Se p 20 09 Discovery of Very High Energy γ - rays from the blazar S 5 0716 + 714

ETH Zurich, CH-8093 Switzerland INAF National Institute for Astrophysics, I-00136 Rome, Italy Universidad Complutense, E-28040 Madrid, Spain Technische Universität Dortmund, D-44221 Dortmund, Germany Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain Università di Padova and INFN, I-35131 Padova, Italy Inst. de Astrof́ısica de Canarias, E-38200 La Laguna, Tenerife, Spain University of Lódź, PL-90236 Lodz, Poland Deutsches Elektronen-Synchrotron (DESY), D-15738 Zeuthen, Germany Max-Planck-Institut für Physik, D-80805 München, Germany Università di Siena, and INFN Pisa, I-53100 Siena, Italy Universitat de Barcelona (ICC/IEEC), E-08028 Barcelona, Spain Universität Würzburg, D-97074 Würzburg, Germany IFAE, Edifici Cn., Campus UAB, E-08193 Bellaterra, Spain Depto. de Astrof́ısica, Universidad de La Laguna, E-38206 La Laguna, Tenerife, Spain Università di Udine, and INFN Trieste, I-33100 Udine, Italy Institut de Ciències de l’Espai (IEEC-CSIC), E-08193 Bellaterra, Spain Inst. de Astrof́ısica de Andalućıa (CSIC), E-18080 Granada, Spain Rudjer Boskovic Institute, Bijenicka 54, HR-10000 Zagreb, Croatia University of California, Davis, CA-95616-8677, USA Tuorla Observatory, University of Turku, FI-21500 Piikkiö, Finland Inst. for Nucl. Research and Nucl. Energy, BG-1784 Sofia, Bulgaria INAF/Osservatorio Astronomico and INFN, I-34143 Trieste, Italy ICREA, E-08010 Barcelona, Spain Università di Pisa, and INFN Pisa, I-56126 Pisa, Italy supported by INFN Padova now at: Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas deceased Send off-print requests to Elina Lindfors [email protected] and Daniel Mazin [email protected]