Optical archival spectra of blazar candidates of uncertain type in the 3rd fermi large area telescope catalog
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Archivos
Fecha
2016-09
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
Springer Netherlands
Nombre de Curso
Licencia CC
Licencia CC
Resumen
Despite the fact that blazars constitute the rarest class among active galactic nuclei (AGNs) they are the largest known population of associated γ
-ray sources. Many of the γ
-ray objects listed in the Fermi-Large Area Telescope Third Source catalog (3FGL) are classified as blazar candidates of uncertain type (BCUs), either because they show multifrequency behavior similar to blazars but lacking optical spectra in the literature, or because the quality of such spectra is too low to confirm their nature. Here we select, out of 585 BCUs in the 3FGL, 42 BCUs which we identify as probable blazars by their WISE infrared colors and which also have optical spectra that are available in the Sloan Digital Sky Survey (SDSS) and/or Six-Degree Field Galaxy Survey Database (6dFGS). We confirm the blazar nature of all of the sources. We furthermore conclude that 28 of them are BL Lacs, 8 are radio-loud quasars with flat radio spectrum and 6 are BL Lac whose emission is dominated by their host galaxy.
Notas
Indexación: Scopus.
Palabras clave
Galaxies: Active, Galaxies: BL Lacertae Objects, Radiation Mechanisms: Non-Thermal
Citación
Astrophysics and Space Science. Open Access. Volume 361, Issue 9. 1 September 2016. Article number 316
DOI
10.1007/s10509-016-2902-1