High energy $\gamma$-ray emission from PSR B1259$-$63 during 2014 and 2010 periastron passages

G. Andrea Caliandro, C. C. Teddy Cheung, Jian Li +2

PSR B1259$-$63/SS 2883 is a $\gamma$-ray binary system composed of a radio pulsar in a long (1236.7 days) and elliptical ($e\sim 0.87$) orbit around a Be star. In its 2010 periastron pas…