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SKA Science Data Challenge 2: analysis and results

Hartley, Philippa (author)
SKA Organisation
Bonaldi, A. (author)
SKA Organisation,University of Manchester
Braun, Robert (author)
SKA Organisation
show more...
Aditya, J. N.H.S. (author)
Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
Aicardi, S. (author)
Observatoire de Paris,Paris Observatory
Alegre, L. (author)
SKA Organisation,University of Edinburgh
Chakraborty, A. (author)
Chen, X. (author)
Chinese Academy of Sciences
Choudhuri, S. (author)
Indian Institute of Technology Madras,Queen Mary University of London
Clarke, A. O. (author)
SKA Organisation
Coles, J. (author)
University Of Cambridge
Collinson, J. S. (author)
SKA Organisation
Cornu, D. (author)
Observatoire de Paris,Paris Observatory
Darriba, L. (author)
Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
Delli Veneri, M. (author)
Universita Degli Studi Di Napoli Federico Ii,University of Naples Federico II
Forbrich, J. (author)
University of Hertfordshire
Fraga, B. (author)
Galan, A. (author)
Ecole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL)
Garrido, J. (author)
Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
Gubanov, F. (author)
M. V. Lomonosov Moscow State University
Håkansson, Henrik (author)
Stiftelsen Fraunhofer-Chalmers Centrum för Industrimatematik (FCC),Fraunhofer-Chalmers Research Centre for Industrial Mathematics (FCC)
Hardcastle, M. J. (author)
University of Hertfordshire
Heneka, C. (author)
Universität Hamburg,University of Hamburg
Herranz, D. (author)
CSIC-UC - Instituto de Física de Cantabria (IFCA)
Hess, K. M. (author)
Rijksuniversiteit Groningen,University of Groningen,Netherlands Institute for Radio Astronomy (ASTRON),Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
Jagannath, M. (author)
Jaiswal, Sumit (author)
Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
Jurek, R. J. (author)
University of Queensland
Korber, D. (author)
Ecole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL)
Kitaeff, S. (author)
University of Western Australia
Kleiner, D. (author)
Istituto nazionale di astrofisica (INAF)
Lao, B. Q. (author)
Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
Lu, X. (author)
Observatoire de Paris,Paris Observatory
Mazumder, A. (author)
Moldon, J. (author)
Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
Mondal, R. (author)
Tel Aviv University
Ni, S. (author)
Önnheim, Magnus, 1985 (author)
Stiftelsen Fraunhofer-Chalmers Centrum för Industrimatematik (FCC),Fraunhofer-Chalmers Research Centre for Industrial Mathematics (FCC)
Parra, M. (author)
Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
Patra, N. (author)
Raman Research Institute
Peel, A. (author)
Ecole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL)
Salomé, P. (author)
Observatoire de Paris,Paris Observatory
Sánchez-Expósito, S. (author)
Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
Sargent, M. (author)
University of Sussex,Ecole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL),International Space Science Institute
Semelin, B. (author)
Observatoire de Paris,Paris Observatory
Serra, P. (author)
Istituto nazionale di astrofisica (INAF)
Shaw, A. K. (author)
Indian Institute of Technology Kharagpur
Shen, A. X. (author)
Commonwealth Scientific and Industrial Research Organisation (CSIRO)
Sjöberg, Anders (author)
Stiftelsen Fraunhofer-Chalmers Centrum för Industrimatematik (FCC),Fraunhofer-Chalmers Research Centre for Industrial Mathematics (FCC)
Smith, L. (author)
University Of Cambridge
Soroka, A. (author)
M. V. Lomonosov Moscow State University
Stolyarov, V. (author)
Russian Academy of Sciences,University Of Cambridge
Tolley, E. (author)
Ecole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL)
Toribio Perez, Maria Carmen, 1981 (author)
Chalmers tekniska högskola,Chalmers University of Technology
van der Hulst, J. M. (author)
Rijksuniversiteit Groningen,University of Groningen
Vafaei Sadr, A. (author)
Université de Genève,University of Geneva
Verdes-Montenegro, L. (author)
Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
Westmeier, T. (author)
University of Western Australia
Yu, K. (author)
Chinese Academy of Sciences
Yu, L. (author)
Chinese Academy of Sciences
Zhang, L. (author)
Peng Cheng Laboratory,Sun Yat-Sen University
Zhang, X. (author)
Zhang, Y. (author)
Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
Alberdi, Antxon (author)
Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
Ashdown, M. (author)
University Of Cambridge
Bom, C. R. (author)
Brüggen, M. (author)
Universität Hamburg,University of Hamburg
Cannon, J. (author)
Macalester College
Chen, R. (author)
Chinese Academy of Sciences
Combes, Françoise (author)
Collège de France,Observatoire de Paris,Paris Observatory
Conway, John, 1963 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Courbin, Frédéric (author)
Ecole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL)
Ding, J. (author)
Sun Yat-Sen University
Fourestey, G. (author)
Ecole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL)
Freundlich, J. (author)
Gao, L. (author)
Gheller, C. (author)
Istituto nazionale di astrofisica (INAF)
Guo, Q. (author)
Chinese Academy of Sciences
Gustavsson, Emil, 1987 (author)
Stiftelsen Fraunhofer-Chalmers Centrum för Industrimatematik (FCC),Fraunhofer-Chalmers Research Centre for Industrial Mathematics (FCC)
Jirstrand, Mats, 1968 (author)
Stiftelsen Fraunhofer-Chalmers Centrum för Industrimatematik (FCC),Fraunhofer-Chalmers Research Centre for Industrial Mathematics (FCC)
Jones, M. G. (author)
University of Arizona
Józsa, G. I.G. (author)
Kamphuis, Peter (author)
Ruhr-Universität Bochum
Kneib, J.P.J.P. (author)
Ecole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL)
Lindqvist, Michael, 1960 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Liu, B. (author)
Chinese Academy of Sciences
Liu, Y. (author)
Chinese Academy of Sciences
Mao, Y. (author)
Tsinghua University
Marchal, Antoine (author)
Institut canadien d'astrophysique théorique,Canadian Institute for Theoretical Astrophysics
Márquez, I. (author)
Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
Meshcheryakov, A. (author)
Russian Academy of Sciences
Olberg, Michael, 1956 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Oozeer, N. (author)
Pandey-Pommier, M. (author)
Laboratoire Univers et Particules de Montpellier
Pei, W. (author)
Chinese Academy of Sciences
Peng, B. (author)
Chinese Academy of Sciences
Sabater, J. (author)
University of Edinburgh
Sorgho, A. (author)
Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
Starck, J. L. (author)
Ecole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL)
Tasse, C. (author)
Centre national de la recherche scientifique (CNRS),Rhodes University
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 (creator_code:org_t)
2023
2023
English.
In: Monthly Notices of the Royal Astronomical Society. - 0035-8711 .- 1365-2966. ; 523:2, s. 1967-1993
  • Journal article (peer-reviewed)
Abstract Subject headings
Close  
  • The Square Kilometre Array Observatory (SKAO) will explore the radio sky to new depths in order to conduct transformational science. SKAO data products made available to astronomers will be correspondingly large and complex, requiring the application of advanced analysis techniques to extract key science findings. To this end, SKAO is conducting a series of Science Data Challenges, each designed to familiarize the scientific community with SKAO data and to drive the development of new analysis techniques. We present the results from Science Data Challenge 2 (SDC2), which invited participants to find and characterize 233 245 neutral hydrogen (H i) sources in a simulated data product representing a 2000 h SKA-Mid spectral line observation from redshifts 0.25-0.5. Through the generous support of eight international supercomputing facilities, participants were able to undertake the Challenge using dedicated computational resources. Alongside the main challenge, 'reproducibility awards' were made in recognition of those pipelines which demonstrated Open Science best practice. The Challenge saw over 100 participants develop a range of new and existing techniques, with results that highlight the strengths of multidisciplinary and collaborative effort. The winning strategy - which combined predictions from two independent machine learning techniques to yield a 20 per cent improvement in overall performance - underscores one of the main Challenge outcomes: that of method complementarity. It is likely that the combination of methods in a so-called ensemble approach will be key to exploiting very large astronomical data sets.

