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Optical spectroscopic survey of a sample of Unidentified Fermi objects: II
- Publication Year :
- 2018
-
Abstract
- We report on optical spectroscopy obtained at the 10.4m Gran Telescopio Canarias of 28 Fermi gamma-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 are aimed to characterize the nature and measure the redshift of these sources. For all optical counterparts, the observations allow us to establish their AGN nature. In particular, we found 24 BL Lac objects, one QSO, one NLSy1 and two objects showing spectral features typical of Seyfert 2 galaxies. For most of them, 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.<br />26 pages, 3 figures, 4 tables; accepted for publication in ApJ
- Subjects :
- Physics
High Energy Astrophysical Phenomena (astro-ph.HE)
BL Lacertae objects: General
galaxies: Distances and redshifts
gamma rays: Galaxies
techniques: Spectroscopic
Astronomy and Astrophysics
Space and Planetary Science
Astrophysics::High Energy Astrophysical Phenomena
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Sample (graphics)
Astrophysics - Astrophysics of Galaxies
Astrophysics of Galaxies (astro-ph.GA)
Astrophysics - High Energy Astrophysical Phenomena
Astrophysics::Galaxy Astrophysics
Fermi Gamma-ray Space Telescope
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....a5f03350f0fea293e539cd2e4b555b43