Absorption line spectra in the line of sight to α Leo. Black histogram-style curves represent the observations, red solid lines are the best fits, green lines show the contributions from the two individual components that we could identify, and blue lines represent our reconstructions of the profiles before convolution with the instrumental LSF, i.e. the intrinsic interstellar profile. Stellar continua are shown in cyan. All fits have been performed simultaneously with the model for the line of sight with 2 components having same velocity, same temperature, and same turbulent broadening for all species. Copernicus spectra are labeled “Copernicus”, their flux scale is expressed in counts per 14 s; the remaining spectra are from HST/STIS and are indicated in the units 10^-9 erg cm^-2 s^-1 Å^-1.