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Villata, O.J.A. Bravo Calle, O.M. Kurtanidze, O. Spiridonova, R. Casas, S.G. Jorstad, S.J. Fegan, S.O. Kurtanidze, T.H. Burnett, T.S. Konstantinova, V.M. Larionov, V.V. Vlasyuk, W. Max-Moerbeck","submitted_at":"2011-07-14T20:00:03Z","abstract_excerpt":"For more than 15 years, since the days of the Energetic Gamma-Ray Experiment Telescope (EGRET) on board the Compton Gamma-Ray Observatory (CGRO; 1991-2000), it has remained an open question why the prominent blazar 3C 345 was not reliably detected at gamma-ray energies <=20 MeV. Recently a bright gamma-ray source (0FGL J1641.4+3939/1FGL J1642.5+3947), potentially associated with 3C 345, was detected by the Large Area Telescope (LAT) on Fermi. 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