Multifrequency Studies of the Peculiar Quasar 4C +21.35 During the 2010 Flaring Activity

9) R. Bellazzini (10) E. Bissaldi (11) E. Bonamente (5 4) J. Bregeon (10) M. Brigida (12 13) P. Bruel (14) R. Buehler (1) S. Buson (8 G. A. Caliandro (3) R. A. Cameron (3) P. A. Caraveo (15) E. Cavazzuti (16) C. Cecchi (5 R. C. G. Chaves (17) A. Chekhtman (18) J. Chiang (3) G. Chiaro (9) S. Ciprini (16 19) R. Claus (3) J. Cohen-Tanugi (20) J. Conrad (21 22 23 24) S. Cutini (16 F. D'Ammando (25) F. de Palma (12 C. D. Dermer (26) E. do Couto e Silva (3) D. Donato (27 28) P. S. Drell (3) C. Favuzzi (12 J. Finke (26) W. B. Focke (3) A. Franckowiak (3) Y. Fukazawa (29) P. Fusco (12 F. Gargano (13) D. Gasparrini (16 N. Gehrels (30) N. Giglietto (12 F. Giordano (12 M. Giroletti (25) G. Godfrey (3) I. A. Grenier (17) S. Guiriec (30 31) M. Hayashida (32) J. W. Hewitt (30) D. Horan (14) R. E. Hughes (33) G. Iafrate (6 34) A. S. Johnson (3) J. Knodlseder (35 36) M. Kuss (10) J. Lande (3) S. Larsson (21 37) L. Latronico (38) F. Longo (6 F. Loparco (12 M. N. Lovellette (26) P. Lubrano (5 M. Mayer (1) M. N. Mazziotta (13) J. E. McEnery (30 P. F. Michelson (3) T. Mizuno (39) M. E. Monzani (3) A. Morselli (40) I. V. Moskalenko (3) S. Murgia (41) R. Nemmen (30) E. Nuss (20) T. Ohsugi (39) M. Orienti (25) E. Orlando (3) J. S. Perkins (30) M. Pesce-Rollins (10) F. Piron (20) G. Pivato (9) T. A. Porter (3) S. Rain\`o (12 M. Razzano (10 42) A. Reimer (43 3) O. Reimer (43 D. A. Sanchez (44) A. Schulz (1) C. Sgr\`o (10) E. J. Siskind (45) G. Spandre (10) P. Spinelli (12 L. Stawarz (46 47) H. Takahashi (30) T. Takahashi (46) J. G. Thayer (3) J. B. Thayer (3) D. J. Thompson (30) M. Tinivella (10) D. F. Torres (48 49) G. Tosti (5 E. Troja (30 T. L. Usher (3) J. Vandenbroucke (3) V. Vasileiou (20) G. Vianello (3 50) V. Vitale (40 51) M. Werner (43) B. L. Winer (33) D. L. Wood (52 K. S. Wood (26) (the Fermi Large Area Telescope Collaboration) J. Aleksic (53) S. Ansoldi (54) L. A. Antonelli (55) P. Antoranz (56) A. Babic (57) P. Bangale (58) U. Barres de Almeida (58) J. A. Barrio (59) J. Becerra Gonzalez (60) W. Bednarek (61) K. Berger (60) E. Bernardini (1) A. Biland (62) O. Blanch (53) R. K. Bock (58) S. Bonnefoy (59) G. Bonnoli (55) F. Borracci (58) T. Bretz (63 74) E. Carmona (64) A. Carosi (55) D. Carreto Fidalgo (63) P. Colin (58) E. Colombo (60) J. L. Contreras (59) J. Cortina (53) S. Covino (55) P. Da Vela (56) F. Dazzi (8 A. De Angelis (54) G. De Caneva (1) B. De Lotto (54) C. Delgado Mendez (64) M. Doert (65) A. Dominguez (66 75) D. Dominis Prester (57) D. Dorner (63) M. Doro (8 S. Einecke (65) D. Eisenacher (63) D. Elsaesser (63) E. Farina (67) D. Ferenc (57) M. V. Fonseca (59) L. Font (68) K. Frantzen (65) C. Fruck (58) R. J. Garcia Lopez (60) M. Garczarczyk (1) D. Garrido Terrats (68) M. Gaug (68) G. Giavitto (53) N. Godinovic (57) A. Gonzalez Munoz (53) S. R. Gozzini (1) D. Hadasch (49) A. Herrero (60) D. Hildebrand (62) J. Hose (58) D. Hrupec (57) W. Idec (61) V. Kadenius (69) H. Kellermann (58) M. L. Knoetig (58) K. Kodani (70) Y. Konno (70) J. Krause (58) H. Kubo (70) J. Kushida (70) A. La Barbera (55) D. Lelas (57) N. Lewandowska (63) E. Lindfors (69 76) S. Lombardi (55) M. Lopez (59) R. Lopez-Coto (53) A. Lopez-Oramas (53) E. Lorenz (58) I. Lozano (59) M. Makariev (71) K. Mallot (1) G. Maneva (71) N. Mankuzhiyil (54) K. Mannheim (63) L. Maraschi (55) B. Marcote (72) M. Mariotti (8 M. Martinez (53) D. Mazin (58) U. Menzel (58) M. Meucci (56) J. M. Miranda (56) R. Mirzoyan (58) A. Moralejo (53) P. Munar-Adrover (72) D. Nakajima (58) A. Niedzwiecki (61) K. Nishijima (70) K. Nilsson (69 N. Nowak (58) R. Orito (70) A. Overkemping (65) S. Paiano (8 M. Palatiello (54) D. Paneque (58) R. Paoletti (56) J. M. Paredes (72) X. Paredes-Fortuny (72) S. Partini (56) M. Persic (54 11) F. Prada (66 77) P. G. Prada Moroni (73) E. Prandini (8 S. Preziuso (56) I. Puljak (57) R. Reinthal (69) W. Rhode (65) M. Ribo (72) J. Rico (53) J. Rodriguez Garcia (58) S. Rugamer (63) A. Saggion (8 T. Saito (70) K. Saito (70) M. Salvati (55) K. Satalecka (59) V. Scalzotto (8 V. Scapin (59) C. Schultz (8 T. Schweizer (58) S. N. Shore (73) A. Sillanpaa (69) J. Sitarek (53) I. Snidaric (6 D. Sobczynska (61) F. Spanier (63) V. Stamatescu (53) A. Stamerra (55) T. Steinbring (63) J. Storz (63) S. Sun (58) T. Suric (57) L. Takalo (69) H. Takami (70) F. Tavecchio (55) P. Temnikov (71) T. Terzic (57) D. Tescaro (60) M. Teshima (58) J. Thaele (65) O. Tibolla (63) T. Toyama (58) A. Treves (67) P. Vogler (62) R. M. Wagner (58) F. Zandanel (66 79) R. Zanin (72) (the MAGIC Collaboration) M. F. Aller (80) E. Angelakis (81) D. A. Blinov (82) S. G. Djorgovski (83) A. J. Drake (83) N. V. Efimova (82 84) M. A. Gurwell (85) D. C. Homan (86) B. Jordan (87) E. N. Kopatskaya (84) Y. Y. Kovalev (88 81) O. M. Kurtanidze (89 90) A. Lahteenmaki (91) V. M. Larionov (82 84 92) M. L. Lister (93) E. Nieppola (91 94) M. G. Nikolashvili (89) E. Ros (81 95) T. Savolainen (81) L. A. Sigua (89) M. Tornikoski (91). ((1) Deutsches Elektronen Synchrotron DESY Germany (2) Space Sciences Laboratory University of California Berkeley USA (3) W. W. Hansen Experimental Physics Laboratory Kavli Institute for Particle Astrophysics Cosmology Department of Physics SLAC National Accelerator Laboratory Stanford University (4) Dipartimento di Fisica Universit\`a degli Studi di Perugia Italy (5) Istituto Nazionale di Fisica Nucleare Sezione di Perugia (6) Istituto Nazionale di Fisica Nucleare Sezione di Trieste (7) Dipartimento di Fisica Universit\`a di Trieste (8) Istituto Nazionale di Fisica Nucleare Sezione di Padova (9) Dipartimento di Fisica e Astronomia "G. Galilei" Universit\`a di Padova (10) Istituto Nazionale di Fisica Nucleare Sezione di Pisa (11) Istituto Nazionale di Fisica Nucleare (12) Dipartimento di Fisica "M. Merlin" dell'Universit\`a e del Politecnico di Bari (13) Istituto Nazionale di Fisica Nucleare Sezione di Bari (14) Laboratoire Leprince-Ringuet Ecole polytechnique CNRS/IN2P3 Palaiseau France (15) INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica Milano (16) Agenzia Spaziale Italiana (ASI) Science Data Center Frascati (Roma) (17) Laboratoire AIM CEA-IRFU/CNRS/Universit\'e Paris Diderot Service d'Astrophysique CEA Saclay (18) Center for Earth Observing Space Research College of Science George Mason University resident at Naval Research Laboratory Washington (19) Istituto Nazionale di Astrofisica - Osservatorio Astronomico di Roma (20) Laboratoire Univers et Particules de Montpellier Universit\`e Montpellier (21) Department of Physics Stockholm University Sweden (22) The Oskar Klein Centre for Cosmoparticle Physics Stockholm (23) Royal Swedish Academy of Sciences Research Fellow funded by a grant from the K. A. Wallenberg Foundation (24) The Royal Swedish Academy of Sciences (25) INAF Istituto di Radioastronomia Bologna (26) Space Science Division Naval Research Laboratory (27) Center for Research Exploration in Space Science Technology (CRESST) NASA Goddard Space Flight Center Greenbelt (28) Department of Physics Department of Astronomy University of Maryland (29) Department of Physical Sciences Hiroshima University Japan (30) NASA Goddard Space Flight Center (31) NASA Postdoctoral Program Fellow (32) Institute for Cosmic-Ray Research University