The broad iron K alpha line of Cygnus X-1 as seen by XMM-Newton in the EPIC-pn modified timing mode

Duro R, Dauser T, Wilms J, Pottschmidt K, Nowak MA, Fritz S, Kendziorra E, Kirsch MGF, Reynolds CS, Staubert R (2011)


Publication Status: Published

Publication Type: Journal article

Publication year: 2011

Journal

Publisher: EDP SCIENCES S A

Book Volume: 533

Article Number: ARTN L3

DOI: 10.1051/0004-6361/201117446

Abstract

We present the analysis of the broadened, flourescent iron K alpha line in simultaneous XMM-Newton and RXTE data from the black hole Cygnus X-1. The XMM-Newton data were taken in a modified version of the timing mode of the EPIC-pn camera. In this mode the lower energy threshold of the instrument is increased to 2.8 keV to avoid telemetry drop outs due to the brightness of the source, while at the same time preserving the signal-to-noise ratio in the FeK alpha band. We find that the best-fit spectrum consists of the sum of an exponentially cutoff power-law and relativistically smeared, ionized reflection. The shape of the broadened FeKa feature is due to strong Compton broadening combined with relativistic broadening. Assuming a standard, thin accretion disk, the black hole is close to rotating maximally.

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APA:

Duro, R., Dauser, T., Wilms, J., Pottschmidt, K., Nowak, M.A., Fritz, S.,... Staubert, R. (2011). The broad iron K alpha line of Cygnus X-1 as seen by XMM-Newton in the EPIC-pn modified timing mode. Astronomy & Astrophysics, 533. https://dx.doi.org/10.1051/0004-6361/201117446

MLA:

Duro, Refiz, et al. "The broad iron K alpha line of Cygnus X-1 as seen by XMM-Newton in the EPIC-pn modified timing mode." Astronomy & Astrophysics 533 (2011).

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