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Research, 23 Universitat de Barcelona, 24 Universita di Pisa, 25), 25 now at: NASA Goddard Space Flight Center, 26), 26 now at: Ecole polytechnique federale de Lausanne (EPFL), 27), 27 now at: Department of Physics & Astronomy, 28), 29), 29 also at INAF-Trieste, 2 Universita di Udine, 30), 300 Jhongda Rd., 30-244 Krakow, 30 also at Instituto de Fisica Teorica, 31), 3-1-1 Yoshinodai, 31 now at: Stockholm University, 32), 32 now at GRAPPA Institute, 33 Dipartimento di Fisica, 34 ASI Science Data Centre (ASDC), 35 INAF-IASF Palermo, 36 Astrophysics Research Institute, 37 Tuorla Observatory, 38 INAF-Osservatorio Astrofisico di Torino, 39 Aalto University Metsahovi Radio Observatory, 3 INAF National Institute for Astrophysics, 40 Aalto University Department of Radio Science, 40) J. Tammi (39), 41 Cahill Center for Astronomy & Astrophysics, 42 Department of Physics, 43), 43 Institute for Astrophysical Research, 44), 44 INAF-IRA Bologna, 45 Harvard-Smithsonian Center for Astrophysics, 46), 46 Astron. Inst., 47, 47 Pulkovo Observatory, 48), 48 Isaac Newton Institute of Chile, 49 University of Crete, 4 Universita di Siena, 50 Graduate Institute of Astronomy, 51 Joint Institute for VLBI in Europe, 52, 525 Northwestern Ave, 52 Instituto de Astrofisica de Andalucia, 53121 Bonn, 54, 54 Landessternwarte, 55), 55 Engelhardt Astronomical Observatory, 56, 56 Instituto de Astrofisica de Canarias (IAC), 57), 57 Departamento de Astrofisica, 58 Sofia University, 59 Department of Astronomy, 5 Croatian MAGIC Consortium, 60 Max-Planck-Institut fur Radioastronomie, 61 Institut de Radio Astronomie Millimetrique, 63), 63 Astronomical Observatory, 69117 Heidelberg, 6 Max-Planck-Institut fur Physik, 7 Universidad Complutense, 817 Dennison Bldg., 8 Inst. de Astrofisica de Canarias, 90146 Palermo, 91125, 9 University of Lodz, A.A.Mokrushina (46), A. Babic (5), A. Biland (11), A. Carosi (3), A.C.S. Readhead (41), A. De Angelis (2), A. Dom\\'inguez (15, A. Gonz\\'alez Mu\\~noz (1), A. Herrero (8), A. La Barbera (3), A. L\\\"ahteen\\\"aki (39, A. L\\'opez-Oramas (1), A.Manilla-Robles (57), A. Marscher (43), A. Moralejo (1), A. Niedzwiecki (9), Ann Arbor, A. Overkemping (14), Apartado 3004, A. Saggion (16), A. Sandrinelli (16), A.Sievers (61), A. Sillanp\\\"a\\\"a (21), A. Stamerra (3), Astronautical Science, Astronomy, A. Treves (17), Auf dem Huegel 69, Avenida Divina Pastora 7, B. De Lotto (2), BG-1784 Sofia, Birkenhead, B. Marcote (23), Boston University, Bulgaria, B. Zarpudin (37), CA, CA 92521, Caltech, Cambridge, Campus UAB, C.Casadio (51), C. Delgado Mendez (13), CERES-IEEC, C. Fruck (6), CH41 1LD, CH-8093 Zurich, Chuo-ku, C.M. Raiteri (38), C. Mundell (36), College Park, Como, correspondence to: E. Lindfors (elilin@utu.fi), C. Pittori (34), Croatia, C. Schultz (16), CSIC, D-15738 Zeuthen, D-44221 Dortmund, D-80805 Munchen, D-97074 Wurzburg, D.A.Blinov (49, D.A.Morozova (46), D. Carreto-Fidalgo (7), D. Dominis Prester (5), D. Dorner (12), D. Eisenacher (12), D. Elsaesser (12), Departament de F{\\i}sica, Department of Astronomy, Department of Physics, D. Ferenc (5), D. F. Torres (19), D. Garrido Terrats (18), D. Hadasch (19), D. Hildebrand (11), D. Hrupec (5), Division of Physics, D. Lelas (5), D. Mazin (6), D. Nakajima (20), D. Paneque (6), D.Riquelme (61) (1 IFAE, D. Sobczynska (9), D. Tescaro (8), E-08028 Barcelona, E-08193 Bellaterra, E-18080 Granada, E-28040 Madrid, E-28049 Madrid, E-38200 La Laguna, E.Angelakis (60), E. Bernardini (10), E. Carmona (13), E. Colombo (8), E. Farina (17), Egerton Wharf, E.G.Larionova (46), E. Lindfors (21, E. Lorenz (6), Engineering, E.N.Kopatskaya (46), E.Ovcharov (58), E. Prandini (11), Espoo, F. Borracci (6), F. D'Ammando (33, F. Dazzi (6), Finland, F. Lucarelli (34), F. Prada (15, F. Spanier (12), F. Tavecchio (3), F. Tavecchio (fabrizio.tavecchio@brera.inaf.it), F. Verrecchia (34) (for the AGILE Collaboration), F. Zandanel (15, G. Bonnoli (3), G. De Caneva (10), G. De