Long-term flaring activity of XRF 011030 observed with BeppoSAX

Free access article

Issue		A&A Volume 455, Number 2, August IV 2006


Page(s)		413 - 422
Section		Extragalactic astronomy
DOI		http://dx.doi.org/10.1051/0004-6361:20054448

A&A 455, 413-422 (2006)
DOI: 10.1051/0004-6361:20054448

Long-term flaring activity of XRF 011030 observed with BeppoSAX

A. Galli and L. Piro

Istituto Astrofisica Spaziale e Fisica Cosmica - Sezione di Roma, INAF, via del Fosso del Cavaliere, 100-00113 Roma, Italy
e-mail: alessandra.galli@rm.iasf.cnr.it

(Received 31 October 2005 / Accepted 18 March 2006 )

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: bursts

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