Fig. 7.
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Polarisation position angle as a function of rotational phase for PSR J0740+6620 as measured with the NRT at 1.4 GHz. The best values for the non-shifted PPA are α = 79° and ζ = 89°, whereas for the PPA shifted in phase by 0.03, the values are α = 74° and ζ = 88°. The radio pulse profile is shown in red for better identification of both pulses.
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