%0 Journal Article %T Arithmetic of singular Enriques Surfaces %A Klaus Hulek %A Matthias Schuett %J Mathematics %D 2010 %I arXiv %X We study the arithmetic of Enriques surfaces whose universal covers are singular K3 surfaces. If a singular K3 surface X has discriminant d, then it has a model over the ring class field d. Our main theorem is that the same holds true for any Enriques quotient of X. It is based on a study on Neron-Severi groups of singular K3 surfaces. We also comment on Galois actions on divisors of Enriques surfaces. %U http://arxiv.org/abs/1002.1598v2