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 γ-ray source centered at celestial coordinates R.A. = 2h23m12s and decl. = 43°0farcm7 (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 ± 0.3stat ± 0.6syst) × 10-11 TeV-1 cm-2 s-1 at 300 GeV and a photon index Γ = -3.10 ± 0.31stat ± 0.2syst.

Aliu, E., Anderhub, H., Antonelli, L.A., Antoranz, P., Backes, M., Baixeras, C., et al. (2009). Discovery of a very high energy gamma-ray signal from the 3c 66a/b region. THE ASTROPHYSICAL JOURNAL, 692(1), L29-L33 [10.1088/0004-637X/692/1/L29].

Discovery of a very high energy gamma-ray signal from the 3c 66a/b region

BONNOLI, GIACOMO
Membro del Collaboration Group
;
E. Leonardo
Membro del Collaboration Group
;
M. Meucci
Membro del Collaboration Group
;
R. Paoletti;STAMERRA, ANTONIO;TURINI, NICOLA;
2009-01-01

Abstract

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 γ-ray source centered at celestial coordinates R.A. = 2h23m12s and decl. = 43°0farcm7 (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 ± 0.3stat ± 0.6syst) × 10-11 TeV-1 cm-2 s-1 at 300 GeV and a photon index Γ = -3.10 ± 0.31stat ± 0.2syst.
Aliu, E., Anderhub, H., Antonelli, L.A., Antoranz, P., Backes, M., Baixeras, C., et al. (2009). Discovery of a very high energy gamma-ray signal from the 3c 66a/b region. THE ASTROPHYSICAL JOURNAL, 692(1), L29-L33 [10.1088/0004-637X/692/1/L29].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/41663