The Statistical Study of the Daily Fermi Light Curves of 130 Sources

Abstract

Abstract:Blazars show rapid and high amplitude variability. It is interesting to question what kind of process the variability corresponds to. Maybe it is a result of the instability of the accretion flows. In this work, Fermi daily light curves of 130 sources are analyzed, and the distributions of daily variability are compared by using a Kolmogorov-Smirnov (K-S) test. The results can be summarized as follows: (1) in most cases, the distributions are not Gaussian; (2) some pairs of the distributions are similar.