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Broad iron L line and x-ray reverberation in 1H0707-495

Zoghbi, A., Fabian, A.C., Uttley, Philip, Miniutti, G., Gallo, L.C., Reynolds, C.S., Miller, J.M. and Ponti, Gabriele (2009) Broad iron L line and x-ray reverberation in 1H0707-495 Monthly Notices of the Royal Astronomical Society, 401, (4), pp. 2419-2432. (doi:10.1111/j.1365-2966.2009.15816.x).

Record type: Article


A detailed analysis of a long XMM-Newton observation of the narrow-line type 1 Seyfert galaxy 1H0707-495 is presented, including spectral fitting, spectral variability and timing studies. The two main features in the spectrum are the drop at ?7?keV and a complex excess below 1?keV. These are well described by two broad, K and L, iron lines. Alternative models based on absorption, although they may fit the high-energy drop, cannot account for the 1?keV complexity and the spectrum as a whole.

Spectral variability shows that the spectrum is composed of at least two components, which are interpreted as a power law dominating between 1-4?keV and a reflection component outside this range. The high count rate at the iron L energies has enabled us to measure a significant soft lag of ?30 s between 0.3-1 and 1-4?keV, meaning that the direct hard emission leads the reflected emissions. We interpret the lag as a reverberation signal originating within a few gravitational radii of the black hole.

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Published date: 27 November 2009
Keywords: galaxies, active, individual, 1H0707-495, nuclei, seyfert, X-rays


Local EPrints ID: 144549
ISSN: 0035-8711
PURE UUID: db32c47d-0912-4c18-86d0-0de11180ab6a

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Date deposited: 24 May 2010 11:52
Last modified: 18 Jul 2017 23:08

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Author: A. Zoghbi
Author: A.C. Fabian
Author: Philip Uttley
Author: G. Miniutti
Author: L.C. Gallo
Author: C.S. Reynolds
Author: J.M. Miller
Author: Gabriele Ponti

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