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Multi-wavelength study of the Seyfert 1 galaxy NGC 3783 with XMM-Newton

Blustin, A. J. and Branduardi-Raymont, G. and Behar, E. and Kaastra, J. S. and Kahn, S. M. and Page, M. J. and Sako, M. and Steenbrugge, K. C. (2002) Multi-wavelength study of the Seyfert 1 galaxy NGC 3783 with XMM-Newton. Astronomy & Astrophysics, 392 (2). pp. 453-467. ISSN 0004-6361. doi:10.1051/0004-6361:20020914.

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We present the analysis of multi-wavelength XMM-Newton data from the Seyfert galaxy NGC 3783, including UV imaging, X-ray and UV lightcurves, the 0.2-10 keV X-ray continuum, the iron Kα emission line, and high-resolution spectroscopy and modelling of the soft X-ray warm absorber. The 0.2-10 keV spectral continuum can be well reproduced by a power-law at higher energies; we detect a prominent Fe Kα emission line, with both broad and narrow components, and a weaker emission line at 6.9 keV which is probably a combination of Fe Kβ and Fe XXVI. We interpret the significant deficit of counts in the soft X-ray region as being due to absorption by ionised gas in the line of sight. This is demonstrated by the large number of narrow absorption lines in the RGS spectrum from iron, oxygen, nitrogen, carbon, neon, argon, magnesium, silicon and sulphur. The wide range of iron states present in the spectrum enables us to deduce the ionisation structure of the absorbing medium. We find that our spectrum contains evidence of absorption by at least two phases of gas: a hotter phase containing plasma with a log ionisation parameter ξ(where ξ is in erg cm s^(-1)) of 2.4 and greater, and a cooler phase with log ξ centred around 0.3. The gas in both phases is outflowing at speeds of around 800 km s^(-1). The main spectral signature of the cold phase is the Unresolved Transition Array (UTA) of M-shell iron, which is the deepest yet observed; its depth requires either that the abundance of iron, in the cold phase, is several times that of oxygen, with respect to solar abundances, or that the absorption lines associated with this phase are highly saturated. The cold phase is associated with ionisation states that would also absorb in the UV.

Item Type:Article
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URLURL TypeDescription Paper
Kaastra, J. S.0000-0001-5540-2822
Page, M. J.0000-0002-6689-6271
Additional Information:© 2002 ESO. Article published by EDP Sciences. Received 8 May 2002; Accepted 14 June 2002; Published online 30 August 2002. This work is based on observations obtained with XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and the USA (NASA). The MSSL authors acknowledge the support of PPARC. SRON is supported financially by NWO, the Netherlands Organization for Scientific Research. Thanks are due to F. Haberl for providing a PN small window mode response matrix.
Funding AgencyGrant Number
Particle Physics and Astronomy Research Council (PPARC)UNSPECIFIED
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)UNSPECIFIED
Subject Keywords:galaxies: active – galaxies: Seyfert – galaxies: individual (NGC 3783) – X-rays: galaxies – ultraviolet: galaxies – techniques: spectroscopic
Issue or Number:2
Record Number:CaltechAUTHORS:20180306-140646081
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Official Citation:Multi-wavelength study of the Seyfert 1 galaxy NGC 3783 with XMM-Newton. A. J. Blustin, G. Branduardi-Raymont, E. Behar, J. S. Kaastra, S. M. Kahn, M. J. Page, M. Sako and K. C. Steenbrugge. A&A, 392 2 (2002) 453-467. DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85142
Deposited By: Tony Diaz
Deposited On:06 Mar 2018 22:41
Last Modified:15 Nov 2021 20:26

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