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  1. Pubblicazioni

Optical Spectroscopic Observations of Blazars and γ-Ray Blazar Candidates in the Sloan Digital Sky Survey Data Release Nine

Articolo
Data di Pubblicazione:
2014
Abstract:
We present an analysis of the optical spectra available in the Sloan Digital Sky Survey data release nine (SDSS DR9) for the blazars listed in the ROMA-BZCAT and for the γ -ray blazar candidates selected according to their IR colors. First, we adopt a statistical approach based on Monte Carlo simulations to find the optical counterparts of the blazars listed in the ROMA-BZCAT catalog. Then, we crossmatched the SDSS spectroscopic catalog with our selected samples of blazars and γ -ray blazar candidates, searching for those with optical spectra available to classify our blazar-like sources and, whenever possible, to confirm their redshifts. Our main objectives are to determine the classification of uncertain blazars listed in the ROMA-BZCAT and to discover new gamma-ray blazars. For the ROMA-BZCAT sources, we investigated a sample of 84 blazars, confirming the classification for 20 of them and obtaining 18 new redshift estimates. For the γ -ray blazars, indicated as potential counterparts of unassociated Fermi sources or with uncertain nature, we established the blazar-like nature of 8 out of the 27 sources analyzed and confirmed 14 classifications.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
galaxies: active , quasars: general , methods: statistical , radiation mechanisms: non-thermal , surveys
Elenco autori:
F. Massaro;N. Masetti;R. D'Abrusco;A. Paggi;S. Funk
Autori di Ateneo:
MASSARO Francesco
Link alla scheda completa:
https://iris.unito.it/handle/2318/154210
Pubblicato in:
THE ASTRONOMICAL JOURNAL
Journal
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URL

https://arxiv.org/pdf/1503.03868.pdf
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