TS map for events with energies above 2 GeV showing the emission from G107.7−5.1. The circle represents the uniform disk obtained in this work to model the morphology of the gamma-ray emission. The contours show the optical emission of the SNR shell taken from Fesen et al. (2024). The marks + and × indicate the center locations of the disk and the extended 4FGL source, respectively, while the boxes show the locations of the other 4FGL-DR4 sources in the region.