Caneva (gessica.de.caneva@desy.de)), Georgia, Germany, G. Maneva (22), Granada, Greece, Greenbelt, H.C.Lin (50), H.D.Aller (59), Heraklion, H. Kellermann (6), H. Kubo (20), HR-10000 Zagreb, H. Takami (20), H.Ungerechts (61), I00040 Monte Porzio Catone (RM), I-00136 Rome, I-06123 Perugia, I-22100 Como, I-33100 Udine, I-35131 Padova, I-53100 Siena, I-56126 Pisa, I.Agudo (51, ICC, IEEC-UB, I. Lozano (7), I.Metodieva (58), IN 47907, INAF-OAR, I.Nestoras (60), INFN, INFN Pisa, INFN Trieste, I. Puljak (5), I. Snidaric (5), I. Steele (36), I.S.Troitsky (46), Italy, J.A.Acosta-Pulido (56, J. A. Barrio (7), Jagiellonian University, Japan, JAXA, J.A.Zensus (60), J. Becerra Gonz\\'alez (8, J. Cortina (1), J. Herrera (8), Jhongli 32001, J. Hose (6), J. Krause (6), J. Kushida (20), J. L. Contreras (7), J.L.G\\'omez (51), J.L. Richards (42), J. M. Miranda (4), J. M. Paredes (23), J. Rico (1), J. Rodriguez Garcia (6), J. Sitarek (1), J.Sitarek (jsitarek@ifae.es), J. Storz (12), J. Thaele (14), Kanagawa 252-5210, Kazan Federal University, K. Frantzen (14), K. Kodani (20), K. Mallot (10), K. Mannheim (12), K. Nilsson (21, K. Nishijima (20), K. Noda (6), Konigstuhl 12, K. Saito (20), K. Saito (ksaito@icrr.utokyo.ac.jp), K. Satalecka (7), Kylmala, Kyoto University, L. A. Antonelli (3), La Laguna, Lausanne, L. Font (18), L.Fuhrmann (60), Liverpool John Moores University, L. Maraschi (3), Local 20, L. Stawarz (62, L. Takalo (21), L.V.Larionova (46), MA 02138 USA, MAGIC Collaboration: J. Aleksi\\'c (1), M.A. Gurwell (45), MD 20742, MD 20771, M. Doert (14), M. Doro (16), Medioambientales y Tecnologicas, Metsahovintie 114, M.F.Aller (59), M. Garczarczyk (10), M. Gaug (18), M. Giroletti (44), M.G.Nikolashvili (53), M. Hayashida (20), MI 48109-1042, M.I.Carnerero (38, M. L\\'opez (7), M. Makariev (22), M. Mariotti (16), M. Mart\\'inez (1), M. Meucci (4), M. Orienti (44) (for the Fermi-LAT Collaboration), M. Palatiello (2), M. Persic (2, M. Rib\\'o (23), M. Strzys (6), M. Teshima (6), Mt. Kanobili, M. Tornikoski (39), M. Uellenbeck (14), M. V. Fonseca (7), M. Villata (38), National Central University, Netherlands, N. Godinovi\\'c (5), NL-7990 AA Dwingeloo, N. Lewandowska (12), N. Mankuzhiyil (2), N. Nowak (6), N.Panwar (50), Nucl. Energy, O. Blanch (1), O.M.Kurtanidze (53, Oskar Klein Centre for Cosmoparticle Physics, O. Tibolla (12), P. Antoranz (4), Pasadena, P. Bangale (6), P. Colin (6), P. Da Vela (4), P. G. Prada Moroni (24), PL-90236 Lodz, P. Munar-Adrover (23), Poland, Postbus 2, P. Temnikov (22), Purdue University, P. Vogler (11), R.A.Chigladze (53), R. J. Garc\\'ia L\\'opez (8), R. L\\'opez-Coto (1), R. Mirzoyan (6), R. M. Wagner (6, Roma, R. Orito (20), R. Paoletti (4), R. Reinthal (21), Rudjer Boskovic Institute, Russia, R. Zanin (23), Sagamihara, S. Ansoldi (2), S. Bonnefoy (7), S. Buson (16), S. Covino (3), SE-106 91 Stockholm, S. Einecke (14), S. Jorstad (43), S. Lombardi (3), S.N.Molina (51), S. N. Shore (24), S.O.Kurtanidze (53), S. Paiano (16), Spain, Spain 53 Abastumani Observatory, Spain 62 Institute of Space, S. Partini (4), S. Preziuso (4), S. R. Gozzini (10), S. R\\\"ugamer (12), S. Sun (6), St.-Petersburg, St.-Petersburg Branch, St.-Petersburg State Univ., S. Vercellone (35), Sweden, Switzerland, Taiwan, Tatarstan, T. Bretz (12, Tenerife, The Netherlands, T. Hovatta (41), T.P.Krichbaum (60), T. Saito (20), T. Schweizer (6), T.S.Konstantinova (46), T. Steinbring (12), T. Suri\\'c (5), T. Terzi\\'c (5), T. Toyama (6), Tuorla Observatory, Turku, Twelve Quays House, UAM/CSIC, U. Barres de Almeida (6), UC Riverside, UK, U. Menzel (6), Universidad de La Laguna, Universitat Autonoma de Barcelona, Universit degli Studi di Perugia, University of Amsterdam, University of Maryland, University of Michigan, University of Oulu, University of Rijeka, University of Split, University of Turku, U.S.A, U.S.A., USA, USA 28 now at: Finnish Centre for Astronomy with ESO (FINCA), V.Bozhilov (58), Via A. 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