Multi-wavelength Variability in Blazars

Blazars are very well known for flux variations over complete energy spectrum ranging from radio to very high energy gamma-rays (TeV). However, the physical processes behind these extreme energetics and variability are still not very well established. The blazar emission, supposedly originated from very close interiors of the central engine, provides a unique opportunity to understand the physics at work. The violent activities in the jets are directly manifested in the form of flux variations. The flux variability in blazars observed over different frequencies, quasi-simultaneously, can be used to understand the physical processes responsible. As a part of blazar monitoring program at PRL, a sample of bright blazars are regularly monitored using observational facilities at Mt. Abu Infrared Observatory. The temporal and spectral variability are used as a tool to constrain the existing emission models. Here, in this seminar I will be presenting few interesting results obtained out of the studies performed during last couple of years at PRL.