A New Gamma-Ray Source in the Vicinity of the Galactic Supernova Remnant G306.3$-$0.9

A new extended gamma-ray source, which was named as Source A, in the southwest of Galactic supernova remnant (SNR) G306.3$-$0.9 was detected with a significance of $\sim$13$\sigma$ at the location of R.A. (J2000) = 13${}^{\mathrm{h}}$ 17${}^{\mathrm{m}}$ 52${}^{\mathrm{s}\text{\hspace{0.17em}⁣}\text{\hspace{0.17em}⁣}}$.80, Decl. (J2000) = $-$63${}^{\circ }$ 55${}^{\mathrm{\prime }}$ 48$\mathrm{"}\text{\hspace{0.17em}⁣}\text{\hspace{0.17em}⁣}$.00 using about 9 years of Fermi-LAT data. In order to investigate this unidentified gamma-ray source in multi-wavelengths, we performed Swift observations of Source A. In this presentation we summarize the published gamma-ray results, report about the recent ToO Swift observations of Source A, and show our preliminary results of the gamma-ray analysis that we conducted using the new X-ray data.