Adaptive optics assisted K_s band image showing zoom-in of the central region of S255IR and featuring NIRS3. The image was normalised to the peak intensity from NIRS3 (labelled NIRS3 LBT) and scaled logarithmically, as shown in the colour bar above the panel. Blue contours represent ALMA band 3 continuum emission with the contour levels [0.5, 1.0, 2.0, 4.0, 5.0, 10.0] ×10⁻³ Jy beam⁻¹ (Cesaroni et al., in prep.). White contours show VLA 1.3 cm emission with the contour levels [0.8,2.0,5.0,10.0,13.2] ×10⁻³ Jy beam⁻¹ from Cesaroni et al. (2018). Black circles represent the peak position for NIRS3 and the NE knot for LBT, ALMA, and VLA, as labelled.