Left panel: K-band photometric image of the NGC 3521, as observed by VIKING. The small circle indicates the bulge radius as assessed by the Sérsic fit, the ellipse illustrates the widest point in the SBP, roughly outlining the galaxy’s size, and the square represents MUSE’s field of view (FoV). Right panel: Derived SBP with a blue line indicating the best-fitting Sérsic model to the central luminosity excess. The vertical dashed line represents the bulge radius as determined by the Sérsic fit. Derived bulge-to-total is displayed above the left panel.