Left: separation of knots K16 (red/brown circles at 7 mm/3 mm, respectively) from the core A0 (black dotted line) according to the 43 GHz and 86 GHz maps; the red lines approximate the motion of K16; dotted yellow and blue lines show the average positions of A1 (yellow/gray triangles at 7 mm/3 mm) and A2 (cyan/black triangles at 7 mm/3 mm); the red line segment at the position of A0 indicates the 1σ uncertainty of the ejection time of K16. Right: light curves of the core A0 (black), A1 (yellow), A2 (cyan), K15 (blue), K16 (red), the sum of all components (magenta) at 43 GHz, and from the entire source at 37 GHz (gray). The red vertical line indicates the ejection time (and its 1σ uncertainty) of K16 from A0. In both panels, the black vertical line marks the VHE γ-ray flare.
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