Spectro-images showing the Th 28 jet emission in selected emission lines, with contours starting at 3-σ of the background noise (at an average flux of 16 × 10⁻²⁰ erg s⁻¹ cm⁻² Å⁻¹) and increasing as factors of . Left: the High-velocity blue-shifted emission (−200 to −90 km s⁻¹). Centre: the low-velocity emission (−90 to +90 km s⁻¹). Right: the High-velocity red-shifted emission (+90 to +200 km s⁻¹).