Fig. 8.
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Necessary parameter condition for the different knot environments C, NE, and P1–P4 to explain the observed γ-ray flux of 8.2 × 1039 erg s−1 at 17 GeV by hadronic pion production. Here a knot velocity of vb = 0.075 c is used as well as γp, min = 1. and γp, max = 2 × 103 to obtain a cut-off in the resulting γ-ray flux at about a few ×10 GeV as indicated by the observations.
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