Beijing Astronomical Observatory, Chinese Academy of Sciences, Beijing 100080, China;
Department of Physics, Yunnan Normal University, Kunming 650092, China;
Beijing Astronomical Observatory, Chinese Academy of Sciences, Beijing 100080, China;
Yunnan Observatory, Chinese Academy of Sciences, Kunming 650091, China;
Department of Physics, the University of Hong Kong, Hong Kong, China;
Department of Physics, the University of Hong Kong, Hong Kong, China;
BL Lacertae objects; general-γ-rays; general-X-rays; nonthermal;