Average spectra extracted from regions SNR 1, SNR 2, and region 4 in Fig. 6 showing the spectral bands in the ranges 4850–5300 Å (left) and 6800–7500 Å (right). The thin vertical lines show the expected transitions at the redshift of NGC 1313 based on the line catalogue from Fesen & Hurford (1996). The spectra have been smoothed with a Gaussian kernel of 2.5 Å. Small gaps mask some pixels having negative values due to low S/N.