Double coverings of octic arrangements with isolated singularities

In this paper we construct 206 examples of Calabi-Yau manifolds with different Euler numbers. All constructed examples are smooth models of double coverings of P 3 branched along an octic surface. We allow 11 types of (not necessary isolated) singularities in the branch locus. Thus we broaden the class of examples studied in [7]. For every considered example we compute the Euler number and give a precise description of a resolution of singularities.