16-27 August 2021
America/Los_Angeles timezone

Study of variability in radiation from the Blazar source 3C454.3

Not scheduled
ZOOM videoconf (SLAC)

ZOOM videoconf



Kaustav Dipta Goswami (Tezpur University)


Blazars are the most promising sources of high energy emission in the known universe. They are a subclass of Active Galactic Nuclei (AGN) where the emission originates from a relativistic jet aligned at or close to the line of sight. Their broad band spectrum is predominantly non-thermal, extending from radio to gamma-ray energies. Blazars show very high flux variability across the electromagnetic spectrum. Here, we present a study of the long-term variability in radiation from the FSRQ 3C454.3 by constructing flux distributions using 10-year simultaneous optical and gamma ray observations from SPOL and Fermi-LAT, respectively. Also, we study flux distribution using X-ray data from AstroSat. We perform investigations of the temporal and spectral variability. As for the temporal analysis, we construct light-curves with the data from all the three bands. Further, we construct the Spectral Energy Distribution (SED) using X-ray data (LAXPC and SXT) and fit the SED with various models viz. power-law, log-parabola and broken power-law.

Primary author

Kaustav Dipta Goswami (Tezpur University)


Rukaiya Khatoon (Tezpur University) Dr Rupjyoti Gogoi (Tezpur University)

Presentation Materials