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Aims. The Seyfert 1.9 galaxy MCG–05–23–016 has been shown to exhibit a complex X-ray spectrum. This source has moderate X-ray luminosity, hosts a comparably low-mass black hole, but accretes at a high Eddington rate, and allows us to study a super massive black hole in an early stage.
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Beckmann et al. (2008) studied this question.
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