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Fig. 8.

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Limits for a steady-wind profile. Left: likelihood profiles for different exposures considering the average density derived from a ρw steady-wind profile with m = 1, rescaling Fig. 7, right panel. Right: limits on the average cumulated total CR energy ⟨ECR⟩ for different exposure times ΔT. ⟨ECR⟩ is computed for different efficiencies η and velocity profiles with m = 1 (solid line), m = 0.83 (dashed line, as for SN 1993J), and m = 0.5 (dotted line) using RSG = 10−2 M yr−1 and uw = 100 km s−1. For visualisation purposes, Fermi-LAT limits are only plotted for m = 1. Colours represent the same exposures as in Fig. 7.

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