论文标题

揭示了时钟伯斯特的光谱状态过渡,GS 1826-238与nustar straycats

Revealing the spectral state transition of the Clocked Burster, GS 1826-238 with NuSTAR StrayCats

论文作者

Yun, S. B., Grefenstette, B. W., Ludlam, R. M., Brumback, M. C., Buisson, D. J. K., Mastroserio, G., Pike, S. N.

论文摘要

我们使用来自Nustar straycats的数据,介绍了GS 1826-238的长期分析,该GS 1826-238是一种名为“时钟伯斯特”的中子X射线二进制二进制二进制二进制分析。 nustar流浪光数据的目录中,straycats包含来自Nustar Optics尚未集中的明亮,离轴X射线源的数据。我们从2014 - 2021年获得了来源的流量观测,并使用Nustar-Gen-Utils Python工具减少并分析了数据,证明了源从“岛”环礁州到“香蕉”分支的过渡。我们还介绍了来自时钟伯斯特的I型X射线爆发的灯曲线分析,并表明,香蕉/软状态的爆发在持续时间内系统地比来自岛/硬状态的爆发更短,并且爆发的通量更高。从我们的分析中,我们注意到源的质量积聚率增加,并且随着过渡的爆发频率下降。

We present the long term analysis of GS 1826-238, a neutron star X-ray binary known as the "Clocked Burster", using data from NuSTAR StrayCats. StrayCats, a catalogue of NuSTAR stray light data, contains data from bright, off-axis X-ray sources that have not been focused by the NuSTAR optics. We obtained stray light observations of the source from 2014-2021, reduced and analyzed the data using nustar-gen-utils Python tools, demonstrating the transition of source from the "island" atoll state to a "banana" branch. We also present the lightcurve analysis of Type I X-Ray bursts from the Clocked Burster and show that the bursts from the banana/soft state are systematically shorter in durations than those from the island/hard state and have a higher burst fluence. From our analysis, we note an increase in mass accretion rate of the source, and a decrease in burst frequency with the transition.

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