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Article

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Published version

Publication date

2009-01-21

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/150145

Discovery of a very high energy gamma-ray signal from the 3C 66A/B region

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https://doi.org/10.1088/0004-637X/692/1/L29

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.

Subject

Raigs gamma, Observacions astronòmiques, Galàxies

Subject (English)

Gamma rays, Astronomical observations, Galaxies

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Articles publicats en revistes (Física Quàntica i Astrofísica)

Citation

MAGIC Collaboration, et al. Discovery of a very high energy gamma-ray signal from the 3C 66A/B region. Astrophysical Journal Letters. 2009. Vol. 692, num. 1, pags. 29-33. ISSN 2041-8205. [consulted: 9 of August of 2026]. Available at: https://hdl.handle.net/2445/150145

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