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dc.contributor.author
Peña Herazo, H. A.
dc.contributor.author
Massaro, F.
dc.contributor.author
Chavushyan, Vahram
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Marchesini, Ezequiel Joaquín
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Paggi, A.
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Landoni, M.
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Masetti, N.
dc.contributor.author
Ricci, F.
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D’Abrusco, R.
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Milisavljevic, D.
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Jiménez Bailón, E.
dc.contributor.author
La Franca, F.
dc.contributor.author
Smith, Howard A.
dc.contributor.author
Tosti, G.
dc.date.available
2021-02-11T02:02:48Z
dc.date.issued
2019-05-10
dc.identifier.citation
Peña Herazo, H. A.; Massaro, F.; Chavushyan, Vahram; Marchesini, Ezequiel Joaquín; Paggi, A.; et al.; Optical spectroscopic observations of gamma-ray blazar candidates. IX. Optical archival spectra and further observations from SOAR and OAGH; Springer; Astrophysics And Space Science; 364; 85; 10-5-2019; 1-25
dc.identifier.issn
0004-640X
dc.identifier.uri
http://hdl.handle.net/11336/125378
dc.description.abstract
Nearly one third of the sources in the Fermi-LAT catalogs lacks a lower energy counterpart, hence being referred as unidentified/unassociated gamma-ray sources (UGSs). In order to firmly classify them, dedicated multifrequency follow-up campaigns are necessary. These will permit to unveil their nature and identify the fraction that could belong to the class of active galaxies known as blazars that is the largest population of extragalactic γ-ray sources. In Fermi-LAT catalogs there are also gamma-ray sources associated with multifrequency blazar-like objects known as Blazars Candidates of Uncertain type (i.e., BCUs) for which follow up spectroscopic campaigns are mandatory to confirm their blazar nature. Thus, in 2013 we started an optical spectroscopic campaign to identify blazar-like objects potential counterparts of UGSs and BCUs. Here we report the spectra of 31 additional targets observed as part of our follow up campaign. Thirteen of them are BCUs for which we acquired spectroscopic observations at Observatorio Astrofísico Guillermo Haro (OAGH) and at Southern Astrophysical Research Observatory (SOAR) telescopes, while the rest has been identified thanks to the archival observations available from the Sloan Digital Sky Survey (SDSS). We confirm the blazar nature of all BCUs: three of them are in blazar of quasar type (BZQs) while the remaining ones can be spectroscopically classified as BL Lac objects (BZBs). Then we also discovered 18 BL Lac objects lying within the positional uncertainty regions of UGSs that could be their potential counterparts.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
GALAXIES: ACTIVE
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GALAXIES: BL LACERTAE OBJECTS
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QUASARS: GENERAL
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RADIATION MECHANISMS: NON-THERMAL
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SURVEYS
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Optical spectroscopic observations of gamma-ray blazar candidates. IX. Optical archival spectra and further observations from SOAR and OAGH
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-11-19T22:00:53Z
dc.journal.volume
364
dc.journal.number
85
dc.journal.pagination
1-25
dc.journal.pais
Alemania
dc.description.fil
Fil: Peña Herazo, H. A.. Instituto Nacional de Astrofísica, Óptica y Electrónica; México. Istituto Nazionale Di Fisica Nucleare; Italia. Università di Torino; Italia
dc.description.fil
Fil: Massaro, F.. Istituto Nazionale Di Fisica Nucleare; Italia. Consorzio Interuniversitario Per la Fisica Spaziale; Italia. Università degli Studi di Torino; Italia
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Fil: Chavushyan, Vahram. Instituto Nacional de Astrofísica, Óptica y Electrónica; México
dc.description.fil
Fil: Marchesini, Ezequiel Joaquín. Istituto Nazionale Di Fisica Nucleare; Italia. Università degli Studi di Torino; Italia. 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
dc.description.fil
Fil: Paggi, A.. Università degli Studi di Torino; Italia. Istituto Nazionale Di Fisica Nucleare; Italia. Istituto Nazionale di Astrofisica; Italia. Consorzio Interuniversitario Per la Fisica Spaziale; Italia
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Fil: Landoni, M.. Osservatorio Astronomico Di Brera; Italia
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Fil: Masetti, N.. Universidad Andrés Bello; Chile. Osservatorio di Astrofisica e Scienza dello Spazio; Italia
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Fil: Ricci, F.. Pontificia Universidad Católica de Chile; Chile
dc.description.fil
Fil: D’Abrusco, R.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Milisavljevic, D.. Purdue University; Estados Unidos. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Jiménez Bailón, E.. Universidad Nacional Autónoma de México; México
dc.description.fil
Fil: La Franca, F.. Università Roma Tre Iii.; Italia
dc.description.fil
Fil: Smith, Howard A.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Tosti, G.. Università di Perugia; Italia
dc.journal.title
Astrophysics And Space Science
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s10509-019-3574-4
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s10509-019-3574-4
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