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2010•Monthly Notices of the Royal Astronomical SocietyOpen access

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

S. P. Drave, David Clark, A. J. Bird, V. A. McBride, A. B. Hill, V. Sguera, Simone 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 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.

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What this paper is about

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.

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Available abstract

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.

Key concepts: Supergiant, Physics, Orbital period, X-ray transient, Astrophysics, Astronomy, Transient (computer programming), Orbit (dynamics)

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Discovery of the 51.47-d orbital period in the supergiant fast X-ray transient XTE J1739−302 with INTEGRAL — Research Paper | ScholarLens