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arXiv 1306.1628astro-ph.HE
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用BeppoSAX观测到的ρ类微类星体GRS 1915+105的复杂时间行为。III:硬X射线延迟和极限环映射

The complex time behaviour of the microquasar GRS 1915+105 in the ρ-class observed with BeppoSAX. III: The hard X-ray delay and limit cycle mapping

F. Massa, E. Massaro, T. Mineo, A. D'Aì, M. Feroci, P. Casella, T. Belloni

摘要:

2000年10月,BeppoSAX对微类星体GRS 1915 +105进行了为期10天的观测,观测源处于ρ模,其特征是一个准规则的I型爆发活动。本文系统地分析了硬、软X射线在爆发峰值处的发射延迟。滞后,也明显从[1.7-3.4] keV的光曲线与那些在[6.8-10.2] keV范围内的比较,作为时间,光谱参数和通量的函数进行评估和研究。我们应用极限环映射技术,作为独立变量的计数率和平均光子速率。使用该技术的结果还使用具有互相关方法的更标准的方法进行交叉检查。数据以运行的形式组织,每个运行相对于一个连续的观察间隔。检测到的硬-软延迟在指向的过程中从大约3秒变化到大约10秒,并且呈现出与基线计数率的明显相关性。

英文摘要:

The microquasar GRS1915+105 was observed by BeppoSAX in October 2000 for about ten days while the source was in ρ-mode, which is characterized by a quasi-regular type I bursting activity. This paper presents a systematic analysis of the delay of the hard and soft X-ray emission at the burst peaks. The lag, also apparent from the comparison of the [1.7-3.4] keV light curves with those in the [6.8-10.2] keV range, is evaluated and studied as a function of time, spectral parameters, and flux. We apply the limit cycle mapping technique, using as independent variables the count rate and the mean photon rate. The results using this technique were also cross-checked using a more standard approach with the cross-correlation methods. Data are organized in runs, each relative to a continuous observation interval. The detected hard-soft delay changes in the course of the pointing from about 3 s to about 10 s and presents a clear correlation with the baseline count rate.

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