model. \[fig:TSmap\_all\_sky\]](TSmap_ALL_Sky_40pix.png)

Morphological analysis\[sec:Morphological\_analysis\]
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### Extension\[sec:Extension\]

The 3FGL catalog compiled by the $\textit{Fermi}$-LAT collaboration [@3FGL] has two point-like sources tentatively associated with the SNR, which we remove for our analysis. Since the creation of the first SNR catalog [@First_SNRcat:2016], G326.3$-$1.8 has been known to show extended $\gamma$-ray emission, and its radius has been determined to be $0.21^\circ$ using an extended uniform disk model, somewhat smaller than the $0.31^\circ$ radius of the radio shell but larger than the radio PWN. However, that analysis was based on only three years of data and made use of the former Pass 7 data release.

With the latest Pass 8 data and using the PSF3 event type, we revisit the morphology of this SNR to understand the nature of the $\gamma$-ray emission. We start by finding the best position of a point source, modeling its emission as a power law and using the `pointlike` framework [@Kerr:2010] from 300 MeV to 300 GeV. Then, we investigate the extension of the $\gamma$-ray emission using a 2D-symmetric Gaussian and a disk with a uniform brightness. Table \[tab:Fit\_Pointlike\] shows the respective best-fit position and extension – if extended – for the different spatial models. The significance of a 