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Fig. 4.

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Marginalised posterior distributions for the spectral fit of the afterglow observations of GRB 190114C at tobs = 90 s. The total (black) is subdivided between the slow (blue) and fast (red) cooling cases. The first row shows the four free parameters explored in this MCMC analysis (Γ, ϵe/ϵB, B and γm). In the second row, we show some derived quantities: γ ^ m / γ m $ \widehat{\gamma}_{\mathrm{m}} / \gamma_{\mathrm{m}} $, γc/γm and B3. The bottom right panel shows the distribution of the radiative regimes found in the posterior sample (see Appendix B for their description). The best-fit model for each radiative regime is shown in Fig. 3.

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