Title: Multi-wavelength Time Domain Astronomy: To Probe the Environs of Central Super Massive
           Black Hole of Blazars 

　　Speaker: Alok C. Gupta (ARIES/SHAO)  

　　Time: 3 PM, Mar. 23th (Thursday)    

　　Location: Lecture Hall, 3rd floor    

　　Abstract:  

　　This is the age of multi-wavelenth time domain astronomy in which the transient astronomical sources are of great interest due to their rapid change in flux and polarization. Simultaneous multi-wavelength observation of a particular transient source on an extended period of time has importance to understand the emission mechanism in different electromagnetic bands. Blazars are among one of the most favorite astronomical transient objects, because they emit radiation in the complete electromagnetic spectrum, and their flux and polarization are highly variable. 

　　In the present talk, I will summarize our recent results based on multi-wavelength observations taken with space and ground based telescopes.  The scientific projects involve are: multi-wavelength flux, polarization and cross-correlated variability of blazars on diverse timescales, and optical and X-ray QPOs in blazars.