Notes. (1) Model (see Table 3), (2) abbreviation of the telescope name: XMM stands for XMM-Newton, while Nu for NuSTAR (FPMA and FPMB are indicated in parentheses), respectively, (3) cross-calibration constant, (4) intrinsic hydrogen column density, (5–6) photon index and normalization of the power-law emission component, (7–8) temperature and normalization of the collisionally ionized thermal plasma, (9) ratio of the χ² fitting statistics to degrees of freedom. For clarity, we split analyses that were performed individually (top panel) from those in which the data taken with different instruments were fitted simultaneously (bottom panel). The models include Galactic hydrogen column density N_H, Gal = 5.90 × 10²⁰ cm⁻² and thermal component assumes solar abundance. Values without errors were fixed during the fit. The normalizations are ph keV⁻¹ cm⁻² s⁻¹ at 1 keV for the power-law component, , assuming uniform ionized plasma with electron and H number densities n_e and n_H, respectively, and volume V, all in cgs units, for the thermal component, and total number of ph cm⁻² s⁻¹ in the line for the Gaussian component.