Map of the number density distribution of GC candidates. It was produced by modelling each GC candidate as a single pixel with unity flux and then smoothed with a Gaussian kernel of σ = 50″. The colour scheme therefore represents the GC number density. We masked bright stars, diffraction spike residuals, the emission line nebula, and the high- velocity system of NGC 1275, as well as large cluster galaxies (except for the NGC 1275 and its nearby companion in the west, NGC 1272). Iso-density contours with a semi-major axis of a = 50 kpc (black) and 320 kpc (white) are shown for the GC candidates.