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Fig. 2


Spectra of SiO 5−4 (red) and CO 2−1 (black), and their intensity ratios SiO 5−4/CO 2−1 (blue diamonds) at the position of the HV blue- (top) and redshifted (bottom) jet knots, B and R. The profiles are normalized to the CO peak intensity (normalization factor is labeled). Horizonthal and vertical dashed lines mark the baseline and the systemic velocity, Vsys = + 2.7 km s-1 and the vertical dotted lines the ±5 km s-1  interval where extended CO emission is filtered out.

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