Fig. 3
Spectra of gamma rays from production and decays of neutral pions for the proton spectra shown in Fig. 2. The data points show the results of Fermi-LAT (Giordano et al. 2012; diamonds) and Veritas (Acciari et al. 2011; circles). The shaded area represents the preliminary data recently presented by the VERITAS collaboration (Park 2015).
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