Notes. The first column is the label used for each spectral region (which might include more than one spectral line). In the other columns, Δλ is the pixel size in mÅ; n_λ is the number of wavelengths used for that spectral line; λ₀ is the central wavelength for the electronic transition associated with the spectral line; e_low and e_upp are the electronic configurations of the lower and upper energy level, respectively; E_low is the excitation potential (in eV) of the lower energy level; and α and are the velocity exponent and collision cross section parameters, respectively, as defined in Anstee, Barklem, and O’Mara collision theory for the broadening of metallic lines by neutral hydrogen collisions (Anstee & O’Mara 1995; Barklem 1998).