Unfolded spectrum of Model 2 (top-left panel) using a 0.3–10 keV NICER/XTI spectrum (black color) combined with a 4–50 keV NuSTAR/(FPMA+FPMB) spectrum (red color), the colors of the components are described in the text. Residuals adopting Model 2 and adopting Model 1 are shown in the middle-left panel and bottom-left panel, respectively. Unfolded spectrum and residuals of Model 3 in top-right and bottom-right panel, respectively.