Optical identification of the companion to PSR J 1911 − 5958 A , the pulsar binary in the outskirts of NGC 6752

We report on the identification of the optical counterpart of the binary millisecond pulsar PSR J1911−5958A, located in the outskirts of the globular cluster NGC 6752. At the position of the pulsar we find an object with V = 22.08, B − V = 0.38, U − B = −0.49. The object is blue with respect to the cluster main sequence by 0.8 magnitudes in B − V. We argue that the object is the white dwarf companion of the pulsar. Comparison with white dwarf cooling models shows that this magnitude and colors are consistent with a low-mass white dwarf at the distance of NGC 6752. If associated with NGC 6752, the white dwarf is relatively young, < ∼ 2 Gyr, which sets constraints on the formation of the binary and its ejection from the core of the globular cluster.