Author(s)

Zhou Li, Xu Guangyang, Wang Lisa, Chen Jiufu, Li Xiaopan

Corresponding Author

Zhou Li

Abstract

On the basis of introducing the flare variants, flat-spectrum radio quasars and SMARTS projects, this paper briefly analyses the historic light-change curves and color-index-change curves of a typical flat-spectrum radio quasar PKS 2142-75 in each band. The results show that the target's photodynamic activity is intense, and there is not much correlation between color index and brightness. The paper makes a statistical analysis of the long-term color change of the flat-spectrum radio quasar in the SMARTS source. The results show that only a few sources show color changes, which indicates that the light spectrum of the flat-spectrum radio quasar is very complicated.

Keywords

Photochromism, Change of Color Index, Relevance