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arXiv 1507.05201astro-ph.HE
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窄线Seyfert 1星系1H 0707-495中X射线和UV同时辐射相关性的研究

Searching for Correlations in Simultaneous X-ray and UV Emission in the Narrow-line Seyfert 1 galaxy 1H 0707-495

Damien Robertson, Luigi C. Gallo, Abderahmen Zoghbi, Andrew C. Fabian

摘要:

我们研究同时X射线和紫外光曲线从多历元8天XMM牛顿观测的窄线塞弗特1星系1H 0707-495。同步观测表明,X射线和紫外辐射都是变化的,而且在这两个时期,X射线的变化幅度明显大于紫外辐射的变化幅度。使用离散关联函数(DCF)的X射线和紫外光曲线的相关性进行了检查的时间尺度高达7.0天。观察到与导致X射线变化的UV的低显著性(~ 95%置信度)相关性。紫外和X射线波段之间缺乏显著的相关性,这似乎与X射线源中心紧凑并且在靠近黑洞的地方被光弯曲所主导的情况相一致。此外,多波段X射线光变曲线的相关性进行了检查相似的时间尺度。高度显着(> 99.9%的置信度)的相关性,观察到在零滞后与以前的研究一致的活动星系核。

英文摘要:

We examine simultaneous X-ray and UV light curves from multi-epoch 8 day XMM Newton observations of the narrow line Seyfert 1 galaxy 1H 0707-495. The simultaneous observations reveal that both X-ray and UV emission are variable and that the amplitude of the X-ray variations is significantly greater than that of the UV variations in both epochs. Using a discrete correlation function (DCF) the X-ray and UV light curves were examined for correlation on timescales up to 7.0 d. Low significance (~ 95 percent confidence) correlations with the UV leading the X-ray variations are observed. The lack of a significant correlation between the UV and X-ray bands seems consistent with the X-ray source being centrally compact and dominated by light bending close to the black hole. In addition, multi-band X-ray light curves were examined for correlations on similar timescales. Highly significant (> 99.9 per cent confidence) correlations were observed at zero lag consistent with previous studies of this AGN.

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