  A new extended gamma-ray source (PS J1934.5+1845) was detected with a
significance of $\sim$13$\sigma$ at a location of 1$^{\circ}\!\!$.83 away from
the radio location of the Galactic supernova remnant 3C 400.2 using about 9
years of Fermi-LAT data. The 68% containment radius of PS J1934.5+1845's
extension was found to be 0$^{\circ}\!\!$.61 and PS J1934.5+1845 is showing a
power-law type spectrum with a spectral index of $\sim$2.38. In this
presentation we will summarize the gamma-ray analysis methods and report on the
analysis results related to the extension and spectrum of PS J1934.5+1845.
