PoWR grids of non-LTE model atmospheres for OB-type stars of various metallicitiesR. Hainich, V. Ramachandran, T. Shenar, A. A. C. Sander, H. Todt, D. Gruner, L. M. Oskinova and W.-R. HamannA&A, 621 (2019) A85DOI: https://doi.org/10.1051/0004-6361/201833787