Gamma-ray model curves and parent particle energy spectra. On the left, the best-fit electron and proton gamma-ray models (broken power laws with exponential cut-offs) are compared to the Fermi-LAT and H.E.S.S. data. The data points and model curves are the same as in Fig. 5. On the right, the corresponding best-fit parent particle energy spectra are shown. The electron model is derived from a combined fit to both the X-ray and gamma-ray data.