Fermi-LAT SED of the three components included in the best spatial model (Model 6): the H.E.S.S. Top panel: NE limb. Middle panel: point source coincident with the SW limb. Bottom panel: Hα component. For all SEDs, blue error bars represent the statistical uncertainties, while the red ones correspond to the statistical and systematic uncertainties added in quadrature. For upper limits, the two red arrows indicate the extrema of upper limits obtained with the different systematics. The solid and dashed blue lines represent the best spectral fit and its 68% confidence band. For the NE and SW components, the green spectral points indicate the spectra derived for Model 8 using the two radio halves (only statistical errors are presented for better visibility; systematic uncertainties for this model are indicated in Table 3).