Stacked 2012–13 spectrum with best fit continuum and absorption model, two collisional emission models and three photoionised emission models, all using solar abundances. C-statistic = 1756. The data are shown in black, the total model in red and the absorbed powerlaw component in pink. The collisional emission components are combined and shown in green. The photoionised emission phases are combined and shown in blue. The data are binned by two for display purposes. For details see text.