Overall spectral energy distribution for the estimated best-fitting parameters (after minimising for fixed values of α) is shown. The value of α characterises the radial decrease of the magnetic field B ∝ r^−α (see Eq. (14)). While the synchrotron part of the spectral energy distribution is almost degenerate with respect to the choice of α, the inverse Compton dominated part (right panel) shows noticeable differences up to the peak at approximately 10¹¹ eV. Note, in the left panel the sum of synchrotron and inverse Compton emission is shown, while in the right panel, the SED of the inverse Compton emission is additionally superimposed.