Locations of the candidate YSOs in the GeMS/GSAOI K_s-band image, compared with the intensity of 8 μm emission from Spitzer observations (green contours, Jones et al. 2005); north is up and east is left. The blue circles show YSO candidates from analysis of the colour−colour diagram, red circles are those from analysis of the colour−magnitude diagram, see text for details. The left-hand panel shows the region around the central cluster (indicated by the white circle), with the yellow arc showing the location of an apparently limb-brightended rim; the right-hand panel shows the region around the C5 compact clump.