  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.

High Energy Astrophysical Phenomena