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).


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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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1111/j.1365-2966.2009.15816.x
ISSNs: 0035-8711 (print)
Related URLs:
Keywords: galaxies, active, individual, 1H0707-495, nuclei, seyfert, X-rays
ePrint ID: 144549
Date :
Date Event
27 November 2009Published
Date Deposited: 24 May 2010 11:52
Last Modified: 18 Apr 2017 20:00
Further Information:Google Scholar

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