Port d'Informació Científica (PIC)
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  • M. Eriksen, Institute for High Energy Physics, Port d'Informació Científica (PIC)
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  • J. Carretero, Institute for High Energy Physics, Port d'Informació Científica (PIC)
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  • R. Casas, The Spanish National Research Council (CSIC), Institute of Space Studies of Catalonia
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  • F. J. Castander, The Spanish National Research Council (CSIC), Institute of Space Studies of Catalonia
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  • E. Fernández, Institute for High Energy Physics
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  • J. Garcia-Bellido, Universidad Autónoma de Madrid
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  • E. Gaztanaga, The Spanish National Research Council (CSIC), Institute of Space Studies of Catalonia
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  • H. Hildebrandt, Ruhr University Bochum
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  • H. Hoekstra, Leiden University
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  • B. Joachimi, University College London
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  • R. Miquel, Institute for High Energy Physics, ICREA
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  • C. Padilla, Institute for High Energy Physics
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  • A. Pocino, The Spanish National Research Council (CSIC), Institute of Space Studies of Catalonia
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  • E. Sanchez, CIEMAT
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  • S. Serrano, The Spanish National Research Council (CSIC)
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  • I. Sevilla, CIEMAT
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  • M. Siudek, Institute for High Energy Physics, The Spanish National Research Council (CSIC)
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  • P. Tallada-Crespí, Port d'Informació Científica (PIC), CIEMAT
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  • N. Aghanim, Université Paris-Saclay (Paris XI)
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  • A. Amara, University of Portsmouth
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  • N. Auricchio, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
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  • M. Baldi, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna, University of Bologna, National Institute for Nuclear Physics
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  • R. Bender, Max Planck Institute for Extraterrestrial Physics, Ludwig-Maximilians-Universität
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  • D. Bonino, National Institute for Astrophysics
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  • E. Branchini, University of Genoa, National Institute for Nuclear Physics
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  • M. Brescia, National Institute for Astrophysics
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  • J. Brinchmann, University of Porto
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  • S. Camera, National Institute for Astrophysics, University of Turin, National Institute for Nuclear Physics
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  • V. Capobianco, National Institute for Astrophysics
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  • C. Carbone, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
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  • M. Castellano, National Institute for Astrophysics
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  • S. Cavuoti, National Institute for Astrophysics, National Institute for Nuclear Physics, University of Naples Federico II
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  • A. Cimatti, University of Bologna, National Institute for Astrophysics
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  • R. Cledassou, CNES Centre National d'Etudes Spatiales, Institut National de Physique Nucleaire et de Physique des Particules
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  • G. Congedo, University of Edinburgh
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  • C. J. Conselice, Manchester University
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  • L. Conversi, European Space Astronomy Centre, ESRIN - ESA Centre for Earth Observation
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  • Y. Copin, Universite Claude Bernard Lyon 1
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  • L. Corcione, National Institute for Astrophysics
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  • F. Courbin, Swiss Federal Institute of Technology Lausanne
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  • M. Cropper, University College London
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  • A. Da Silva, University of Lisbon
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  • H. Degaudenzi, University of Geneva
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  • M. Douspis, Université Paris-Saclay (Paris XI)
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  • F. Dubath, University of Geneva
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  • C. A.J. Duncan, Manchester University, University of Oxford
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  • X. Dupac, European Space Astronomy Centre
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  • S. Dusini, National Institute for Nuclear Physics
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  • S. Farrens, Université Paris-Saclay (Paris XI)
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  • P. Fosalba, The Spanish National Research Council (CSIC), Institute of Space Studies of Catalonia
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  • M. Frailis, National Institute for Astrophysics
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  • E. Franceschi, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
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  • P. Franzetti, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
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  • B. Garilli, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
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  • W. Gillard, Aix-Marseille Université
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  • B. Gillis, University of Edinburgh
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  • C. Giocoli, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna, National Institute for Nuclear Physics
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  • A. Grazian, Astronomical Observatory of Padua
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  • F. Grupp, Max Planck Institute for Extraterrestrial Physics, Ludwig-Maximilians-Universität
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  • S. V.H. Haugan, University of Oslo
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  • W. Holmes, California Institute of Technology
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  • F. Hormuth, von Hoerner & Sulger GmbH
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  • A. Hornstrup, Danmarks Tekniske Universitet
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  • P. Hudelot, Sorbonne Université (Paris IV, Paris VI)
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  • K. Jahnke, Max Planck Institute for Astronomy
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  • M. Kümmel, Ludwig-Maximilians-Universität
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  • S. Kermiche, Aix-Marseille Université
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  • A. Kiessling, California Institute of Technology
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  • M. Kilbinger, Université Paris-Saclay (Paris XI)
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  • R. Kohley, European Space Astronomy Centre
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  • H. Kurki-Suonio, University of Helsinki
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  • S. Ligori, National Institute for Astrophysics
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  • P. B. Lilje, University of Oslo
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  • I. Lloro, ASTRON
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  • E. Maiorano, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
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  • O. Mansutti, National Institute for Astrophysics
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  • O. Marggraf, University of Bonn
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  • K. Markovic, California Institute of Technology
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  • F. Marulli, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna, National Institute for Nuclear Physics, University of Bologna
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  • R. Massey, University of Durham
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  • S. Mei, Université Paris Dauphine - PSL (Paris IX)
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  • M. Meneghetti, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna, National Institute for Nuclear Physics
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  • E. Merlin, National Institute for Astrophysics
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  • G. Meylan, Swiss Federal Institute of Technology Lausanne
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  • M. Moresco, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna, University of Bologna
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  • L. Moscardini, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna, National Institute for Nuclear Physics, University of Bologna
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  • E. Munari, National Institute for Astrophysics
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  • R. Nakajima, University of Bonn
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  • S. M. Niemi, ESTEC
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  • S. Paltani, University of Geneva
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  • F. Pasian, National Institute for Astrophysics
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  • K. Pedersen
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  • V. Pettorino, Université Paris-Saclay (Paris XI)
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  • G. Polenta, Italian Space Agency
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  • M. Poncet, CNES Centre National d'Etudes Spatiales
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  • L. Popa, Institute of Space Science
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  • L. Pozzetti, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
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  • F. Raison, Max Planck Institute for Extraterrestrial Physics
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  • R. Rebolo, Instituto Astrofisico de Canarias, University of La Laguna
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  • J. Rhodes, California Institute of Technology
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  • G. Riccio, National Institute for Astrophysics
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  • C. Rosset, Université Paris Dauphine - PSL (Paris IX)
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  • E. Rossetti, University of Bologna
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  • R. Saglia, Max Planck Institute for Extraterrestrial Physics, Ludwig-Maximilians-Universität
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  • B. Sartoris, Ludwig-Maximilians-Universität, National Institute for Astrophysics
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  • P. Schneider, University of Bonn
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  • A. Secroun, Aix-Marseille Université
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  • G. Seidel, Max Planck Institute for Astronomy
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  • C. Sirignano, National Institute for Nuclear Physics, University of Padova
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  • G. Sirri, National Institute for Nuclear Physics
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  • L. Stanco, National Institute for Nuclear Physics
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  • A. N. Taylor, University of Edinburgh
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  • I. Tereno, University of Lisbon
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  • R. Toledo-Moreo, Politechnic University of Cartagena
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  • F. Torradeflot, Port d'Informació Científica (PIC), CIEMAT
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  • I. Tutusaus, University of Geneva
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  • E. Valentijn, University of Groningen
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  • L. Valenziano, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna, National Institute for Nuclear Physics
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  • Y. Wang, California Institute of Technology
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  • J. Weller, Max Planck Institute for Extraterrestrial Physics, Ludwig-Maximilians-Universität
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  • G. Zamorani, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
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  • J. Zoubian, Aix-Marseille Université
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  • S. Andreon, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
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  • V. Scottez, Sorbonne Université (Paris IV, Paris VI), Junia
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  • A. Tramacere, University of Geneva

