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Suzaku observation of NGC 3516: complex absorption and the broad and narrow Fe K lines
Author(s) -
Markowitz A.,
Reeves J. N.,
Serlemitsos P.,
Yaqoob T.,
Awaki H.,
Fabian A.,
Gallo L.,
Griffiths R. E.,
Kunieda H.,
Miniutti G.,
Mushotzky R.,
Okajima T.
Publication year - 2006
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200610697
Subject(s) - physics , astrophysics , full width at half maximum , emission spectrum , equivalent width , ionization , spectral line , galaxy , line (geometry) , absorption (acoustics) , absorption spectroscopy , plasma , active galactic nucleus , astronomy , optics , ion , geometry , mathematics , quantum mechanics
We present preliminary results from a 150 ks Suzaku observation of the Seyfert 1 galaxy NGC 3516. Suzaku 's wide bandpass has enabled us to deconvolve the broadband emitting and absorbing components in this object, breaking model degeneracies inherent in previous, smaller‐bandpass spectra. The primary power‐law continuum is absorbed by an ionized absorber as well as a partial‐covering absorber; the column density of the ionized absorber has increased by a factor of ∼3 since XMM‐Newton observations in 2001. We detect a soft power‐law component which may be scattered emission. We confirm the presence of the broad Fe line, finding a $ 185^{+130} _{-70} $ eV equivalent width line that indicates emission extending down to a few Schwarzschild radii. Models which exclude either the broad line or the partial‐covering absorber are rejected. Suzaku 's high effective area and low background near 6 keV also allow us to resolve the narrow Fe K emission line; we find a FWHM velocity width near 4000 km s –1 , commensurate with Broad Line Region velocities. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)