Outcomes of fitting one RM and one PA to all the bursts from an observation. Each plot corresponds to one observation. The top panels show PA against λ² − λ_c² where λ_c is the wavelength of the center frequency of the band. The individual data points are shown with black dots and the red line corresponds to the fitted model. The top x-axis shows frequency in MHz. The bottom panels show averaged error between data and fitted model. The horizontal black line is drawn at 0 deg.