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Aliu, E.; Antoranz, P.; Bartko, H.; Bastieri, D.; Becker, J. K.; Bednarek, W.; Berdyugin, A.; Berger, K.; Bigongiari, C.; Bock, R. K.; Bordas, P.; Bretz, T.; Britvitch, I.; Camara, M.; Carmona, E.; Chilingarian, A.; Commichau, S.; Contreras, J. L.; Cortina, J.; Dazzi, F.; De Angelis, A.; Delgado, C.; de los Reyes, R.; De Lotto, B.; Dorner, D.; Doro, M.; Errando, M.; Fagiolini, M.; Firpo, R.; Fonseca, M. V.; Font, L.; Fuchs, M.; Galante, N.; García-López, R. J.; Garczarczyk, M.; Gaug, M.; Goebel, F.; Hakobyan, D.; Hayashida, M.; Hengstebeck, T.; Herrero, A.; Höhne, D.; Hose, J.; Hsu, C. C.; Huber, S.; Jogler, T.; Kosyra, R.; Laille, A.; Lindfors, E.; López, M.; Majumdar, P.; Maneva, G.; Mariotti, M.; Martínez, M.; Mazin, D.; Merck, C.; Meucci, M.; Meyer, M.; Mirzoyan, R.; Mizobuchi, S.; Moralejo, A.; Nieto, D.; Nilsson, K.; Ninkovic, J.; Oña-Wilhelmi, E.; Otte, N.; Oya, I.; Paoletti, R.; Pasanen, M.; Pauss, F.; Pegna, R.; Prandini, E.; Puchades, N.; Rico, J.; Rissi, M.; Robert, A.; Rügamer, S.; Saggion, A.; Saito, T. Y.; Sánchez, A.; Sartori, P.; Scapin, V.; Schweizer, T.; Shayduk, M.; Shinozaki, K.; Shore, S. N.; Sidro, N.; Sillanpää, A.; Sobczynska, D.; Spanier, F.; Stamerra, A.; Stark, L. S.; Temnikov, P.; Tescaro, D.; Teshima, M.; Torres, D. F.; Venturini, A.; Zandanel, F.; Zanin, R.; Zapatero, J.
Astronomy and astrophysics (Berlin), 01/2009, Letnik: 493, Številka: 2Journal Article
The active galactic nucleus PG 1553+113 was observed by the MAGIC telescope in July 2006 during a multiwavelength campaign, in which telescopes in the optical, X-ray, and very high energies participated. Although the MAGIC data were affected by strong atmospheric absorption (calima), they were analyzed after applying a correction. In 8.5 h, a signal was detected with a significance of 5.0σ. The integral flux above 150 GeV was $(2.6\pm0.9)\times 10^{-7}~{\rm ph\,s^{-1}\,m^{-2}}$. By fitting the differential energy spectrum with a power law, a spectral index of $-4.1\pm0.3$ was obtained.
