We suggest the bright stars X Per and HD 77581 as possible candidates for the X-ray sources 2U 0352+30 and 2U 0900-40, respectively. The first is an active, rapidly rotating Be star which is losing mass. The second is similar to BD+ , a likely candidate for Cyg X-1, in spectral type and in the possibility that it may be a short-period binary.
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Brucato et al. (1972) studied this question.