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Published online by Cambridge University Press: 19 July 2016
The identification of the optical counterpart of the M 15 (NGC 7078) X-ray source has been confirmed photometrically and spectro-scopically (Aurière et al. 1984, 1985, 1986; Ilovaisky and Chevalier: 1985; Charles et al. 1985, 1986). It is designated M15:AC211 from the Aurière and Cordoni catalogue (1981).