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

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

2008-10-31

arxiv.org/abs/0810.5696v1

Astronomy and Astrophysics

Astrophysics

5 pages, 5 figures, 2 tables. Accepted for publication in MNRAS letters

Scientific paper

10.1111/j.1745-3933.2008.00583.x

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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