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13 March 2025

» arxiv » astro-ph/0511088

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Supergiant Fast X-ray Transients: A new class of high mass X-ray binaries unveiled by INTEGRAL
Ignacio Negueruela ; David M. Smith ; Pablo Reig ; Sylvain Chaty ; Jose Miguel Torrejon ;
Date:	2 Nov 2005
Abstract:	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.
Source:	arXiv, astro-ph/0511088
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