Observations of MCG-5-23-16 with Suzaku, XMM-Newton and NuSTAR: Disk   tomography and Compton hump reverberation
  MCG-5-23-16 is one of the first AGN where relativistic reverberation in the iron K line originating in the vicinity of the supermassive black hole was found, based on a short XMM-Newton observation. In this work, we present the results from long X-ray observations using Suzaku, XMM-Newton and NuSTAR designed to map the emission region using X-ray reverberation. A relativistic iron line is detected in the lag spectra on three different time-scales, allowing the emission from different regions around the black hole to be separated. Using NuSTAR coverage of energies above 10 keV reveals a lag between these energies and the primary continuum, which is detected for the first time in an AGN. This lag is a result of the Compton reflection hump responding to changes in the primary source in a manner similar to the response of the relativistic iron K line. 
A. Zoghbi, E. M. Cackett, C. Reynolds, E. Kara, F. A. Harrison, A. C.   Fabian, A. Lohfink, G. Matt, M. Balokovic, S. E. Bog...
astro-ph.HE