Looking for blazars in a sample of unidentified high-energy emitting Fermi sources

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dc.contributor.authorMarchesini, EJ
dc.contributor.authorMasetti, N
dc.contributor.authorChavushyan, V
dc.contributor.authorCellone, SA
dc.contributor.authorAndruchow, I
dc.contributor.authorBassani, L
dc.contributor.authorBazzano, A
dc.contributor.authorJimenez-Bailon, E
dc.contributor.authorLandi, R
dc.contributor.authorMalizia, A
dc.contributor.authorPalazzi, E
dc.contributor.authorPatino-Alvarez, V
dc.contributor.authorRodriguez-Castillo, GA
dc.contributor.authorStephen, JB
dc.contributor.authorUbertini, P
dc.date.accessioned2017-07-17T21:32:54Z
dc.date.available2017-07-17T21:32:54Z
dc.date.issued2016-11
dc.descriptionIndexación: Web of Sciencees_CL
dc.description.abstractContext. Based on their overwhelming dominance among associated Fermi gamma-ray catalogue sources, it is expected that a large fraction of the unidentified Fermi objects are blazars. Through crossmatching between the positions of unidentified gamma-ray sources from the First Fermi Catalog of gamma-ray sources emitting above 10 GeV (1FHL) and the ROSAT and Swift/XRT catalogues of X-ray objects and between pointed XRT observations, a sample of 36 potential associations was found in previous works with less than 15 arcsec of positional off set. One-third of them have recently been classified; the remainder, though believed to belong to the blazar class, still lack spectroscopic classifications. Aims. We study the optical spectrum of the putative counterparts of these unidentified gamma-ray sources in order to find their redshifts and to determine their nature and main spectral characteristics. Methods. An observational campaign was carried out on the putative counterparts of 13 1FHL sources using medium-resolution optical spectroscopy from the Osservatorio Astronomico di Bologna in Loiano, Italy; the Telescopio Nazionale Galileo and the Nordic Optical Telescope, both in the Canary Islands, Spain; and the Observatorio Astronomico Nacional San Pedro Martir in Baja California, Mexico. Results. We were able to classify 14 new objects based on their continuum shapes and spectral features. Conclusions. Twelve new blazars were found, along with one new quasar and one new narrow line Seyfert 1 (NLS1) to be potentially associated with the 1FHL sources of our sample. Redshifts or lower limits were obtained when possible alongside central black hole mass and luminosity estimates for the NLS1 and the quasar.es_CL
dc.description.urihttps://www.aanda.org/articles/aa/abs/2016/12/aa29028-16/aa29028-16.html
dc.identifier.citationASTRONOMY & ASTROPHYSICS, 596 10.1051/0004-6361/201629028 DEC 2016es_CL
dc.identifier.issn1432-0746
dc.identifier.otherhttps://doi.org/10.1051/0004-6361/201629028
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/3714
dc.language.isoenes_CL
dc.publisherEDP SCIENCESes_CL
dc.subjectGamma rays: generales_CL
dc.subjectX-rays: generales_CL
dc.subjectGalaxies: activees_CL
dc.subjectBL Lacertae objects: generales_CL
dc.titleLooking for blazars in a sample of unidentified high-energy emitting Fermi sourceses_CL
dc.typeArtículoes_CL
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