Modeling Blazar Power Spectra

Ben Groebe, Department of Physics, Washington University
January 26, 2018 at 4:00 pm
204 Crow
Event Description 

Blazars are an extreme subclass of the supermassive black holes found at the center of galaxies. They are responsible for nearly all of the extragalactic gamma ray background, and show characteristically rapid variability in their flux across all observed energies. The FERMI-LAT telescope has taken eight years of high-quality gamma ray data for a large portion of the sky. For three blazars, a maximum likelihood fit is performed to model the power spectra and identify characteristic timescales associated with physical properties and processes of the system. Bayesian hypothesis testing is used to confirm the significance of the observed timescales.