indicates which lines to fit: 'ha' for Halpha, 'hb' for Hbeta, 'hg' for Hgamma, 'hd' for Hdelta, 'n2' for NII6548 and NII6583, 's2' for SII6716 and SII6731, 'o2' for OII, 'o3' for OIII4959 and OIII5007. The concatenation of several lines is possible to fit several lines.
suffixeout: string
suffixe for the output configartion file name
suffixe for the output configuration file name
commonw: bool
specifies if a common width has to be used for the various lines