Broad iron L line and x-ray reverberation in 1H0707-495
Broad iron L line and x-ray reverberation in 1H0707-495
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.
galaxies, active, individual, 1H0707-495, nuclei, seyfert, X-rays
2419-2432
Zoghbi, A.
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Fabian, A.C.
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Uttley, Philip
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Miniutti, G.
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Gallo, L.C.
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Reynolds, C.S.
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Miller, J.M.
078305f0-03c7-4982-95ff-a92bc2f75b54
Ponti, Gabriele
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27 November 2009
Zoghbi, A.
06e09477-a459-4c81-b7fb-cafeb08b69f4
Fabian, A.C.
0c353376-f159-4129-b03e-d3993c0c5406
Uttley, Philip
db770bd7-d97e-43f5-99d4-a585bccd352a
Miniutti, G.
99a8888c-5809-4220-8a92-2c0d7ba0dd00
Gallo, L.C.
d46fb09d-b084-4d66-a646-2fd0bffeb47b
Reynolds, C.S.
33aa7441-962e-4498-90dd-5d8ee14cf0fa
Miller, J.M.
078305f0-03c7-4982-95ff-a92bc2f75b54
Ponti, Gabriele
1e60398d-fc61-4f6e-be2e-e6b31c2d3623
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), .
(doi:10.1111/j.1365-2966.2009.15816.x).
Abstract
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
Identifiers
Local EPrints ID: 144549
URI: http://eprints.soton.ac.uk/id/eprint/144549
ISSN: 1365-2966
PURE UUID: db32c47d-0912-4c18-86d0-0de11180ab6a
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Date deposited: 24 May 2010 11:52
Last modified: 14 Mar 2024 00:47
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Contributors
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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