Properties of X-ray sources in M31/M33
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https://b2find.eudat.eu/dataset/2bacf828-9a19-5aeb-b321-c37c98ba4aa2
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We have obtained optical spectra for the 14 brightest optical counterparts of X-ray sources identified by XMM-Newton in the direction of M 31 and for 21 optical counterparts in...
