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Broadband spectrum of the X-ray nova SWIFT J174510.8-262411 at the decaying phase of its outburst

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Abstract

Results of quasi-simultaneous SWIFT and RTT-150 observations for the X-ray nova SWIFT J174510.8-262411 in May–June 2013 at the decaying phase of its outburst are presented. It is shown that the nova spectrum can be fitted in a very wide energy range (from the infrared z and i bands to hard X-rays) by a single power law attenuated due to absorption but without any traces of the presence of a soft (blackbody) component. The presence of such a component is suggested by the generally accepted models of disk accretion onto a black hole in a binary system. The observation of a single power-law spectrum may imply that synchrotron radiation from the source’s relativistic jets makes a major contribution to its flux or that the accretion disk is everywhere hot, optically thin, and radiates nonthermally.

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Authors and Affiliations

  1. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, Moscow, 117997, Russia

    S. A. Grebenev, A. V. Prosvetov & R. A. Burenin

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  1. S. A. Grebenev
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  2. A. V. Prosvetov
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  3. R. A. Burenin
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Correspondence to S. A. Grebenev.

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Original Russian Text © S.A. Grebenev, A.V. Prosvetov, R.A. Burenin, 2014, published in Pis’ma v Astronomicheskiı Zhurnal, 2014, Vol. 40, No. 4, pp. 198–204.

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Grebenev, S.A., Prosvetov, A.V. & Burenin, R.A. Broadband spectrum of the X-ray nova SWIFT J174510.8-262411 at the decaying phase of its outburst. Astron. Lett. 40, 171–176 (2014). https://doi.org/10.1134/S106377371404001X

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  • DOI: https://doi.org/10.1134/S106377371404001X

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