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Fig. 3
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Azimuthal profile of the deprojected Qϕ image, radially averaged over a ring of 0.22–0.29″ (~27–36 au). The two peaks at around 50° and 210° correspond to the launch locations of the two spiral arms. The error is taken to be 2σ. The dashed line indicates the location of the disk’s semi-major-axis.
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