Properties of X-ray sources in M31/M33
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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...
我们获取了由XMM-牛顿(XMM-Newton)望远镜在M 31天区中识别出的14个最亮X射线源的光学对应体的光学光谱,以及21个光学对应体的……



