Normalized pulse profiles integrated to 3 energy bins for the synthetic data. The solid black contour shows a 95% and the dashed black contour a 68% highest posterior density credible region. The green solid line shows the best-fit solution. The observed data converted to the physical units using the best-fit model are shown with blue circles with the error bars according to the Poisson noise. The 0.5% calibration error of the detector, used in the fitting procedure, is not included to the error bars.