The X-ray spectrum of the black hole candidate Swift J1753.5-0127

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Abstract

We present a spectral analysis of the black hole candidate and X-ray transient source Swift J1753.5-0127 making use of simultaneous observations of XMM-Newton and Rossi X-ray Timing Explorer in 2006, when the source was in outburst. The aim of this paper is to test whether a thermal component due to the accretion disc is present in the X-ray spectrum. We fit the data with a range of spectral models, and we find that for all of these models, the fits to the X-ray energy spectra significantly require the addition of the disc blackbody component. We also find a broad iron emission line at around 6.5 keV, most likely due to iron in the accretion disc. Our results confirm the existence of a cool inner disc extending near or close to the innermost circular orbit. We further discovered broad emission lines of N VII and O VIII at ~0.52 and 0.65 keV, respectively, in the RGS spectrum of Swift J1753.5-0127. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.

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Mostafa, R., Yasein, M. N., Mendez, M., Soleri, P., Hiemstra, B., Belloni, T., & Ibrahim, A. I. (2013). The X-ray spectrum of the black hole candidate Swift J1753.5-0127. Monthly Notices of the Royal Astronomical Society, 431(3), 2341–2349. https://doi.org/10.1093/mnras/stt332

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