Colour image: Haro 11 imaged with HST/NICMOS/NIC3 in the F160W filter (~H-band). Based on a 5 ks exposure obtained under a general observer programme 10902. North is up, east to the left. The scale is indicated with a solid white bar. The perturbed morphology is evident and demonstrates that the stellar mass distribution of Haro 11 is very asymmetric. Telltale merger features like sharp edges and tails are clearly visible. The apertures for the FLAMES/ARGUS and VIMOS/IFU spectra are indicated as grey semi-transparent rectangles. Greyscale image on the upper left: HST/ACS Hα image (Östlin et al. 2009) with the three knots , ℬ, and the chain-like structure, referred to as the ear, indicated. The positions and orientations of the two FORS2 slits are also marked.