Photon index Γ (red) and high-energy cutoff E_cut (blue) as function of ṁ_in, resulting from the spectral fit of each JED configurations (a), (b), (c), and (d) displayed in Fig. 12. No error bars on fits are displayed here for presentation purposes; errors on Γ are on the order of 0.1–0.2, and errors on E_cut are up to fewhundreds when E_cut > 100 keV and only fewpercent when E_cut ≲ 100 keV.