Optical Spectroscopic Survey of a Sample of Unidentified Fermi Objects: II

Journal
Date Issued
2019
Author(s)
•
•
•
Franceschini, Alberto
•
Scarpa, Riccardo
DOI
Abstract
We report on optical spectroscopy obtained at the 10.4 m Gran Telescopio Canarias of 28 Fermi γ-ray sources that completes the study of a sample of 60 targets of unidentified objects for which the detection of an X-ray and/or radio source inside the 3FGL error box is available. The observations aim to characterize the nature and measure the redshift of these sources. For all optical counterparts, the observations allow us to establish their active galactic nucleus nature. In particular, we found 24 BL Lac objects, one quasar, one narrow line Seyfert 1, and two objects showing spectral features typical of Seyfert 2 galaxies. For most of these, we determine a spectroscopic redshift, while for five we can set lower limits based on the lack of stellar features from the host galaxy. The global properties of the full sample are briefly discussed.
Volume
871
Issue
2
Start page
162
Uri
Url
Issn Identifier
0004-637X
Ads BibCode
2019ApJ...871..162P
Rights
open.access
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