High Energy Physics Seminars

Multi-waveband study of Blazars

by Mr. Arkadipta Sarkar (DHEP, TIFR)

Monday, May 7, 2018 from to (Asia/Kolkata)
at TIFR, Mumbai ( D-406 )
Description
Blazars are a subclass of Active Galactic Nuclei (AGN) with their relativistic jets oriented close to our line of sight. They are highly energetic and some of the most variable extragalactic sources. Variability in Blazars come in two flavors; sudden random increase in the flux which is termed flares and flux variations which have a period associated with them, the Quasi Periodic Oscillations (QPO). We analyze the multiwaveband characteristic of Blazars using a couple of different sources like 3C 454.3 and Mkn 421 to understand the mechanism of the Blazar emissions.  We perform long-term timing and variability studies on 3C 454.3 in optical, IR and Radio bands and short term/ intra-day variability analysis of Mkn 421 in X-ray band during the January 2018 flare. We also look into some of the available QPO detection techniques.