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Fig. E.1.

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BU-VLBA image of the jet at 86 GHz observed in April 2021. The beam is shown at bottom-left: 0.27 mas × 0.11 mas at −5.5°. The contours increase by a factor of 2 from 1.6 % to 51.2 % of the I-peak that is around ∼1.8 Jy.
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