论文标题
XMM-Newton和SRG/EROSITA的观察值4xmm J022141.5-735632
XMM-Newton and SRG/eROSITA observations of the isolated neutron star candidate 4XMM J022141.5-735632
论文作者
论文摘要
我们使用XMM-Newton和Spectrum roentgen Gamma（SRG）Erosita的观测值报告了可能的新热发射孤立的中子星（INS），4xmm J022141.5-735632的随访研究结果。在光学和近红外波长中，传统调查成像补充了该分析。 X射线源是XMM-Newton第一个针对的X射线来源，目的是确定第四代XMM-Newton Serendipitous目录数据版本9（4XMM-DR9）中的第四代候选者，显示出非常软的能量分布，并且缺乏分类的配方；非常高的X射线与光学通量比实际上不包括除了INS之外的任何其他标识。在当前的观察限制内，近十年来没有明显的通量变化或光谱状态变化。未来的专用观察，特别是在寻找脉动方面，对于进一步阐明X射线源的性质以及与其他银河中子星星的关系至关重要。
We report the results of follow-up investigations of a possible new thermally emitting isolated neutron star (INS), 4XMM J022141.5-735632, using observations from XMM-Newton and Spectrum Roentgen Gamma (SRG) eROSITA. The analysis is complemented by Legacy Survey imaging in the optical and near-infrared wavelengths. The X-ray source, the first to be targeted by XMM-Newton in an effort to identify new INS candidates from the fourth generation of the XMM-Newton serendipitous source catalogue Data Release 9 (4XMM-DR9), shows a remarkably soft energy distribution and a lack of catalogued counterparts; the very high X-ray-to-optical flux ratio virtually excludes any other identification than an INS. Within current observational limits, no significant flux variation nor change of spectral state is registered over nearly ten years. Future dedicated observations, particularly to search for pulsations, are crucial to shed further light on the nature of the X-ray source and relations to other Galactic neutron stars.
