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BeppoSAX confirms extreme relativistic effects in the X-ray spectrum of MCG-6-30-15

M. Guainazzi·G. Matt·S. Molendi·A. Orr·F. Fiore·P. Grandi·A. Matteuzzi·T. Mineo·G. C. Perola·A. N. Parmar·L. Piro
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Abstract

We report the first simultaneous measure of the X-ray broadband (0.1--200 keV) continuum and of the iron K-alpha fluorescent line profile in the Seyfert 1 galaxy MCG-6-30-15. Our data confirms the ASCA detection of a skewed and redshifted line profile (Tanaka et al. 1995). The most straightforward explanation is that the line photons are emitted in the innermost regions of a X-ray illuminated relativistic disk. The line Equivalent Width (~200 eV) is perfectly consistent with the expected value for solar abundances, given the observed amount of Compton reflection. We report also the discovery of a cut-off in the nuclear primary emission at the energy of ~160 keV.

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M. Guainazzi, G. Matt, S. Molendi, A. Orr, F. Fiore, P. Grandi, A. Matteuzzi, T. Mineo, G. C. Perola, A. N. Parmar, L. Piro. 1998-11-16. BeppoSAX confirms extreme relativistic effects in the X-ray spectrum of MCG-6-30-15. https://arxiv.org/abs/astro-ph/9811246

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