at kpc scales [@matt1994; @iwasawa2003; @beckmann2004; @bianchi2006]. No Compton reflection hump has been detected with [[*NuSTAR*]{}]{} [@kamraj2017] despite the presence of a strong [Fe K$\alpha$]{} emission line, that likely originates from Compton-thin material [@kamraj2017]. Past results indicate the presence of a high-energy cut-off at $\sim 200$ keV, albeit with some uncertainties (see Table \[tab:past\]). From [[*INTEGRAL*]{}]{} data taken in 2003 in combination with [[*XMM–Newton*]{}]{} spectra, [@beckmann2004] reported a lower limit of 180 keV to the high-energy cut-off. The same result is obtained by [@derosa2012], also from [[*INTEGRAL*]{}]{}+[[*XMM–Newton*]{}]{} data. Using high-energy [[*INTEGRAL*]{}]{} and BAT data, [@molina2013] report a high-energy cut-off of [$202^{+ 111}_{- 54}$]{} keV. From [[*INTEGRAL*]{}]{} data taken from 2003 to 2009, [@fedorova2011] report strong variations in both the flux and spectral slope in the 20–60 keV band on a few months time-scale. These authors also report a high-energy cut-off at $\sim 200$ keV with some indications of variability between 80–100 keV and [$> 320$]{} keV, but with limited statistics. From [[*INTEGRAL*]{}]{} data taken from 2003 to 2010, [@lubinski2016] report a temperature of [$53^{+ 17}_{- 9}$]{} keV and an optical depth of [$2.7^{+ 0.6}_{- 0.9}$]{}. However, no constraint on the cut-off has been found with [[*NuSTAR*]{}]{} [@kamraj2017] and only a 