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Using X-ray catalogues to find counterparts to unassociated high-energy Fermi/LAT sources
R. Landi, L. Bassani, J. B. Stephen +3
The first Fermi Large Area Telescope (LAT) catalogue of sources (1FHL) emitting at high energies (above 10 GeV) reports the details of 514 objects detected in the first three years…
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…
Probing stellar winds and accretion physics in high-mass X-ray binaries and ultra-luminous X-ray sources with LOFT
M. Orlandini, V. Doroshenko, L. Zampieri +28
This is a White Paper in support of the mission concept of the Large Observatory for X-ray Timing (LOFT), proposed as a medium-sized ESA mission. We discuss the potential of LOFT f…