General Seminar

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General Seminar takes place every Monday at 11.15 in Piwnice, radioastronomy seminar room.
Remote participation via the BigBlueButton (BBB).

3 February 2025

“Exploring blazar flares with threshold autoregressive models and spectral energy distribution modeling”

mgr Klaudia Kowalczyk (Institute of Astronomy, Nicolaus Copernicus University)

Abstract:
Blazars are a unique class of active galactic nuclei (AGNs) hosting relativistic jets pointing almost directly at the observer. They are known to be highly variable sources in all energy bands, from radio waves to very high-energy gamma rays, where they exhibit powerful flares. Their variability is assumed to originate in the jet. By modeling blazars’ spectral energy distribution (SED), we can study the innermost non-visible parts of blazars. I will present a novel method of differentiating quiescent states from flares in blazar gamma-ray light curves using the self-exciting threshold autoregressive (SETAR) model. I will also show the preliminary results of modeling blazar SEDs and linking the obtained physical parameters to different states of blazars.