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dc.contributor.author
de Menezes, Raniere
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dc.contributor.author
Peña Herazo, Harold A.
dc.contributor.author
Marchesini, Ezequiel Joaquín
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dc.contributor.author
D´Abrusco, Raffaele
dc.contributor.author
Masetti, Nicola
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dc.contributor.author
Nemmen, Rodrigo
dc.contributor.author
Massaro, Francesco
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Ricci, Federica
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Landoni, Marco
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Paggi, Alessandro
dc.contributor.author
Smith, Howard A.
dc.date.available
2021-02-10T20:14:28Z
dc.date.issued
2019-09-23
dc.identifier.citation
de Menezes, Raniere; Peña Herazo, Harold A.; Marchesini, Ezequiel Joaquín; D´Abrusco, Raffaele; Masetti, Nicola; et al.; Optical characterization of WISE selected blazar candidates; EDP Sciences; Astronomy and Astrophysics; 630; A55; 23-9-2019; 1-11
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/125358
dc.description.abstract
Context. Over the last decade more than five thousand γ-ray sources have been detected by the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope. Given the positional uncertainty of the telescope, nearly 30% of these sources remain without an obvious counterpart at lower energies. This has motivated the release of new catalogs of γ-ray counterpart candidates and several follow up campaigns in the last decade. Aims. Recently, two new catalogs of blazar candidates were released. These are the improved and expanded version of the WISE Blazar-Like Radio-Loud Sources (WIBRaLS2) catalog and the Kernel Density Estimation selected candidate BL Lacs (KDEBLLACS) catalog, both selecting blazar-like sources based on their infrared colors from the Wide-field Infrared Survey Explorer (WISE). In this work we characterize these two catalogs, clarifying the true nature of their sources based on their optical spectra from SDSS data release 15, thus testing their efficiency in selecting true blazars. Methods. We first selected all WIBRaLS2 and KDEBLLACS sources with available optical spectra in the footprint of Sloan Digital Sky Survey data release 15. We then analyzed these spectra to verify the nature of each selected candidate and to measure the fraction of the catalogs composed by spectroscopically confirmed blazars. Finally, we evaluated the impact of selection effects, especially those related to optical colors of WIBRaLS2/KDEBLLACS sources and their optical magnitude distributions. Results. We found that at least ∼30% of each catalog is made up of confirmed blazars, with quasars being the major contaminants in the case of WIBRaLS2 (≈58%) and normal galaxies in the case of KDEBLLACS (≈38.2%). The spectral analysis also allowed us to identify the nature of 11 blazar candidates of uncertain type (BCUs) from the Fermi-LAT fourth Point Source Catalog (4FGL) and to find 25 new BL Lac objects.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ACTIVE
dc.subject
BL LACERTAE OBJECTS
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CATALOGS
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GALAXIES
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GENERAL
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NON-THERMAL
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RADIATION MECHANISMS
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Astronomía
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Optical characterization of WISE selected blazar candidates
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-11-19T21:57:44Z
dc.journal.volume
630
dc.journal.number
A55
dc.journal.pagination
1-11
dc.journal.pais
Francia
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dc.journal.ciudad
Paris
dc.description.fil
Fil: de Menezes, Raniere. Universidade Do Sao Paulo. Instituto Astronomia, Geofísica E Ciencias Atmosfericas. Departamento de Astronomia; Brasil. Università degli Studi di Torino; Italia
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Fil: Peña Herazo, Harold A.. Instituto Nacional de Astrofísica; México. Università di Torino; Italia. Istituto Nazionale Di Fisica Nucleare.; Italia. Osservatorio Astrofisico di Torino; Italia
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Fil: Marchesini, Ezequiel Joaquín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Istituto Nazionale Di Fisica Nucleare.; Italia. Università di Torino; Italia
dc.description.fil
Fil: D´Abrusco, Raffaele. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
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Fil: Masetti, Nicola. Osservatorio di Astrofisica e Scienza dello Spazio; Italia. Universidad Andrés Bello; Chile
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Fil: Nemmen, Rodrigo. Universidade Do Sao Paulo. Instituto Astronomia, Geofísica E Ciencias Atmosfericas. Departamento de Astronomia; Brasil
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Fil: Massaro, Francesco. Università di Torino; Italia. Istituto Nazionale Di Fisica Nucleare.; Italia. Osservatorio Astrofisico di Torino; Italia. Consorzio Interuniversitario per la Fisica Spaziale ; Italia
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Fil: Ricci, Federica. Pontificia Universidad Católica de Chile; Chile
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Fil: Landoni, Marco. Osservatorio Astronomico di Brera; Italia
dc.description.fil
Fil: Paggi, Alessandro. Università di Torino; Italia
dc.description.fil
Fil: Smith, Howard A.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.journal.title
Astronomy and Astrophysics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/10.1051/0004-6361/201936195
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/201936195
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1908.05229
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