of Tokyo (33) Department of Physics Center for Cosmology Astro-Particle Physics The Ohio State University Columbus (34) Osservatorio Astronomico di Trieste Istituto Nazionale di Astrofisica Trieste (35) CNRS IRAP Toulouse (36) GAHEC Universit\'e de Toulouse UPS-OMP (37) Department of Astronomy (38) Istituto Nazionale di Fisica Nucleare Sezione di Torino (39) Hiroshima Astrophysical Science Center (40) Istituto Nazionale di Fisica Nucleare Sezione di Roma "Tor Vergata" (41) Center for Cosmology Physics Astronomy Department Irvine (42) Funded by contract FIRB-2012-RBFR12PM1F from the Italian Ministry of Education University Research (MIUR) (43) Institut fur Astro- und Teilchenphysik Institut fur Theoretische Physik Leopold-Franzens-Universitat Innsbruck Austria (44) Max-Planck-Institut fur Kernphysik Heidelberg (45) NYCB Real-Time Computing Inc. Lattingtown NY (46) Institute of Space Astronautical Science JAXA (47) Astronomical Observatory Jagiellonian University Krakow Poland (48) Institut de Ciencies de l'Espai (IEEE-CSIC) Barcelona Spain (49) Institucio Catalana de Recerca i Estudis Avancats (ICREA) (50) Consorzio Interuniversitario per la Fisica Spaziale (CIFS) Torino (51) Dipartimento di Fisica Universit\`a di Roma "Tor Vergata" Roma (52) Praxis Inc. Alexandria (53) IFAE Bellaterra (54) Dipartimento di Fisica Universit\`a di Udine Istituto Nazionale di Fisica Nucleare Gruppo Collegato di Udine (55) INAF National Institute for Astrophysics Rome (56) Universit\`a di Siena INFN Pisa (57) Croatian MAGIC Consortium Rudjer Boskovic Institute University of Rijeka University of Split Zagreb Croatia (58) Max-Planck-Institut fur Physik Munchen (59) Universidad Complutense Madrid (60) Inst. de Astrofisica de Canarias Tenerife (61) University of Lodz (62) ETH Zurich Switzerland (63) Universitat Wurzburg (64) Centro de Investigaciones Energeticas Medioambientales y Tecnologicas (65) Technische Universitat Dortmund (66) Inst. de Astrofisica de Andalucia (CSIC) Granada (67) Universit\`a dell'Insubria Como (68) Unitat de Fisica de les Radiacions Departament de Fisica CERES-IEEC Universitat Autonoma de Barcelona (69) Tuorla Observatory University of Turku Finland (70) Japanese MAGIC Consortium Division of Physics Astronomy Kyoto University (71) Inst. for Nucl. Research Nucl. Energy Sofia Bulgaria (72) Universitat de Barcelona (ICC/IEEC) (73) Universit\`a di Pisa (74) Ecole polytechnique federale de Lausanne (EPFL) (75) Department of Physics UC Riverside (76) Finnish Centre for Astronomy with ESO (FINCA) (77) also at Instituto de Fisica Teorica UAM/CSIC (78) Stockholm University Oskar Klein Centre for Cosmoparticle Physics (79) GRAPPA Institute University of Amsterdam Netherlands (80) Department of Astronomy University of Michigan Ann Arbor (81) Max-Planck-Institut fur Radioastronomie Bonn (82) Pulkovo Observatory St. Petersburg Russia (83) Cahill Center for Astronomy Astrophysics California Institute of Technology Pasadena (84) Astronomical Institute St. Petersburg State University (85) Harvard-Smithsonian Center for Astrophysics Cambridge (86) Department of Physics Denison University Granville (87) School of Cosmic Physics Dublin Institute for Advanced Studies Ireland (88) Astro Space Center of the Lebedev Physical Institute Moscow (89) Abastumani Observatory Georgia (90) Engelhardt Astronomical Observatory Kazan Federal University Tatarstan (91) Aalto University Metsahovi Radio Observatory Kylmala (92) Isaac Newton Institute of Chile St. Petersburg Branch (93) Department of Physics Purdue University West Lafayette (94) Finnish Centre for Astronomy with ESO (FINCA) (95) Universitat de Valencia Spain)