Illustrations of the DIB equivalent width measurements. The top (bottom) graphs show the spectra before (after) normalization, i.e., division by the fitted continuum. The hatched areas correspond to the measured equivalent widths. (Left) A typical continuum fitting and EW extraction of the 5780 Å DIB. (Middle) Example of removing contaminating stellar lines for the late-B target stars. (Right) Example of telluric line removal by means of a synthetic transmission for the 6284 Å DIB and the subsequent EW measurement.