Line profiles of the (panel a) Brγ 2.166 μm and (panel b) Paβ 1.282 μm hydrogen-recombination lines. Both lines are continuum-subtracted and have been corrected to the cloud velocity and normalised to the 2013 peak flux densities. In (a), the ISAAC spectral data (epochs 2005 and 2013) have been smoothed to match the lower spectral resolution of the SINFONI data (epoch 2014). In (b), this was not necessary as only ISAAC data contained J band observations.