Pulse-phase dependence of the polarimetric properties. From top to bottom: Total flux normalized to the average, normalized Stokes parameters q = Q/I and u = U/I, and the PD and PA observed by IXPE during the interval MJD 60 367.6–60 376.5 as a function of the spin phase. The solid red line indicates the model obtained by fitting the absolute Stokes parameters assuming two point-like spots and the parameters listed in the text.