Subject headings

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
NATURVETENSKAP  -- Data- och informationsvetenskap -- Datavetenskap (hsv//swe)
NATURAL SCIENCES  -- Computer and Information Sciences -- Computer Sciences (hsv//eng)

Keyword

galaxies: statistics
techniques: imaging spectroscopy
radio lines: galaxies
methods: data analysis
surveys
software: simulations

Publication and Content Type

art (subject category)
ref (subject category)

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Hartley, Philipp ...
Bonaldi, A.
Braun, Robert
Aditya, J. N.H.S ...
Aicardi, S.
Alegre, L.
show more...
Chakraborty, A.
Chen, X.
Choudhuri, S.
Clarke, A. O.
Coles, J.
Collinson, J. S.
Cornu, D.
Darriba, L.
Delli Veneri, M.
Forbrich, J.
Fraga, B.
Galan, A.
Garrido, J.
Gubanov, F.
Håkansson, Henri ...
Hardcastle, M. J ...
Heneka, C.
Herranz, D.
Hess, K. M.
Jagannath, M.
Jaiswal, Sumit
Jurek, R. J.
Korber, D.
Kitaeff, S.
Kleiner, D.
Lao, B. Q.
Lu, X.
Mazumder, A.
Moldon, J.
Mondal, R.
Ni, S.
Önnheim, Magnus, ...
Parra, M.
Patra, N.
Peel, A.
Salomé, P.
Sánchez-Expósito ...
Sargent, M.
Semelin, B.
Serra, P.
Shaw, A. K.
Shen, A. X.
Sjöberg, Anders
Smith, L.
Soroka, A.
Stolyarov, V.
Tolley, E.
Toribio Perez, M ...
van der Hulst, J ...
Vafaei Sadr, A.
Verdes-Montenegr ...
Westmeier, T.
Yu, K.
Yu, L.
Zhang, L.
Zhang, X.
Zhang, Y.
Alberdi, Antxon
Ashdown, M.
Bom, C. R.
Brüggen, M.
Cannon, J.
Chen, R.
Combes, François ...
Conway, John, 19 ...
Courbin, Frédéri ...
Ding, J.
Fourestey, G.
Freundlich, J.
Gao, L.
Gheller, C.
Guo, Q.
Gustavsson, Emil ...
Jirstrand, Mats, ...
Jones, M. G.
Józsa, G. I.G.
Kamphuis, Peter
Kneib, J.P.J.P.
Lindqvist, Micha ...
Liu, B.
Liu, Y.
Mao, Y.
Marchal, Antoine
Márquez, I.
Meshcheryakov, A ...
Olberg, Michael, ...
Oozeer, N.
Pandey-Pommier, ...
Pei, W.
Peng, B.
Sabater, J.
Sorgho, A.
Starck, J. L.
Tasse, C.
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About the subject
NATURAL SCIENCES
NATURAL SCIENCES
and Physical Science ...
and Astronomy Astrop ...
NATURAL SCIENCES
NATURAL SCIENCES
and Computer and Inf ...
and Computer Science ...
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Monthly Notices ...
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Chalmers University of Technology

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