8th HEAD Meeting, 8-11 September, 2004
Session 26 AGN/Galactic Nuclei
Poster, Friday, September 10, 2004, 9:00am-10:00pm

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[26.04] A Simultaneous XMM/RXTE Observation of the BLRG 3C 111

K. T. Lewis, M. Eracleous (Penn State), M. Gliozzi, R. M. Sambruna (George Mason University), R. Mushotzky (NASA/GSFC)

We present the results of a simultaneous XMM-Newton and RXTE observation of the Broad-Line Radio Galaxy 3C 111. We find that the Compton reflection bump is extremely weak, however broad residuals are clearly present in the spectrum near the Fe K \alpha line. When fit with a Gaussian emission line, the feature has an equivalent width of 60±20 eV and FWHM of 40,000±20,000 km/s. The width of the line suggests an origin in the inner accretion disk, which is, however, inconsistent with the lack of Compton reflection. An alternative possibility, which is more appealing because it is self-consistent, is that the broad residuals are an artifact of partial covering of the primary X-ray source. The data are well fitted by a model that includes an absorber with a column density of ~ 1023 cm-2 covering ~20% of the source. A weak, unresolved Fe K \alpha line remains which is consistent with being formed by transmission through the partial covering absorber or reflection from a distant, Compton-thin molecular torus. This research was funded by XMM-Newton Grant (NAG5-9982), the NASA Graduate Research Fellows Program (NGT5-50387), and the Pennsylvania Space Grant Consortium.

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Bulletin of the American Astronomical Society, 36 #3
© 2004. The American Astronomical Soceity.