PWN is already included in the model. The fit localizes the position near the center of the SNR at RA$_{\rm{J2000}}$ = $238.169^\circ$ $\pm$ $0.013^\circ$ and Dec$_{\rm{J2000}}$ = $-56.133^\circ$ $\pm$ $0.014^\circ$ with a radius $r$ = $0.295^\circ$ $\pm$ $0.013^\circ$, similar to the radio extension of the SNR ($0.31^\circ$). The significance of the extension is 5.8$\sigma$ (TS$_{\rm ext}$= 33.4), calculated with the TS value of the model including the point source and the radio PWN (reported in Table \[tab:LL\]). This rules out the hypothesis of a point-like source being responsible for the additional emission such as an active galactic nucleus behind the SNR.

We further use the radio observations to derive two other templates for the SNR. First, we use the radio map replacing the contribution of the nebula by the average value of the radio emission around it (labeled “radio SNR”; see Figure \[fig:Templates\], center). From that, we also create another template, following the radio shock and filled homogeneously (called here “SNR mask”; see Figure \[fig:Templates\], right).

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Values from the fit & Disk only & radio PWN & Disk & radio PWN & SNR mask\

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$\Phi$ (ph cm$^{-2}$ s$^{-1}$) $\times$ $10^{-8}$ & 2.70 $\pm$ 0.15 & 0.23 $\pm$ 