Investigation of CTA 1 with Suzaku Observation
Investigation of CTA 1 with Suzaku Observation
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通过朱雀观测研究 CTA 1
DOI：
10.1111/j.1365-2966.2012.21832.x
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
et al.
中科院分区：
文献类型：
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作者：
L. C. C. Lin;et al.
我们报道了超新星遗迹CTA 1（G119.5+10.2）的105 kS朱雀观测。采用定时模式和成像模式对朱雀星进行了软X射线观测。在这次深空观测中，首次发现了脉冲星风星云（PWN）的一个~ 10'扩展特征，它被解释为一个弓形激波成分。星云的光谱可以用幂律来模拟，光子指数约为1.8，这表明了一个缓慢的同步加速器冷却方案。光子指数在该扩展特征上近似恒定。我们比较和讨论我们的观察这个复杂的星云与以前的X射线调查。在软（0.2-12 keV）和硬（10-60 keV）X射线数据中，我们没有从中央脉冲星获得任何明显的脉动。无法探测主要是由于失去了精确成像能力，无法准确确定震源贡献。根据我们的分析，XIS和HXD的光谱可以直接连接而没有显著的光谱中断。未来对努斯塔和Astro-H的观测将能够解决污染问题，并提供CTA 1的精确硬X射线测量。
We report on an 105 ks Suzaku observation of the supernova remnant CTA 1 (G119.5+10.2). The Suzaku soft X-ray observation was carried out with both timing mode and imaging mode. A ~ 10' extended feature, which is interpreted as a bow-shock component of the pulsar wind nebula (PWN), is revealed in this deep observation for the first time. The nebular spectrum can be modelled by a power-law with a photon index of ~ 1.8 which suggests a slow synchrotron cooling scenario. The photon index is approximately constant across this extended feature. We compare and discuss our observations of this complex nebula with previous X-ray investigations. We do not obtain any significant pulsation from the central pulsar in the soft (0.2-12 keV) and hard (10-60 keV) X-ray data. The non-detection is mainly due to the loss of the precise imaging ability to accurately determine the source contribution. The spectra of XIS and HXD can be directly connected without a significant spectral break according to our analysis. Future observations of NuSTAR and Astro-H would be able to resolve the contamination and provide an accurate hard X-ray measurement of CTA 1.