First results from a study of DIBs with thousands of high-quality
  massive-star spectra
  We are using five different surveys to compile the largest sample of diffuse
interstellar band (DIB) measurements ever collected. GOSSS is obtaining
intermediate-resolution blue-violet spectroscopy of ~2500 OB stars, of which
60% have already been observed and processed. The other four surveys have
already collected multi-epoch high-resolution optical spectroscopy of 700 OB
stars with different telescopes, including the 9 m Hobby-Eberly Telescope in
McDonald Observatory. Some of our stars are highly-extinguished targets for
which no good-quality optical spectra have ever been published. For all of the
targets in our sample we have obtained accurate spectral types, measured
non-DIB ISM lines, and compiled information from the literature to calculate
the extinction. Here we present the first results of the project, the
properties of twenty DIBs in the 4100-5500 {\AA} range. We clearly detect a
couple of previously elusive DIBs at 4170 {\AA} and 4591 {\AA}; the latter
could have coronene and ovalene cations as carriers.
