Optical spectroscopic observations of gamma-ray blazar candidates VIII: the 2016–2017 follow up campaign carried out at SPM, NOT, KPNO and SOAR telescopes

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dc.contributor.authorMarchesini, E.J.
dc.contributor.authorPeña-Herazo, H.A.
dc.contributor.authorÁlvarez Crespo, N.
dc.contributor.authorRicci, F.
dc.contributor.authorNegro, M.
dc.contributor.authorMilisavljevic, D.
dc.contributor.authorMassaro, F.
dc.contributor.authorMasetti, N.
dc.contributor.authorLandoni, M.
dc.contributor.authorChavushyan, V.
dc.contributor.authorD’Abrusco, R.
dc.contributor.authorJiménez-Bailón, E.
dc.contributor.authorLa Franca, F.
dc.contributor.authorPaggi, A.
dc.contributor.authorSmith, H.A.
dc.contributor.authorTosti, G.
dc.date.accessioned2023-06-19T13:40:31Z
dc.date.available2023-06-19T13:40:31Z
dc.date.issued2019-01-01
dc.descriptionIndexación Scopuses
dc.description.abstractThe third Fermi source catalog lists 3033 γ-ray sources above 4 σ significance. More than 30% are classified as either unidentified/unassociated Gamma-ray sources (UGSs), with about 20% classified as Blazar candidates of uncertain types (BCUs). To confirm the blazar-like nature of candidate counterparts of UGSs and BCUs, we started in 2012 an optical spectroscopic follow up campaign. We report here the spectra of 36 targets with observations from the Observatorio Astronómico Nacional San Pedro Mártir, the Southern Astrophysical Research Observatory, the Kitt Peak National Observatory and the Northern Optical Telescope, between 2016 and 2017. We confirm the BL Lac nature of 23 sources, and the flat spectrum radio quasar nature of other 7 ones. We also provide redshift estimates for 19 out of these 30 confirmations, with only one being a lower limit due to spectral features ascribable to intervening systems along the line of sight. As in previous analyses, the largest fraction of now-classified BCUs belong to the class of BL Lac objects, that appear to be the most elusive class of active galactic nuclei. One of the BL Lacs identified in this work, associated with 3FGL J2213.6-4755, lies at a redshift of z> 1.529 , making it one of the few distant gamma-ray BL Lac objects.es
dc.identifier.citationAstrophysics and Space Science Volume 364, Issue 1 1 January 2019 Article number 5es
dc.identifier.issn0004-640X
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/50801
dc.language.isoenes
dc.publisherAstrophysics and Space Sciencees
dc.subjectGalaxies: activees
dc.subjectGalaxies: BL Lacertae objectses
dc.subjectQuasars: generales
dc.titleOptical spectroscopic observations of gamma-ray blazar candidates VIII: the 2016–2017 follow up campaign carried out at SPM, NOT, KPNO and SOAR telescopeses
dc.typeArtículoes
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