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Fig. 6
Deduced lower limit of Γ0 as a function of the photon index β using Lithwick & Sari (2001) for episode I at t0 (continuous line), episode II at t0+630 s (dashed line) and episode III at t0+830 s (dashed-dotted line). The red vertical line indicates the photon index of the Band model of the first emission epoch.
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