Speaker
Description
We have analyzed data from the flat-spectrum radio quasars PKS 1510-089 collected over a period of eight years from 2008 August to 2016 December with the Fermi-LAT. We have identified several flares of this highly variable source, studied their temporal and spectral properties in detail, and compared with previous works on flares of PKS 1510-089. Five major flares and few sub-flares have been identified in our study. The fastest variability time is found to be 1.30$\pm$0.18 hr and the minimum size of the emission region is found to be 4.85$\times$10$^{15}$ cm. In most of the flares, the spectral energy distribution are better fitted with a log-parabolic distribution compared to a simple power law or a power law with exponential cutoffs. This has strong physics implications regarding the nature of the high-energy gamma-ray emission region.
