Bibcode
Paiano, Simona; Falomo, Renato; Treves, Aldo; Franceschini, Alberto; Scarpa, R.
Bibliographical reference
The Astrophysical Journal, Volume 871, Issue 2, article id. 162, 10 pp. (2019).
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2
2019
Journal
Citations
28
Refereed citations
26
Description
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.
Related projects
Relativistic and Theoretical Astrophysics
Introduction Gravitational lenses are a powerful tool for Astrophysics and Cosmology. The goals of this project are: i) to obtain a robust determination of the Hubble constant from the time delay measured between the images of a lensed quasar; ii) to study the individual and statistical properties of dark matter condensations in lens galaxies from
Evencio
Mediavilla Gradolph