Understanding Blazars : A case study of 1ES 1959+650 and Ton 599

We have carried out spectral and temporal studies for nearby TeV Blazar 1ES1959+650
(z=0.047) using multi waveband data collected over the period of two years. The study of correlated variability across various wavebands from radio to gamma rays shows that 0.3-8 keV X-ray and 3-300 GeV gamma rays are highly correlated during 
aring period. The multi waveband spectral energy distributions (SED) were generated for various states of a are observed during June-July 2016. It was observed that single zone synchrotron self Compton (SSC) model is not adequate to reproduce broadband emission from the source. Further the nature of ux vs powerlaw index plot of 0.1-3 GeV and 3-300 GeV gamma rays also suggests the dierent emission regions of these two energy bands. We made an attempt to explain broadband SEDs using two zone
SSC model in which resultant emission from the source is sum of the emission from
two co-moving blobs in the jet. Results of this two zone SSC modeling of SEDs will
be discussed. Some recent work on long-term study of gamma-ray lightcurve of Ton
599 will also be discussed.