论文标题
Blazar H 2356-309的X射线通量和光谱变化
X-ray Flux and Spectral Variability of Blazar H 2356-309
论文作者
论文摘要
我们使用XMM-Newton观测值介绍了Blazar H 2356-309的定时和光谱分析的结果。在2005年6月13日至2013年12月在2013年12月的总共九个观察结果中观察到了这一Blazar。五个观察结果显示出中等通量变异性，幅度为1.7-2.2％。我们在这五个光曲线中搜索日内可变性时间尺度，但在其中任何一个曲线中都没有找到。软带中的分数可变性幅度通常低于硬带，这归因于依赖能量的同步加速器发射。使用硬度比分析，我们搜索X射线光谱变异性以及该来源中的通量变异性。但是，我们没有发现日内时间表上任何明显的频谱变异性。我们还研究了Blazar H 2356-309的X射线光谱曲率，并发现我们的六个观察结果是由Alpha = 1.99-2.15的对数寄生寄生虫模型很好地描述的，并且Beta = 0.03-0.18。我们的三个观察结果由Power Law模型很好地描述。 X射线光谱的断裂能量在1.97-2.31 KEV之间变化。我们研究了从对数抛物线模型中得出的各种参数之间的相关性，并讨论了它们的含义。
We present the results of timing and spectral analysis of the blazar H 2356-309 using XMM-Newton observations. This blazar is observed during 13 June 2005-24 December 2013 in total nine observations. Five of the observations show moderate flux variability with amplitude 1.7-2.2 percent. We search for the intra-day variability timescales in these five light curves, but did not find in any of them. The fractional variability amplitude is generally lower in the soft bands than in the hard bands, which is attributed to the energy dependent synchrotron emission. Using the hardness ratio analysis, we search for the X-ray spectral variability along with flux variability in this source. However, we did not find any significant spectral variability on intra-day timescales. We also investigate the X-ray spectral curvature of blazar H 2356-309 and found that six of our observations are well described by the log parabolic model with alpha=1.99-2.15 and beta=0.03-0.18. Three of our observations are well described by power law model. The break energy of the X-ray spectra varies between 1.97-2.31 keV. We investigate the correlation between various parameters that are derived from log parabolic model and their implications are discussed.
