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Fig. 3

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3C 58 spectral energy distribution in the range between 0.1 GeV and 20 TeV. Red circles are the VHE points reported in this work. The best-fit function is drawn in red and the systematic uncertainty is represented by the yellow shaded area. Black squares and black arrows are taken from the Fermi-LAT second pulsar-catalog results (Abdo et al. 2013). Blue squares are taken from the Fermi high-energy LAT catalog (Ackermann et al. 2013). The magenta line is the SED prediction for 3C 58 taken from Fig. 10 of Bednarek & Bartosik (2003). The clear green dashed-dotted line is the SED predicted by Tanaka & Takahara (2013), assuming an age of 1 kyr, and the dark green dotted line is the prediction from the same paper, assuming an age of 2.5 kyr. The blue dashed line represents the SED predicted by Torres et al. (2013) assuming that the Galactic far-infrared (FIR) background is high enough to reach a flux detectable by the MAGIC sensitivity in 50 h.

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