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RE J1034+396: The origin of the soft X-ray excess and QPO
Matthew Middleton, Chris Done, Martin Ward +2
The X-ray quasi-periodic oscillation (QPO) seen in RE J1034+396 is so far unique amongst AGN. Here we look at the another unique feature of RE J1034+396, namely its huge soft X-ray…
A ~1-hour X-ray periodicity in an active galaxy RE J1034+396
Marek Gierlinski, Matthew Middleton, Martin Ward +1
Active galactic nuclei and quasars are thought to be scaled up versions of Galactic black hole binaries, powered by accretion onto supermassive black holes with masses of 10^6-10^9…
High Energy spectra of Seyferts and Unification schemes
Matthew Middleton, Chris Done, Nick Schurch
The Unified Model of AGN predicts the sole difference between Seyfert 1 and Seyfert 2 nuclei is the viewing angle with respect to an obscuring structure around the nucleus. High en…
An absorption origin for the soft excess in Seyfert 1 AGN
M. J. Middleton, C. Done, M. Gierlinski
(abridged) The soft excess seen in the X-ray spectra of many high mass accretion rate AGN can be well modelled by reflection from a partially ionised accretion disc. However, the d…
Black hole spin in GRS 1915+105
Matthew Middleton, Chris Done, Marek Gierlinski +1
Microquasars are galactic black hole binary systems with radio jets which can sometimes be spatially resolved to show superluminal motion. The first and best known of this class of…