Simultaneous XMM-Newton/pn and NuSTAR spectra of Ark 120 obtained on 2014 March 22 fitted with model assuming a coronal geometry. Top panel: fit over the 3–79 keV energy range (see Table 5). The extrapolation down to 0.3 keV clearly shows that the soft excess is not accounted for. Bottom panel: fit over the 0.3–79 keV energy range. The corresponding fit parameters are reported in Table 6. The reflection model clearly leaves a strong hard X-ray excess above 30 keV and thus cannot account simultaneously for the soft and hard bands. Black: XMM-Newton/pn spectrum, red: NuSTAR FPMA, and green: NuSTAR FPMB.