Energy-dependent morphology of the γ Cygni SNR. Upper left: Fermi-LAT count map between 15 and 60 GeV smoothed with a Gaussian kernel (σ = 0°.75) and 3 σ and 5 σ contours of a point source search. The white line is the 400 K contour of the 408 MHz observation by the CGPS. The white diamond identifies the position of PSR 2021+4026. Upper right: same as upper left, but in the range from 60 to 250 GeV. Lower left: Relative flux map observed by MAGIC at 250–500 GeV together with 3 σ and 5 σ point source significance contours. The same radio contours as in upper panels are displayed in cyan. Lower right: same as lower left, but in the energy range from 500 GeV to 2.5 TeV.