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Hidden AGNs in Early-Type Galaxies
A. Paggi, G. Fabbiano, F. Civano +3
We present a stacking analysis of the complete sample of Early Type Galaxies (ETGs) in the \textit{Chandra} COSMOS (C-COSMOS) survey, to explore the nature of the X-ray luminosity…
Optical spectroscopic observations of gamma-ray blazar candidates IV. Results of the 2014 follow-up campaign
F. Ricci, F. Massaro, M. Landoni +7
The extragalactic gamma-ray sky is dominated by the emission arising from blazars, one of the most peculiar classes of radio-loud active galaxies. Since the launch of Fermi several…
Optical spectroscopic observations of gamma-ray blazar candidates III. The 2013/2014 campaign in the Southern Hemisphere
M. Landoni, F. Massaro, A. Paggi +8
We report the results of our exploratory program carried out with the Southern Astrophysical Research (SOAR) telescope aimed at associating counterparts and establishing the nature…
Optical spectroscopic observations of gamma-ray blazar candidates II. The 2013 KPNO campaign in the Northern Hemisphere
F. Massaro, M. Landoni, R. D'Abrusco +5
We recently started a systematic search of low-energy counterparts of the unidentified gamma-ray sources (UGSs) listed in the Fermi-Large Area Telescope (LAT) First Source Catalog…
The low-frequency radio catalog of flat spectrum sources
F. Massaro, M. Giroletti, R. D'Abrusco +5
A well known property of the gamma-ray sources detected by COS-B in the 1970s, by the Compton Gamma-ray Observatory in the 1990s and recently by the Fermi observations is the prese…
Unveiling the nature of the unidentified gamma-ray sources VI: gamma-ray blazar candidates in the WISH survey and their radio properties
M. Nori, M. Giroletti, F. Massaro +4
According to the second Fermi LAT Catalog (2FGL), about one third of the gamma-ray sources listed have no assigned counterparts at lower energies. Many statistical methods have bee…