SED derived in this analysis, as well as X-ray SED by XMM-Newton (Funk et al. 2007), Chandra (Helfand et al. 2007), and INTEGRAL (Ubertini et al. 2005), and the SED derived in the analysis of VLA data (Brogan et al. 2005a), compared to the SED curves expected from the leptonic model obtained with GAMERA. Left: full energy range. Right: comparison between the γ ray flux estimated from the leptonic model from 0–1.6 kyrs and the last 2.5 kyrs and the emission observed from HESS J1813–178B and HESS J1813–178A respectively. The shaded grey error bands indicate the possible parameter space, given in Table 6.