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(DOI: will be inserted by hand later) Long-term flaring activity of XRF 011030 observed with

By A. Galli and L. Piro


Received....; accepted.... Abstract. We present the spectral and temporal analysis of the X-ray flash XRF 011030 observed with BeppoSAX. This event is characterized by a very long X–ray bursting activity that lasts about 1500 s, one of the longest ever observed by BeppoSAX. In particular, a precursor and a late flare are present in the light curve. We connect the late X–ray flare observed at about 1300 s to the afterglow emission observed by Chandra and associate it with the onset of the afterglow emission in the framework of external shock by a long duration engine activity. We find that the late X-ray flare and the broadband afterglow data, including optical and radio measurements, are consistent either with a fireball expanding in a wind environment or with a jetted fireball in an ISM. Key words. radiation mechanism: non-thermal- gamma rays: burs

Year: 2006
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