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Fig. 5


Positions of the knots along the HH 158 jet as a function of time. The filled circles indicate the observed optical positions, while the open circles and the stars indicate the observed radio and X-ray knot positions, respectively. The four straight lines represent the least-squares fit described in Sect. 3 (the four lines corresponding to the values n = 0, 1, 2 and 3, from left to right).

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