论文标题
X射线Pulsar 1E 1145.1-6141的Nustar观察
NuSTAR observation of X-ray pulsar 1E 1145.1-6141
论文作者
论文摘要
在本文中，我们报告了X射线脉冲星1E 1145.1-6141的硬X射线观察，该X射线使用核光谱望远镜阵列任务（Nustar）进行。检测到$ \ sim296.653 \; \ pm \; 0.021 \; s $的源脉动的相干脉动。根据其脉冲时期的最新测量值，该来源可能处于平衡阶段。脉冲轮廓揭示了轻度的能量依赖性，并且通常暗示铅笔梁图案。脉冲轮廓随着时间的流逝而演变。发现脉冲分数取决于能量，而在$ \ sim 32 \的值下降; kev $。 Nustar光谱可以通过具有两个连续分量的复合模型近似，黑体发射，截止电源和以高斯形式的离散组件来说明铁的发射线。源的估计吸收通量为$ \ sim6 \ times10^{ - 10} \; erg \; cm^{ - 2} \; s^{ - 1} $，对应于$ \ sim5 \ sim5 \ sim5 \ sim5 \ sim5 \ sim5 \ sim5 \ times 10^{36}}} \ erg; erg; s^; s^; s^{ - 1} $的亮度。进行脉冲相分辨的光谱法以了解具有脉冲相的光谱参数的演变。发现估计的黑体半径与理论预测的大小一致。
In this paper, we report on the hard X-ray observation of the X-ray pulsar 1E 1145.1-6141 performed with the Nuclear Spectroscopic Telescope Array mission (NuSTAR). The coherent pulsation of the source with a period of $\sim296.653\;\pm\;0.021\;s $ is detected. The source may be in the equilibrium phase, according to the most recent measurements of its pulse period. The pulse profile reveals a mild energy dependence and generally hints at a pencil-beam pattern. The pulse profile have evolved with time. The Pulse fraction is found to depend on energy with a fall in the value at $\sim 32\; keV$. The NuSTAR spectra can be approximated by a composite model with two continuum components, a blackbody emission, cut-off powerlaw, and a discrete component in the form of gaussian to account for the emission line of iron. The estimated absorbed flux of the source is $\sim6\times10^{-10}\;erg\;cm^{-2}\;s^{-1}$ which corresponds to a luminosity of $\sim5\times 10^{36}\;erg\;s^{-1}$. Pulse phase-resolved spectroscopy were performed to understand the evolution of spectral parameters with pulse phase. The estimated blackbody radius is found to be consistent with the size of the theoretical prediction.
