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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
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Nakazono, L. [1] ; de Oliveira, C. Mendes [1] ; Hirata, N. S. T. [2] ; Jeram, S. [3] ; Queiroz, C. [4] ; Eikenberry, Stephen S. [3] ; Gonzalez, A. H. [3] ; Abramo, R. [4] ; Overzier, R. [5] ; Espadoto, M. [2] ; Martinazzo, A. [2] ; Sampedro, L. [1] ; Herpich, F. R. [1] ; Almeida-Fernandes, F. [1] ; Werle, A. [6, 1] ; Barbosa, C. E. [1] ; Sodre Jr, L. ; Lima, V, E. ; Buzzo, M. L. [7] ; Cortesi, A. [8] ; Menendez-Delmestre, K. [8] ; Akras, S. [9] ; Alvarez-Candal, Alvaro [5, 10, 11] ; Lopes, A. R. [5] ; Telles, E. [5] ; Schoenell, W. [12] ; Kanaan, A. [13] ; Ribeiro, T. [14]
Total Authors: 28
Affiliation:
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[1] U Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508900 Sao Paulo, SP - Brazil
[2] Inst Matemat & Estat USP, Dept Ciencia Comp, BR-05508090 Sao Paulo, SP - Brazil
[3] Univ Florida, Dept Astron, 211 Bryant Space Ctr, Gainesville, FL 32611 - USA
[4] Univ Sao Paulo, Inst Fis, Dept Fis Matemat, Rua Matao 1371, Sao Paulo, SP - Brazil
[5] Observatorio Nacl MCTIC, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ - Brazil
[6] INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua - Italy
[7] Lima, E., V, Sodre Jr, Jr., L., U Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508900 Sao Paulo, SP - Brazil
[8] Univ Fed Rio de Janeiro, Observatorio Valongo, Ladeira Pedro Antonio 43, BR-20080090 Rio De Janeiro, RJ - Brazil
[9] Natl Observ Athens, Inst Astron Astrophys Space Applicat & Remote Sen, GR-15236 Penteli - Greece
[10] CSIC, Inst Astrofis Andalucia, Apt 3004, E-18080 Granada - Spain
[11] Univ Alicante, IUFACyT, E-03080 Alicante - Spain
[12] GMTO Corp, 465 N Halstead St, Suite 250, Pasadena, CA 91107 - USA
[13] Univ Fed Santa Catarina, Dept Fis, BR-88040900 Florianopolis, SC - Brazil
[14] Natl Opt Astron Observ, POB 26732, Tucson, AZ 85726 - USA
Total Affiliations: 14
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 507, n. 4, p. 5847-5868, NOV 2021.
Web of Science Citations: 0
Abstract

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. (AU)

FAPESP's process: 18/09165-6 - Recovering galaxies' formation history from multi-band photometry
Grantee:Maria Luísa Gomes Buzzo
Support type: Scholarships in Brazil - Master
FAPESP's process: 19/06766-1 - Selection of Quasar candidates based on multi-band photometric data
Grantee:Carolina Queiroz de Abreu Silva
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 19/10923-5 - Artificial inteligence tools for large galaxy surveys
Grantee:Laerte Sodré Junior
Support type: Regular Research Grants
FAPESP's process: 15/22308-2 - Intermediate representations in Computational Science for knowledge discovery
Grantee:Roberto Marcondes Cesar Junior
Support type: Research Projects - Thematic Grants
FAPESP's process: 19/26492-3 - Science with the Brazilian robotic telescope
Grantee:Claudia Lucia Mendes de Oliveira
Support type: Research Projects - Thematic Grants
FAPESP's process: 18/20977-2 - Identification of giant stars for mapping our Galaxy in the S-PLUS survey
Grantee:Felipe de Almeida Fernandes
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 14/10566-4 - Separation of stars and quasars in multispectral images
Grantee:Lilianne Mariko Izuti Nakazono
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 19/01312-2 - Stellar populations of galaxies in the Hydra cluster: an IFU-like approach
Grantee:Lilianne Mariko Izuti Nakazono
Support type: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 18/25671-9 - Astronomical image processing and analysis using deep convolutional models
Grantee:Ana Carolina Rodrigues Cavalcante Martinazzo
Support type: Scholarships in Brazil - Master
FAPESP's process: 19/23388-0 - Tracing the evolutionary history of nearby barred galaxies with timer and S-PLUS
Grantee:Maria Luísa Gomes Buzzo
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 17/25835-9 - Understanding images and deep learning models
Grantee:Nina Sumiko Tomita Hirata
Support type: Research Grants - Research Partnership for Technological Innovation - PITE
FAPESP's process: 15/11442-0 - Combining quasars and galaxies to trace large-scale structure
Grantee:Carolina Queiroz de Abreu Silva
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 16/12331-0 - Galaxy evolution in different environments using spatially resolved kinematics and stellar populations
Grantee:Carlos Eduardo Barbosa
Support type: Scholarships in Brazil - Post-Doctorate