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• W3102046651 abstract "To investigate further the comparison between AGN and black hole X-ray binaries, we have studied the main X-ray variability properties of the Seyfert 1 Galaxy Markarian 335. We put particular emphasis on the X-ray time lags, which is a potentially important diagnostic of physical models. From a 100 ksec observation by XMM-Newton we show that the power spectrum of this source is well fitted by a bending power law model, and the bend time-scale Tb is precisely at the value predicted by the Tb vs Hbeta line-width relation of McHardy et al. Variations in different energy bands show time-scale dependent time lags, where higher energy bands lag lower ones. The lag, tau, varies as a function of the Fourier frequency, f, of the variability component in the light curves as tau propto 1/f at low frequencies, but there is a sharp cut-off in the lags at a frequency close to the bend frequency in the power spectrum. Similar behaviour is seen in black hole X-ray binary systems. The length of the time lags increases continuously with energy separation, in an almost log-linear relation. We show that the lag spectra can be produced by fluctuations propagating through the accretion flow as long as the energy spectrum of the X-ray emitting region hardens towards the centre." @default.
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• W3102046651 date "2008-07-21" @default.
• W3102046651 modified "2023-10-17" @default.
• W3102046651 title "X-ray variability of the Seyfert 1 Markarian 335: power spectrum and time lags" @default.
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• W3102046651 doi "https://doi.org/10.1111/j.1365-2966.2008.13367.x" @default.
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