Current and future imaging surveys require photometric redshifts (photo-zs) to be estimated for millions of galaxies. Improving the photo-z quality is a major challenge but is needed to advance our understanding of cosmology. In this paper we explore how the synergies between narrow-band photometric data and large imaging surveys can be exploited to improve broadband photometric redshifts. We used a multi-task learning (MTL) network to improve broadband photo-z estimates by simultaneously predicting the broadband photo-z and the narrow-band photometry from the broadband photometry. The narrow-band photometry is only required in the training field, which also enables better photo-z predictions for the galaxies without narrow-band photometry in the wide field. This technique was tested with data from the Physics of the Accelerating Universe Survey (PAUS) in the COSMOS field. We find that the method predicts photo-zs that are 13% more precise down to magnitude iAB < 23; the outlier rate is also 40% lower when compared to the baseline network. Furthermore, MTL reduces the photo-z bias for high-redshift galaxies, improving the redshift distributions for tomographic bins with z > 1. Applying this technique to deeper samples is crucial for future surveys such as Euclid or LSST. For simulated data, training on a sample with iAB < 23, the method reduces the photo-z scatter by 16% for all galaxies with iAB < 25. We also studied the effects of extending the training sample with photometric galaxies using PAUS high-precision photo-zs, which reduces the photo-z scatter by 20% in the COSMOS field.

OriginalsprogEngelsk
ArtikelnummerA153
TidsskriftAstronomy and Astrophysics
Vol/bind671
Antal sider23
ISSN0004-6361
DOI
StatusUdgivet - mar. 2023

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