XMM-Newton RGS Spectroscopy of the M31 Bulge. I. Evidence for a Past AGN Half a Million Years Ago
Journal article published in 2019 by
Shuinai Zhang 
,
Q. Daniel Wang ,
Adam R. Foster ,
Wei Sun ,
Zhiyuan Li ,
Li Ji
,
Q. Daniel Wang ,
Adam R. Foster ,
Wei Sun ,
Zhiyuan Li ,
Li Ji
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