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arXiv 2104.06453astro-ph.HE
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2019年XTE J1908 +094的弱X射线活度特性

Properties of Faint X-ray Activity of XTE J1908+094 in 2019

Debjit Chatterjee, Arghajit Jana, Kaushik Chatterjee, Riya Bhowmick, Sujoy Kumar Nath, Sandip K. Chakrabarti, A. Mangalam, Dipak Debnath

摘要:

研究了银河系瞬态黑洞候选者XTE~J1908+094在2019年爆发期间的微弱X射线活动特性。在这里,我们报告详细的光谱和时间分析的结果,在这次爆发使用的观测{ \it核光谱望远镜阵列(NuSTAR)}。我们没有观察到任何准周期振荡(QPO)的功率密度谱(PDS)。光谱研究表明,在X射线活动的这段短时间内,源保持在较软(更准确地说是软中间)的光谱状态。我们注意到在6.5 keV附近有一条微弱但宽的Fe K $α$发射线。我们还估计黑洞的可能质量为$6.5^{+0.5}_{-0.7}~M_\odot$,置信度为90%。

英文摘要:

We study the properties of the faint X-ray activity of Galactic transient black hole candidate XTE~J1908+094 during its 2019 outburst. Here, we report the results of detailed spectral and temporal analysis during this outburst using observations from {\it Nuclear Spectroscopic Telescope Array (NuSTAR)}. We have not observed any quasi-periodic-oscillations (QPOs) in the power density spectrum (PDS). The spectral study suggests that the source remained in the softer (more precisely in soft-intermediate) spectral state during this short period of the X-ray activity. We notice a faint but broad Fe K$α$ emission line at around 6.5 keV. We also estimate the probable mass of the black hole to be $6.5^{+0.5}_{-0.7}~M_\odot$ with 90\% confidence.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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