IMFIT modelling of FCC 211 to decompose the white-light image into a galaxy and a NSC component. Left: radial profile of the data (solid black line), galaxy model (dashed blue line), NSC model (dotted orange line), and combined model (dash-dotted red line). The grey areas show the extraction regions. The mean fluxes in these regions are indicated by the horizontal dashed magenta lines to illustrate the scaling factor α. Right: 2D cutout images of the original image (bottom left), NSC and galaxy model (top row), and resulting residual image (bottom right). As described in the text, this decomposition is used to determine the contribution of galaxy light when extracting the NSC spectrum from the MUSE data. Each image shows a region of 60″ × 60″ (5.4 kpc × 5.4 kpc) centred on the NSC.