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

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dc.creatorMAGIC Collaboration
dc.creatorAliu, E.
dc.date2008-10-26
dc.date2009-01-22
dc.date.accessioned2026-07-07T12:32:24Z
dc.date.available2026-07-07T12:32:24Z
dc.descriptionThe MAGIC telescope observed the region around the distant blazar 3C 66A for 54.2 h in 2007 August-December. The observations resulted in the discovery of a gamma-ray source at energies above 150 GeV centered at celestial coordinates RA=2h23m12s and DEC=43deg0.7' (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)) 10^(-11) TeV^(-1)cm^(-2)s^(-1) at 300 GeV and a photon index Gamma=-3.10+-0.31_(stat)+-0.2_(syst). No significant variability of the signal was found during the observation period.
dc.description5 pages, 4 figures, accepted for publication in ApJL. Small corrections
dc.identifierhttps://arxiv.org/abs/0810.4712
dc.identifierhttp://arxiv.org/abs/0810.4712
dc.identifierAstrophysical Journal Letters 692 (2009) 29-33
dc.identifierdoi:10.1088/0004-637X/692/1/L29
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/216769
dc.subjectAstrophysics
dc.titleDiscovery of a very high energy gamma-ray signal from the 3C 66A/B region
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