Revised the $\gamma$-ray emission from SNR CTB 109 with Fermi-LAT

Yuliang Xin, Qizhen Zhao, Xiaolei Guo

CTB 109 is a middle-aged shell-type SNR with bright thermal X-ray emission. We reanalyze the GeV $\gamma$-ray emission from CTB 109 using thirteen years of Pass 8 data recorded by the F…