Histogram of the FeKα width. The bulk of the detections are grouped showing σ_line< 0.15 keV. We define them as narrow FeKα. The rest are defined as broad Fe features. Even though we have detected 60 narrow FeKα, this plot only includes 38. The reason is that 22 of them are very narrow (or the signal-to-noise very low) and they have been treated in the fits as delta functions. (In Table A.3 we present their width as σ_line = 0.)