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Fig. B.1

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Simulated ring-like source with vertical EVPAs using the EHT 2017 coverage and array properties. Left panel: Ground truth. Right panel: PSO reconstrucion (solution). The top panel show the reconstructions at full resolution; the bottom panels are blurred with a resolution of 20 µas. The straight lines represent the EVPAs, and the color-coding represents the amount of polarization fraction. The color map for the brightness of the source is different to that for the EVPAs.

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