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Fig. 1.

image

Orientation of the Stokes vector components of Eq. (1), where the beam propagates out of the sketch, toward the observer. When the vertical axis (+Q) is aligned with a preferred orientation (usually the meridian on-sky), the remaining Stokes vector components are oriented accordingly. The AoLP (Eq. (4)) is also measured with respect to the +Q direction in counterclockwise direction.

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