AXP 1 RXS J170849-400910的详细高能特性-使用INTEGRAL、RXTE和XMM-牛顿探测磁层
Detailed high-energy characteristics of AXP 1RXS J170849-400910 - Probing the magnetosphere using INTEGRAL, RXTE and XMM-Newton
摘要:
我们提出了详细的光谱和时间特性在整个X射线波段。为此目的,使用了INTEGRAL、RXTE和XMM-牛顿的数据。INTEGRAL硬X射线(>10 keV)时间平均总光谱可以用光子指数γ = 1.13 +/- 0.06的幂律描述,并扩展到~175 keV。没有发现光谱突变的证据,也没有发现20千电子伏以上的明显的长期时间变化。脉冲发射测量到高达270 keV(12.3 sigma; 20-270 keV)。在脉冲轮廓中可以识别出三种不同的脉冲分量:1)在~ 4keV以上起作用的硬脉冲,2)在硬X射线域中不起作用的较软脉冲,以及3)低于2keV的非常软的脉冲分量。脉冲发射的详细相位分辨光谱证实了长期稳定性。光谱形状随着相位的变化逐渐从软的单次幂定律变为复杂的多分量形状,然后变为硬的单次幂定律。频谱在0.1宽的相位间隔内从非常硬的(Gamma = 0.99 +/-0.05)切换到非常软的(Gamma = 3.58 +/-0.34)单一幂律形状。我们确定了三个独立的组成部分。这三种形态分别是软实力法则、硬实力法则和曲线形态。这些频谱分量的归一化的相位分布形成三个解耦的脉冲轮廓。软分量在相位0.4附近达到峰值,而其他两个分量在相位0.8附近达到峰值。弯曲部件的宽度(相位约为0.25)约为硬部件宽度的一半。
英文摘要:
We present detailed spectral and temporal characteristics over the whole X-ray band. For this purpose data have been used from INTEGRAL, RXTE and XMM-Newton. The INTEGRAL hard X-ray (>10 keV) time-averaged total spectrum, can be described by a power law with a photon index Gamma = 1.13 +/- 0.06 and extends to ~175 keV. No evidence for a spectral break is found. No significant long-term time variability has been detected above 20 keV. Pulsed emission is measured up to 270 keV (12.3 sigma; 20-270 keV). Three different pulse components can be recognized in the pulse profiles: 1) a hard pulse which contributes above ~4 keV, 2) a softer pulse not contributing in the hard X-ray domain and 3) a very soft pulse component below 2 keV. Detailed phase-resolved spectroscopy of the pulsed emission confirms long-term stability. The spectral shape gradually changes with phase from a soft single power law to a complex multi-component shape and then to a hard single power law. The spectrum switches from a very hard (Gamma = 0.99 +/- 0.05) to a very soft (Gamma = 3.58 +/- 0.34) single power-law shape within a 0.1-wide phase interval. We identify three independent components. The three shapes are a soft power law, a hard power law and a curved shape. The phase distributions of the normalizations of these spectral components form three decoupled pulse profiles. The soft component peaks around phase 0.4 while the other two components peak around phase 0.8. The width of the curved component (~0.25 in phase) is about half the width of the hard component.
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