W(5780) vs. N(H I ). The data for the composite spectrum as listed in Table 1 (red star) overlaid to corresponding data for the Milky Way as published in Welty et al. (2006), Friedman et al. (2011) and Welty & Hobbs (2001; as scatter plot in black). Measurement uncertainties of those data vary between 3 mÅ  and 20 mÅ  for DIB 5780 and are omitted here for clarity. For our measurement the statistical error is about 1−2 mÅ  and lies within a fraction of the star symbol.