Fit of the Hα profile of ASASSN-14li at +14 days with a single Gaussian (top left), a single Lorentzian (top right), a double Gaussian (bottom left) and a double Lorentzian (bottom right). Although a double Lorentzian (broad and narrow profile) provides the best fit, a single Lorentzian and a double Gaussian also capture well the line profile (while a single Gaussian results in a worse fit, particularly at the blue wing) and yield comparable results for the line luminosity. For simplicity, in our sample comparative analysis we use the single Lorentzian fit for ASSASN-14li.