Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-11-02
ESA Spec.Publ. 604 (2006) 165
Astronomy and Astrophysics
Astrophysics
To appear in Proceedings of "The X-ray Universe 2005", held in San Lorenzo de El Escorial (Madrid, Spain), 26-30 September 200
Scientific paper
INTEGRAL monitoring of the Galactic Plane is revealing a growing number of recurrent X-ray transients, characterised by short outbursts with very fast rise times (~ tens of minutes) and typical durations of a few hours. Here we show that several of these transients are associated with OB supergiants and hence define a new class of massive X-ray binaries which we call Supergiant Fast X-ray Transients (SFXTs). Many other transient X-ray sources display similar X-ray characteristics, suggesting that they belong to the same class. Since they are difficult to detect and their number is growing fast and steadily, they could represent a major class of X-ray binaries.
Chaty Sylvain
Negueruela Ignacio
Reig Pablo
Smith Masson D.
Torrejon Jose Miguel
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