90 citations · 931 across the 88 of their papers we have counts for
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The nature of X-ray spectral variability in SWIFT J2127.4+5654
E. S. Kammoun, I. E. Papadakis
We study the flux-flux plots (FFPs) of the Seyfert galaxy SWIFT J2127.4+5654 which was observed simultaneously by XMM-Newton and NuSTAR. The 0.7-2 keV FFPs show a non-linear behavi…
Spectral and polarimetric signatures of X-ray eclipses in AGN
E. S. Kammoun, F. Marin, M. Dovciak +3
X-ray observations of active galactic nuclei (AGN) show variability on timescales ranging from a few hours up to a few days. Some of this variability may be associated with occulta…
Contribution of parsec-scale material onto the polarized X-ray spectrum of type-1 Seyfert galaxies
F. Marin, M. Dovciak, E. S. Kammoun
Type-1 radio-quiet active galactic nuclei (AGN) are seen from the polar direction and offer a direct view of their central X-ray engine. If most of X-ray photons have traveled from…
Testing the accuracy of reflection-based supermassive black hole spin measurements in AGN
E. S. Kammoun, E. Nardini, G. Risaliti
X-ray reflection is a very powerful method to assess the spin of supermassive black holes (SMBHs) in active galactic nuclei (AGN), yet this technique is not universally accepted. I…