Discovery of a 30 day period in the supergiant fast X-ray transient SAX J1818.6-1703

A. J. Bird; A. Bazzano; A. B. Hill; V. A. McBride; V. Sguera; S. E. Shaw; H. J. Watkins

doi:10.1111/j.1745-3933.2008.00583.x

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arXiv · 0810.5696

Discovery of a 30 day period in the supergiant fast X-ray transient SAX J1818.6-1703

A. J. Bird·A. Bazzano·A. B. Hill·V. A. McBride·V. Sguera·S. E. Shaw·H. J. Watkins

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Abstract

SAX J1818.6-1703 has been characterised as a Supergiant Fast X-ray Transient system on the basis of several INTEGRAL/IBIS detections since the original BeppoSAX Wide Field Camera detection. Using IBIS/ISGRI, Swift/BAT and archival observations, we show that in fact SAX J1818.6-1703 exhibits emission on a period of 30 +/- 0.1 days, with a high degree of recurrence. SAX J1818.6-1703 is therefore the second SFXT shown to exhibit periodic outbursts, but with a considerably shorter period than the other known system, IGR J11215-5952.

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A. J. Bird, A. Bazzano, A. B. Hill, V. A. McBride, V. Sguera, S. E. Shaw, H. J. Watkins. 2008-10-31. Discovery of a 30 day period in the supergiant fast X-ray transient SAX J1818.6-1703. https://doi.org/10.1111/j.1745-3933.2008.00583.x

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