Fig. 7.
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Simultaneous fit to the sine and cosine of the average position angle, θ, of the identified VLBI jet features as a function of their computed time of ejection. Most of the points lie within the 3σ model uncertainty region. The simultaneous fit avoids the ±180 uncertainty in the position angle. The corresponding plot for the position angle, θ, can be found in Fig. 8.
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