Fig. 6
Data/model ratio of the NuSTAR spectra of Ark 120 obtained on 2014 March 22, fitted with a Galactic absorbed power-law continuum model (Γ = 1.92 ± 0.02) over the 3.5–10 keV energy range (excluding the 5.5–7.5 keV energy range, that is, the Fe K complex) and then extrapolated over the 3.5–79 keV energy range. In addition to the prominent Fe Kα complex, a significant hard X-ray excess is present. Red: NuSTAR FPMA, and green: NuSTAR FPMB.
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