Journal Article

Discovery of the 51.47-d orbital period in the supergiant fast X-ray transient XTE J1739−302 with <i>INTEGRAL</i>

S. P. Drave, D. J. Clark, A. J. Bird, V. A. McBride, A. B. Hill, V. Sguera, S. Scaringi and A. Bazzano

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 409, issue 3, pages 1220-1226
Published in print December 2010 | ISSN: 0035-8711
Published online December 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.17383.x
Discovery of the 51.47-d orbital period in the supergiant fast X-ray transient XTE J1739−302 with INTEGRAL

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Timing analysis of ∼12.4 Ms of INTEGRAL/IBIS data has revealed a period of 51.47 ± 0.02 d in the supergiant fast X-ray transient source XTE J1739−302/IGR J17391−3021 that can be interpreted as an orbital period. An outburst history showing 35 epochs of activity has been produced, showing X-ray outbursts throughout the orbit of XTE J1739−302. Possible indications of an enhanced equatorial density region within the supergiant stellar wind are present in the phase-folded light curve. It is found that many orbital configurations are possible within this system with eccentricities of up to e∼ 0.8.

Keywords: X-rays: binaries; X-rays: individual: XTE J1739−302; X-rays: bursts; stars: winds, outflows

Journal Article.  4750 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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