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Bulk Comptonization: new hints from the luminous blazar 4C+25.05
E. S. Kammoun, E. Nardini, G. Risaliti +3
Blazars are often characterized by a spectral break at soft X-rays, whose origin is still debated. While most sources show a flattening, some exhibit a blackbody-like soft excess w…
Spatially resolved Fe K spectroscopy of NGC 4945
Andrea Marinucci, Stefano Bianchi, Giuseppina Fabbiano +4
We present the imaging and spectroscopic analysis of the combined Chandra ACIS-S observations of the Compton-thick Seyfert 2 galaxy NGC 4945. We performed a spatially-resolved spec…
Disentangling the Complex Broadband X-ray Spectrum of IRAS 13197-1627 with NuSTAR, XMM-Newton and Suzaku
D. J. Walton, M. Brightman, G. Risaliti +8
We present results from a coordinated -+ observation of the type 1.8 Seyfert galaxy IRAS 13197-1627. This is a highly complex source, with strong contributions…
Quasars as standard candles I: The physical relation between disc and coronal emission
E. Lusso, G. Risaliti
A tight non-linear relation exists between the X-ray and UV emission in quasars (i.e. ), with a dispersion of 0.2~dex over 3~orders of ma…