Unlike gamma ray emitting radio pulsars which shine on their own, there are a large number of galactic neutron stars and black holes which owe their gamma-ray light to the effect of a companion star.

• 与释放出v射线辐射的脉冲星自己闪烁不同，很多极大的中于星和黑洞受其伴星的影响，也释放出Y射线。