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Astronomers observe a supergiant fast X-ray transient prototype

(—A team of astronomers led by Enrico Bozzo of the University of Geneva, Switzerland, has recently studied a prototype of a supergiant fast x-ray transient (SFXT), designated IGR J17544-2619. The researchers investigated its spectral variability during outburst and quiescence, as this source exhibits one of the most extreme levels of X-ray variability among other objects in the same class.
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