Perseus cluster sky maps for an energy threshold of 250 GeV (left-hand panels) and 1 TeV (right-hand panels) obtained from 253 h of MAGIC observation. Upper panels show the relative flux (colour code, expressed in signal-to-background ratio) and the excess significance (contour lines starting from 4σ with steps of 2σ). Lower panels show the significance maps where the signal from IC 310 is subtracted (see text). Symbols indicate the positions of the three brightest radio galaxies of the cluster.