Fig. A.1.
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Left panels: Evolution of the Stokes parameters, polarization degree and angle. Top-right panel: q − u plane. Weighted mean of the source observations (black circles) calculated yearly and of the field stars (red cross). Bottom-right panel: EDF of measured polarization using all data points (black line) or the weighted averaged points (red line) compared with expected (theoretical) CDF of polarization measurements (blue line).
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