Variability of active galaxies. I.

Accreting supermassive black holes at the centres of galaxies are the engine of active galactic nuclei (AGN). X-ray light curves of unabsorbed AGN show dramatic random...位于星系中心的吸积超大质量黑洞（accreting supermassive black holes）是活动星系核（active galactic nuclei, AGN）的驱动引擎。未被吸收的活动星系核的X射线光变曲线呈现出剧烈的随机……