Dependence of the normalized flux in the 2–8 keV energy band, normalized Stokes parameters q and u (based on the formalism by Kislat et al. 2015), PD, and PA (from the spectro-polarimetric analysis) on the pulse phase for two IXPE observations separately (left) and combined (right). Data from the three IXPE telescopes are combined. Vertical dash-dotted lines show the positions of two minima in the profile and are added for illustrative purposes. The black solid line in the bottom right panel shows the best-fit rotating vector model (see Sect. 4.2).