Optical spectroscopic observations of gamma-ray blazar candidates. X. Results from the 2018-2019 SOAR and OAN-SPM observations of blazar candidates of uncertain type

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dc.contributor.authorde Menezes, R.
dc.contributor.authorAmaya-Almazan, R. A.
dc.contributor.authorMarchesini, E. J.
dc.contributor.authorPena-Herazo, H. A.
dc.contributor.authorMassaro, F.
dc.contributor.authorChavushyan, V
dc.contributor.authorPaggi, A.
dc.contributor.authorLandoni, M.
dc.contributor.authorMasetti, N.
dc.contributor.authorRicci, F.
dc.contributor.authorD'Abrusco, R.
dc.contributor.authorLa Franca, F.
dc.contributor.authorSmith, Howard A.
dc.contributor.authorMilisavljevic, D.
dc.contributor.authorTosti, G.
dc.contributor.authorJimenez-Bailon, E.
dc.contributor.authorCheung, C. C.
dc.date.accessioned2025-01-23T19:56:33Z
dc.date.available2025-01-23T19:56:33Z
dc.date.issued2020
dc.description.abstractThe fourth Fermi Large Area Telescope Source Catalog (4FGL) lists over 5000. -ray sources with statistical significance above 4s. About 23% of the sources listed in this catalog are unidentified/unassociated. -ray sources while 26% of the sources are classified as blazar candidates of uncertain type (BCUs), lacking optical spectroscopic information. To probe the blazar nature of candi- date counterparts of UGSs and BCUs, we started our optical spectroscopic follow up campaign in 2012, which up to date account for more than 350 observed sources. In this paper, the tenth of our campaign, we report on the spectroscopic observations of 37 sources, mostly BCUs, whose observations were carried out predominantly at the Observatorio Astronomico Nacional San Pedro Martir and the Southern Astrophysical Research Observatory between August 2018 and September 2019. We confirm the BL Lac nature of 27 sources and the flat spectrum radio quasar nature of three sources. The remaining ones are classified as six BL Lacs galaxy-dominated and one normal galaxy. We were also able to measure the redshifts for 20 sources, including 10 BL Lacs. As in previous analyses, the largest fraction of BCUs revealed to be BL Lac objects.
dc.fuente.origenWOS
dc.identifier.doi10.1007/s10509-020-3727-5
dc.identifier.eissn1572-946X
dc.identifier.issn0004-640X
dc.identifier.urihttps://doi.org/10.1007/s10509-020-3727-5
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/100712
dc.identifier.wosidWOS:000519588400003
dc.issue.numero1
dc.language.isoen
dc.revistaAstrophysics and space science
dc.rightsacceso restringido
dc.subjectGalaxies: active
dc.subjectGalaxies
dc.subjectBL Lacertae objects
dc.subjectQuasars
dc.subjectgeneral
dc.subjectSurveys
dc.subjectRadiation mechanisms: non-thermal
dc.titleOptical spectroscopic observations of gamma-ray blazar candidates. X. Results from the 2018-2019 SOAR and OAN-SPM observations of blazar candidates of uncertain type
dc.typeartículo
dc.volumen365
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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