NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-25 T02:56:14 PDT
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For refcode 2011ApJ...733...48T:
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2011ApJ...733...48T X-Ray Characteristics of NGC 3516: A View through the Complex Absorber Turner, T. J.; Miller, L.; Kraemer, S. B.; Reeves, J. N. Abstract. We consider new Suzaku data for NGC 3516 taken during 2009 along with other recent X-ray observations of the source. The cumulative characteristics of NGC 3516 cannot be explained without invoking changes in the line-of-sight absorption. Contrary to many other well-studied Seyfert galaxies, NGC 3516 does not show a positive lag of hard X-ray photons relative to soft photons over the timescales sampled. In the context of reverberation models for the X-ray lags, the lack of such a signal in NGC 3516 is consistent with flux variations being dominated by absorption changes. The lack of any reverberation signal in such a highly variable source disfavors intrinsic continuum variability in this case. Instead, the colorless flux variations observed at high flux states for NGC 3516 are suggested to be a consequence of Compton-thick clumps of gas crossing the line of sight. Key words: galaxies: active, galaxies: individual: NGC 3516, galaxies: Seyfert, X-rays: galaxies
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