The Suzaku Observation of NGC3516: Complex Absorption and the Broad and Narrow FeK Lines
Fabian, Andrew C.; Kunieda, Hideyo; Okajima, Takashi; Yaqoob, Tahir; Fukazawa, Yasushi; Awaki, Hisamitsu; Griffiths, Richard E.; Gallo, Luigi C.; Reeves, James N.; Miniutti, Giovanni; Mushotzky, Richard; Markowitz, Alex; Serlemitsos, Peter
United States, United Kingdom, Japan
Abstract
We present results from a 150ks Suzaku observation of the Seyfert 1.5 NGC3516 in 2005 October. The source was in a relatively highly absorbed state. Our best-fit model is consistent with the presence of a low-ionization absorber having a column density near 5×1022 cm-2 and covering most of the X-ray continuum source (covering fraction 96-100%). A high-ionization absorbing component, which yields a narrow absorption feature consistent with FeXXVIK, is confirmed. A relativistically broadened FeKα line was required in all fits, even after the complex absorption was taken into account; an additional partial-covering component is an inadequate substitute for the continuum curvature associated with the broad Fe line. A narrow FeKα emission line has a velocity width consistent with the Broad Line Region. The low-ionization absorber may be responsible for producing the narrow FeKα line, though a contribution from additional material out of the line of sight is possible. We include in our model soft band emission lines from He- and H-like ions of N, O, Ne, and Mg, consistent with photo-ionization, though a small contribution from collisionally-ionized emission is possible.