MONK simulations of the Π and Ψ of the Comptonized+disk emission as a function of the energy in the 2–8 keV band for slab- and spreading layer-like configurations (blue and red respectively), along with a spreading layer case with the addition of the reflection component with P_refl = 10% and Ψ_refl = 180° (green). The inclination of the system is 60°. The gray regions correspond to IXPE results at 90% confidence level obtained by applying polconst to the two best-fit models (Sect. 3.3). The polarization angle in MONK is measured from the projection of the rotation axis onto the sky plane.