The Study of Variability of 8 Blazar Candidates Among the Fermi-LAT Unidentified Gamma-Ray Sources

Abstract

We discuss the time-series behavior of 8 extragalactic 3FGL sources away from the Galactic plane (i.e., | b |> 10◦ ) whose uncertainty ellipse contains a single X-ray and one radio source. The analysis was done using the standard Fermi ScienceTools, package of version v10r0p5. The results show that sources in the study sample display a slight indication of flux variability in γ-ray on monthly timescale. Furthermore, based on the object location on the variability index versus spectral index diagram, the positions of 4 objects in the sample were found to fall in the region of the already known BL Lac positions.