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

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.

preprint2015arXivOpen access
Damien RobertsonLuigi C. GalloAbderahmen ZoghbiAndrew C. Fabian
astro-ph.HE
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Damien RobertsonLuigi C. GalloAbderahmen ZoghbiAndrew C. Fabian

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