Supergiant Fast X-ray Transients: interpretation of archival INTEGRAL data

Details Supergiant Fast X-ray Transients: interpretation of archival INTEGRAL data Supergiant Fast X-ray Transients: interpretation of archival INTEGRAL data

2008-10-30

arxiv.org/abs/0810.5463v1

PoS Integral08:086,2008

Astronomy and Astrophysics

Astrophysics

Poster paper. To appear in the Proceedings of the 7th INTEGRAL Workshop held in Copenhagen on 2008 September 8-11

Scientific paper

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 1E36-1E37 erg/s and a frequent long term flaring activity reaching an X-ray luminosity of 1E33-1E34 erg/s, as recently detected by the Swift satellite. The quiescent level is around 1E32 erg/s. We performed a systematic re-analysis of archival INTEGRAL data of four SFXTs: IGRJ16479-4514, XTEJ1739-302, IGRJ17544-2619, IGRJ18410-0535. This led to the discovery of previously unnoticed outbursts from IGRJ16479-4514 and IGRJ17544-2619. 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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