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X-ray Signatures of an Ionized Reprocessor in the Seyfert galaxy Ton S 180

T. J. Turner·I. M. George·K. Nandra
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Abstract

We discuss the hard X-ray properties of the Seyfert galaxy Ton S 180, based upon the analysis of ASCA data. We find the X-ray flux varied by a factor ~2 on a time scale of a few thousand seconds. The source showed significantly higher amplitude of variability in the 0.5-2 keV band than in the 2-10 keV band. The continuum is adequately parameterized as a Gamma ~ 2.5 power-law across the 0.6--10 keV band . We confirm the recent discovery of an emission line of high equivalent width, due to Fe K-shell emission from highly-ionized material. These ASCA data show the Fe line profile to be broad and asymmetric and tentatively suggest it is stronger during the X-ray flares, consistent with an origin from the inner parts of an accretion disk. The X-ray spectrum is complex below 2 keV, possibly due to emission from a blend of soft X-ray lines, which would support the existence of an ionized reprocessor, most likely due to a relatively high accretion rate in this source.

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T. J. Turner, I. M. George, K. Nandra. 1998-06-30. X-ray Signatures of an Ionized Reprocessor in the Seyfert galaxy Ton S 180. https://doi.org/10.1086/306434

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