Fermi-LAT Observation of PSR B1259-63 during Its 2021 Periastron Passage

Zhi Chang, Shu Zhang, Yu-Peng Chen +3

PSR B1259-63 is a $\gamma$-ray binary system, where the compact object is a pulsar. The system has an orbital period of 1236.7 days and shows peculiar $\gamma$-ray flares (in 100\,MeV--300\,…