论文标题
基于Insight-HXMT和Nustar观察结果，2019年爆发期间X射线Pulsar 4U 1901+03的光谱演变
Spectral evolution of X-ray pulsar 4U 1901+03 during the 2019 outburst based on Insight-HXMT and NuSTAR observations
论文作者
论文摘要
我们使用Insight-HXMT和Nustar观测值获得的数据报告了X射线Pulsar 4U 1901+03发射的详细光谱分析。由于Insight-HXMT对爆发的广泛覆盖范围，我们能够研究源的光谱演变，并将这些结果与以前的报告进行比较，重点是在10 KEV左右的推定吸收功能的特性。特别是，我们证明了4U 1901+03的宽带X射线连续体可以通过在10 KEV处没有吸收线的两个组分连续模型来很好地描述，这使其对其解释为循环基因线。数据的高质量还使我们能够同时执行相位平均和相位分辨的光谱分析作为光度的函数。最后，我们对Nustar数据中最近报告的30 keV大约30 keV进行了详细研究。我们表明，无论连续模型如何，在相平均和相分辨光谱中似乎都可以显着检测到此功能。
We report on a detailed spectral analysis of emission from X-ray pulsar 4U 1901+03 using data obtained by the Insight-HXMT and NuSTAR observatories during the 2019 outburst of the source. Thanks to the extensive coverage of the outburst by Insight-HXMT, we were able to investigate the spectral evolution of the source as a function of flux, and compare these results to the previous reports, focusing on the properties of a putative absorption feature at around 10 keV. In particular, we demonstrate that the broadband X-ray continuum of 4U 1901+03 can be well described with a two-component continuum model without an absorption line at 10 keV, which casts doubt on its interpretation as a cyclotron line. The high quality of the data also allowed us to perform both phase-averaged and phase-resolved spectral analyses as a function of luminosity. Finally, we performed a detailed investigation of another absorption feature in the spectrum of the source around 30 keV recently reported in the NuSTAR data. We show that this feature appears to be significantly detected both in phase-averaged and phase-resolved spectra irrespective of the continuum model.
