Refined spatial distribution of γ-ray emission across the remnant’s extension and multiwavelength picture. Left panel: 4° ×4° Fermi-LAT TS map > 1 GeV. The image, of 90″ pixels, is convolved with a σ = 1.5′ Gaussian. The thick magenta circle represents the 68% containment PSF size, derived at the 1 GeV energy threshold used for the construction of the TS map. The black and white contours represent the location of CO clouds (CO Galactic Plane survey data; Dame et al. 2001) likely interacting with the SNR. Right panel: Combined CGPS data at 1.42 GHz (red), 0.5–1.0 keV eRASS:4 data (green), and Fermi-LAT data > 1 GeV (blue) from the location of the remnant.