The Study of Variability of 8 Blazar Candidates Among the \textit{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., $\mid b\mid \ge 10^{\circ }$) whose uncertainty ellipse contains a single X-ray and one radio source. The analysis was done using the standard Fermi \textit{ScienceTools}, package of version v10r0p5. The results show that sources in the study sample display a slight indication of flux variability in $\gamma$-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.

Submitted to conference proceedings for IAU 356 symposium: Nuclear Activity in Galaxies Across Cosmic Time (editors: M. Povic, J.Masegosa, H. Netzer, P. Marziani, P. Shastri, S.B. Tessema \& S. H. Negu)

References in corpus (3)

• The Third Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
• Fermi's Sibyl: Mining the gamma-ray sky for dark matter subhaloes
• Optical spectroscopic survey of a sample of Unidentified Fermi objects