Fig. 14
The ratio between data the best model including two thermal components, a power law component and a narrow Gaussian emission line at 6.18 keV (6.44 keV rest frame, iron Kα). Black triangles = Chandra data; red dots = NuSTAR data. A strong excess around 6 keV and a deficit of counts around 7 keV are seen. Note that the NuSTAR data, even taking into account the lower spectral resolution, follow the Chandra data.
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