Description
The narrow line Seyfert 1 galaxy IRAS 13224-3809 exhibits rapid, high amplitude X-ray variability. This provides an excellent opportunity to study how the changing flux state affects the energy spectra of AGN and to conduct reverberation mapping of the inner accretion disc. Using archival XMM-Newton data and custom reduction script we split the observations into three distinct flux states with equal counts producing spectra of the AGN in high, mid, and low states. The spectra are modelled using the SpectralFitting.jl fitting package with the strong relativistic effects calculated by the Gradus.jl ray tracer. The absorption is known to be variable with a highly blue-shifted Fe XXV or Fe XXVI absorption feature appearing in the low flux state around 8.5 keV. This highly blue-shifted feature could be due to an ultrafast outflow or more local ionised absorption in a disc atmosphere. We use Gradus.jl to explore radiative transfer through different disc and corona geometries near the black hole and present our preliminary results for disc absorption models.
