Searching for correlations in simultaneous X-ray and UV emission in the narrow-line Seyfert 1 galaxy 1H 0707-495

被引：55
作者：
Robertson, D. R. S. [1 ,2 ]
Gallo, L. C. [1 ]
Zoghbi, A. [3 ]
Fabian, A. C. [4 ]
机构：
[1] St Marys Univ, Dept Phys & Astron, Halifax, NS B3H 3C3, Canada
[2] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada
[3] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA
[4] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2015年 / 453卷 / 04期
基金：
加拿大自然科学与工程研究理事会;
关键词：
galaxies: active; galaxies: individual: 1H 0707-495; galaxies: Seyfert; X-rays: galaxies; X-rays: individual: 1H 0707-495; ACTIVE GALACTIC NUCLEI; XMM-NEWTON; OPTICAL VARIABILITY; EXTREME VARIABILITY; BLACK-HOLES; GALAXY-1H-0707-495; 1H-0707-495; ULTRAVIOLET; REFLECTION; TELESCOPE;
D O I：
10.1093/mnras/stv1575
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We examine simultaneous X-ray and UV light curves from multi-epoch 8 d 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 the X-ray and UV light curves were examined for correlation on time-scales up to 7 d. Low-significance (similar to 95 per cent 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, multiband X-ray light curves were examined for correlations on similar time-scales. Highly significant (>99.9 per cent confidence) correlations were observed at zero lag consistent with previous studies of this active galactic nucleus.
引用
收藏
页码：3455 / 3460
页数：6
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