4.7 Article

On the discovery of stars, quasars, and galaxies in the Southern Hemisphere with S-PLUS DR2

Journal

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 507, Issue 4, Pages 5847-5868

Publisher

OXFORD UNIV PRESS
DOI: 10.1093/mnras/stab1835

Keywords

methods: data analysis; catalogues; surveys; stars: general; galaxies: general; quasars: general

Funding

  1. Fundacao de Amparo `a Pesquisa do Estado de S~ao Paulo (FAPESP) [2019/01312-2]
  2. Coordenacao de Aperfeicoamento de Pessoal de N'ivel Superior -Brasil (CAPES) [001]
  3. FAPESP [2014/10566-4, 2009/542028, 2019/26492-3, 2017/25835-9, 2015/22308-2, 2015/11442-0, 2019/06766-1, 2018/25671-9, 2016/12331-0, 2018/20977-2, 2019/10923-5, 2018/09165-6, 2019/23388-0]
  4. Brazilian National Research Council (CNPq) [309209/2019-6]
  5. CNPq [304819/201794, 304971/2016-2, 401669/2016-5, 169181/2017-0, 312702/2017-5]
  6. Fundacao de Amparo `a Pesquisa do Estado do Rio de Janeiro (FAPERJ) [E26/203.186/2016]
  7. CAPES [88887.470064/2019-00]
  8. FAPERJ [E26/203.186/2016, E-26/203.184/2017]
  9. Serrapilheira Institute [Serra-1709-17357]
  10. Universidad de Alicante [UATALENTO18-02]
  11. State Agency for Research of the Spanish MCIU through the `Center of Excellence Severo Ochoa' award [SEV-2017-0709]
  12. CNPq
  13. Brazil, Chile (Universidad de La Serena)
  14. Spain (Centro de Estudios de F'isica del Cosmos de Arag'on, CEFCA)
  15. FAPESP
  16. CAPES
  17. FAPERJ
  18. Brazilian Innovation Agency (FINEP)
  19. Alfred P. Sloan Foundation
  20. U.S. Department of Energy Office of Science
  21. Center for High-Performance Computing at the University of Utah
  22. Brazilian Participation Group
  23. Carnegie Institution for Science, Carnegie Mellon University
  24. Chilean Participation Group
  25. French Participation Group
  26. Harvard-Smithsonian Center for Astrophysics
  27. Instituto de Astrof'isica de Canarias
  28. The Johns Hopkins University
  29. Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo
  30. Lawrence Berkeley National Laboratory
  31. Leibniz Institut fur Astrophysik Potsdam (AIP)
  32. Max-Planck-Institut fur Astronomie (MPIA Heidelberg)
  33. Max-Planck-Institut fur Astrophysik (MPA Garching)
  34. Max-Planck-Institut fur Extraterrestrische Physik (MPE)
  35. National Astronomical Observatories of China
  36. New Mexico State University
  37. New York University
  38. University of Notre Dame
  39. Observat'ario Nacional/MCTI
  40. The Ohio State University
  41. Pennsylvania State University
  42. Shanghai Astronomical Observatory
  43. United Kingdom Participation Group,
  44. Universidad Nacional Aut 'onoma deM 'exico
  45. University of Arizona
  46. University of Colorado Boulder
  47. University of Oxford
  48. University of Portsmouth,
  49. University of Utah
  50. University ofVirginia
  51. University ofWashington
  52. University of Wisconsin
  53. Vanderbilt University
  54. Yale University
  55. National Aeronautics and Space Administration
  56. Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [18/09165-6, 18/25671-9] Funding Source: FAPESP

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This study presents a catalogue of stars, quasars, and galaxies in the Stripe 82 region using S-PLUS DR2 data, showing the advantages of a 12-band filter system for object classification. By training random forest classifiers with spectroscopically confirmed sources from SDSS DR16 and DR14Q, the study achieves high performance in classification.
This paper provides a catalogue of stars, quasars, and galaxies for the Southern Photometric Local Universe Survey Data Release 2 (S-PLUS DR2) in the Stripe 82 region. We show that a 12-band filter system (5 Sloan-like and 7 narrow bands) allows better performance for object classification than the usual analysis based solely on broad bands (regardless of infrared information). Moreover, we show that our classification is robust against missing values. Using spectroscopically confirmed sources retrieved from the Sloan Digital Sky Survey DR16 and DR14Q, we train a random forest classifier with the 12 S-PLUS magnitudes + 4 morphological features. A second random forest classifier is trained with the addition of the W1 (3.4) and W2 (4.6) magnitudes from the Wide-field Infrared Survey Explorer (WISE). Forty-four percent of our catalogue have WISE counterparts and are provided with classification from both models. We achieve 95.76 percent (52.47 percent) of quasar purity, 95.88 percent (92.24 percent) of quasar completeness, 99.44 percent (98.17 percent) of star purity, 98.22 percent (78.56 percent) of star completeness, 98.04 percent (81.39 percent) of galaxy purity, and 98.8 percent (85.37 percent) of galaxy completeness for the first (second) classifier, for which the metrics were calculated on objects with (without) WISE counterpart. A total of 2926 787 objects that are not in our spectroscopic sample were labelled, obtaining 335 956 quasars, 1347 340 stars, and 1243 391 galaxies. From those, 7.4 percent, 76.0 percent, and 58.4 percent were classified with probabilities above 80 percent. The catalogue with classification and probabilities for Stripe 82 S-PLUS DR2 is available for download.

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