X-ray/γ-ray range of the CSB SED. The emission model (thick solid curve), including total (i.e., primary plus secondary) Compton/M82-EBL-CMB radiation (dashed curve) and NT bremsstrahlung (dash-dotted curve), and a pionic component (dotted curve), is overlaid with data from Tables 2–4 (black dots). The leptonic component is dominated by the Comptonization of the local FIR radiation. The 5 keV flux, resulting from the NT 4−8 keV flux measured by Iwasawa et al. (2023), is fit by (basically) the local Compton/FIR yield, in which the secondary electron spectrum is uniquely set by the CRp spectrum fit to the γ-ray data and the primary-electron spectrum is normalized to match the 5 keV flux.