%0 Journal Article %A Antoranz Canales, Pedro %A Barrio Uña, Juan Abel %A Contreras González, José Luis %A Fonseca González, Mª Victoria %A López Moya, Marcos %A Miranda Pantoja, José Miguel %A Nieto, Daniel %T MAGIC observations of PG 1553+113 during a multiwavelength campaign in July 2006 %D 2009 %@ 0004-6361 %U https://hdl.handle.net/20.500.14352/44001 %X The active galactic nucleus PG1553+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 5.0 sigma. The integral flux above 150 GeV was (2.6 +/- 0.9) x 10(-7) ph s(-1) m(-2). By fitting the differential energy spectrum with a power law, a spectral index of -4.1 +/- 0.3 was obtained. %~