Relations between the Spectral Indices and Flux Densities of Eight Blazars

Figure 1

The averaged flux densities and spectral variances of the 8 sources, i.e., 0235+164, 0430+052, 1156+295, 1308+326, 1413+135, 1641+399 (3C 345), 1749+096, and 2251+158 (3C 454.3) as a function of time measured in JD. The averaged flux densities are shown in the upper panels and the spectral variances are shown in the lower panels, in which the filled circles stand for 4.8 GHz, the crosses stand for 8 GHz, and the open circles stand for 14.5 GHz.