Composite spectral energy distribution of the typical main sequence galaxy (left; IR8 = 4  ±  2, see Eq. (5)) and starburst (right; IR8  >  8, i.e., above 2σ). Light grey dots: individual GOODS–Herschel galaxies normalized to . The large filled symbols with error bars are the median and associated uncertainty of the MS (left figure, blue dots) and SB (right figure, red dots) galaxies computed in intervals of wavelengths defined to contain a fixed number of 25  ±  5 galaxies. The uncertainty on the median values is derived from the 16th and 84th percentiles around the median divided by the square root of the number of galaxies. The model fit to each SED is shown with a solid black line while the opposing SED (MS or SB) is shown with a dotted black line for comparison.