Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-07-06
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
Contributions to the 31st International Cosmic Ray Conference
Scientific paper
The MAGIC telescope observed the region around the distant blazar 3C 66A for 54.2 hr in 2007 August-December. The observations resulted in the discovery of a gamma-ray source centered at celestial coordinates R.A. = 2h23m12s and decl.= 43deg 0.7arcmin (MAGIC J0223+430), coinciding with the nearby radio galaxy 3C 66B. A possible association of the excess with the blazar 3C 66A is discussed. The energy spectrum of MAGIC J0223+430 follows a power law with a normalization of (1.7+-0.3_stat+-0.6_syst) x 10^-11 TeV^-1 cm-2 s-1 at 300 GeV and a photon index of 3.10+-0.31_stat+-0:2syst.
Errando Manel
Lindfors Elina
Mazin Daniel Dr.
Prandini Elisa
Tavecchio Fabrizio
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