Polarization contour plots from the spectropolarimetric analysis in the 2–8 keV energy range of Obs. 1 (top panel) and Obs. 2 (bottom panel). The polconst polarimetric model is applied separately to the diskbb component of both IXPE observations and to the (expabs*powerlaw+thcomp*bbodyrad) components as a whole. The expabs*powerlaw component (labeled pl. in the legend) is included only in Obs. 1. Contour plots are computed for the four parameters of interest, taking into account the fact that the polarization of the disk and Comptonization components are correlated in the simultaneous fit.