Residual count map (left, smoothed with a Gaussian kernel of 0.2°) and residual TS map (right) obtained from 1 GeV to 3 TeV without G150.3+4.5 included in the model. The best-fit Gaussian and disk are represented in green and blue, respectively. The crosses are the centroid uncertainties (1σ), while the solid and dashed circles correspond to the r₆₈ with its associated statistical errors (1σ). The 4FGL sources are shown in white and the Urumqi 6 cm radio contours (at 6, 11, and 16 mK T_B) are overlaid in yellow.