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Fig. 4.
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Correlation plot of the bulk Lorentz factor Γ2 = Γ/100 with the isotropic luminosity Liso, 52 = Liso/(1052 erg s−1) for the prompt emission. The best exponential fit is shown as a dashed line, with the 3σ error bands represented by the blue, shaded regions. GRB data are taken from Ghirlanda et al. (2018).
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