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arXiv · 1007.3379

Discovery of the 51.47 day orbital period in the supergiant fast X-ray transient XTE J1739-302 with INTEGRAL

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

Timing analysis of ~12.4 Ms of INTEGRAL/IBIS data has revealed a period of 51.47 +/- 0.02 days 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 lightcurve. It is found that many orbital configurations are possible within this system with eccentricities of up to e ~0.8 valid.

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S. P. Drave, D. J. Clark, A. J. Bird, V. A. McBride, A. B. Hill, V. Sguera, S. Scaringi, A. Bazzano. 2010-07-20. Discovery of the 51.47 day orbital period in the supergiant fast X-ray transient XTE J1739-302 with INTEGRAL. https://doi.org/10.1111/j.1365-2966.2010.17383.x

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