论文标题
LMXB 2S 0921-63与Suzaku的宽带光谱分析
Broad-band spectral analysis of LMXB 2S 0921-63 with Suzaku
论文作者
论文摘要
我们通过使用Suzaku档案数据介绍了低质量X射线二进制2S 0921-63的宽带光谱分析，该数据涵盖了四个近距离观测中0.31和1.16之间的轨道相。这是第一次对2S 0921-63进行的广泛频谱分析最多进行25 keV。在观察期间，0.5-10 KEV XIS计数率在$ \ sim $ 1和$ \ sim $ 5之间变化。在观察结果中观察到部分X射线日食和宽片后强度下降。 X射线发射在强度下降过程中略有硬化。我们通过为四个观测值中的每个观测值同时拟合XIS和HXD-PIN光谱来对源光谱进行建模。源的宽带光谱可以通过包含温度非常热的黑体的模型来描述，$ kt _ {\ rm bb} \约$ 1.66-2.13 kev，高能截止功率法和$ e _ {\ rm rm line} \ sim sim $ 6.7 kev的高能量截止功率法和Fe发射线。第二个模型，该模型考虑了积聚盘的热发射以及FE发射线的构成，它同样很好地描述了2S 0921-63的宽带光谱。
We present the broad-band spectral analysis of the low-mass X-ray binary 2S 0921-63 by using the Suzaku archival data covering the orbital phase between 0.31 and 1.16 during four close observations. It is the first time that a broad-band spectral analysis of 2S 0921-63 has been done up to 25 keV. The 0.5-10 keV XIS count rate varied between $\sim$ 1 and $\sim$ 5 counts s$^{-1}$ during the observations. A partial X-ray eclipse and broad post-eclipse intensity dip were observed during the observations. The X-ray emission hardened marginally during the intensity dip. We have modelled the source spectra by simultaneously fitting the XIS and HXD-PIN spectra for each of the four observations. The broad-band spectra of the source can be described by a model comprising a very hot blackbody having temperature, $kT_{\rm BB} \approx$ 1.66 - 2.13 keV, a high-energy cutoff power law, and an Fe emission line at $E_{\rm line} \sim$ 6.7 keV. A second model, accounting for the Comptonization of the thermal emission from accretion disc along with an Fe emission line, describes the broad-band spectra of 2S 0921-63 equally well.
