Fig. 9
Upper limit for the Compton parameter Y, the estimate of ϵe, and the lower limits for ϵB as a function of the prompt flux for the sample of GRBs with measured Epeak. When β cannot be constrained from the spectral analysis, a value of β = 2.36 is assumed (red stars). In the other cases the value derived from the spectral fit is adopted (blue circles).
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