Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-07-04
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
Contribution to the 31st ICRC, Lodz, Poland, July 2009
Scientific paper
We report simultaneous multi-frequency observations of the blazar PG 1553+113, that were carried out in March-April 2008. Optical, X-ray, high-energy (HE; greater than 100 MeV) gamma-ray, and very-high- energy (VHE; greater than 100 GeV) gamma-ray data were obtained with the KVA, REM, RossiXTE/ASM, AGILE and MAGIC telescopes. This is the first simultaneous broad-band (i.e., HE+VHE) gamma-ray observation of a blazar. The source spectral energy distribution derived combining these data shows the usual double-peak shape, and is interpreted in the framework of a synchrotron-self-Compton model.
AGILE collaboration for the
D'Ammando Filippo
Dorner Daniela
MAGIC collaboration for the
Mankuzhiyil Nijil
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