Stereogram plots showing the offset between blue and red shifted emission of ³⁰SiO (left), CO (middle), and SO (right). North is up, west is right. The blue and red contours are constructed from 49% of the blue and red wings of the molecular lines, respectively. The black dashed contours are constructed using the remaining 2% of the velocity channels, centred on the v_lsr. Offset is measured with respect to the peak continuum brightness position. The contours in the top (bottom) panels are evenly spaced between 3 and 51 (15 and 51) times the rms noise value outside the line (~ 3.5 × 10⁻³ Jy beam⁻¹). The black contours in the bottom panels have been omitted.