Discovery of a 30-d period in the supergiant fast X-ray transient SAX J1818.6-1703
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.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- February 2009
- DOI:
- 10.1111/j.1745-3933.2008.00583.x
- arXiv:
- arXiv:0810.5696
- Bibcode:
- 2009MNRAS.393L..11B
- Keywords:
-
- gamma-rays: observations;
- X-rays: binaries;
- X-rays: individual: SAX J1818.6-1703;
- Astrophysics
- E-Print:
- 5 pages, 5 figures, 2 tables. Accepted for publication in MNRAS letters