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IGR 12580+0134 is one of rare TDEs found with off-beam relativistic jet comma and is by far the nearest TDE ever found openPardvirgul17MpcclosePar. The source presented extremely unusual evolution of X-ray lightcurve comma with a rapid flux drop at virgul600 days followed by a weak but nearly constant X-ray emission that was visible at least until virgul2600 days after the stellar capture. This cannot be explained by standard tidal disruption theories comma but may be a Compton echo effect resulting from the Thomson scattering between primary X-rays and its surrounding gas. The goal of XMM proposal is to obtain high quality X-ray spectrum to test the Compton echo scenario for interpreting the residual X-ray emission. If confirmed comma the observation will enable to constrain the size comma density and geometry of the surrounding gas to BH.IGR 12580+0134是罕见的带有离轴相对论喷流（off-beam relativistic jet）的潮汐瓦解事件（Tidal Disruption Event, TDE）之一，也是迄今为止发现的距离最近的TDE源，其距离约为17百万秒差距（Mpc）。该源的X射线光变曲线演化极为反常：在恒星被捕获后约600天时出现快速流量衰减，随后呈现出微弱但近乎恒定的X射线辐射，该辐射至少持续至约2600天后仍可被观测到。这一现象无法用标准潮汐瓦解理论解释，但可能是由初级X射线与周围气体间的汤姆孙散射（Thomson scattering）引发的康普顿回波（Compton echo）效应。本次XMM-牛顿望远镜（XMM）观测提案的目标是获取高质量X射线光谱，以验证用于解释该残余X射线辐射的康普顿回波假说。若该假说得到证实，本次观测将能够限定围绕黑洞（Black Hole, BH）的周围气体的尺寸、密度与几何结构。