Fitted model spectra for the FCES G78.74+1.56 and FCES G80.00+0.50 emission components, for model setup L1 (top) and L2 (bottom). A fit of the model to the spectrum of FCES G78.74+1.56 is done first, with the injection luminosity as fitting parameter, followed by a second fit of the Bremsstrahlung emission only to the spectrum of FCES G80.00+0.50, with ionised gas column density as fitting parameter. This last fit does not include a contribution to the emission from a background population of CRs (see text). The dashed blue line is the inverse-Compton contribution in the emission model for FCES G78.74+1.56. The first χ² corresponds to the fit to FCES G78.74+1.56 and the second one to FCES G80.00+0.50.