| Abstract
| - Abstract. SAX J1818.6-1703 has been characterized 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 d, with a high degree of recurrence. SAX J1818.6-1703 is therefore the second supergiant fast X-ray transient shown to exhibit periodic outbursts, but with a considerably shorter period than the other known system, IGR J11215-5952.
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