Fig. B.1
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Sketch of the jet model. The x- and y-axes lie in the plane of the sky, and the ɀ-axis is parallel to the line of sight. The y-axis coincides with the projection of the jet axis on the plane of the sky. The dotted line labelled ‘l.o.s.’ denotes a generic line of sight. The star powering the jet lies at the origin of the coordinate system.
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