Impact of the electron slope p: spectral evolution. The time evolution of the observed peak energy Ep,obs (top) and low-energy photon index α (bottom) in case B is plotted for different values of the relativistic electron slope p. The evolution for p = 3.3 and p = 3.9 has also been computed but is not shown because the curves coincide with the case p = 2.9. In each case, the value of ζ is adjusted to keep the same observed peak energy of the time-integrated spectrum (see Table 1).
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