Significance maps with best-fit models. We used an oversampling radius of 0.07° for smoothing. Significance values were obtained using the ‘Cash’ statistic (Cash 1979; see also Appendix A). Circle markers and coloured dashed lines display the best-fit position and 1-σ extent of the Gaussian model components, respectively. (a) Pre-modelling significance map, with best-fit model components of the 1-component model and the 2-component model indicated. (b) Residual significance map for the 1-component model. (c) Residual significance map for the 2-component model. In all panels, the grey dashed line marks the Galactic plane, white dashed circles show regions excluded from the analysis, and the black triangle marker denotes the position of PSR J1809−1917.