ar X iv : 0 81 0 . 54 63 v 1 [ as tr o - ph ] 3 0 O ct 2 00 8 Supergiant Fast X - ray Transients : interpretation of archival INTEGRAL data
نویسنده
چکیده
INTEGRAL monitoring of the Galactic Plane in the last 5 years revealed a new subclass of High Mass X-ray Binaries (HMXBs), the Supergiant Fast X-ray Transients (SFXTs). They display flares lasting from minutes to hours, with peak luminosity of 1036 −1037 erg s−1 and a frequent long term flaring activity reaching an X-ray luminosity of 1033 − 1034 erg s−1, as recently detected by the Swift satellite. The quiescent level is around 1032 erg s−1. We performed a systematic re-analysis of archival INTEGRAL data of four SFXTs: IGR J16479-4514, XTE J1739-302, IGR J17544-2619, IGR J18410-0535. This led to the discovery of previously unnoticed outbursts from IGR J16479-4514 and IGR J17544-2619. We discuss these results in the framework of the different structure of the supergiant wind proposed to explain the outburst from this new class of sources.
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