Volume 458, Number 3, November II 2006
|Page(s)||741 - 746|
|Published online||12 September 2006|
XRF 050406 late-time flattening: an inverse Compton component?
IASF-Roma/INAF, Via Fosso del Cavaliere 100, 00133 Roma, Italy e-mail: Alessandra.Corsi@iasf-roma.inaf.it
2 Università degli studi di Roma “La Sapienza”, Piazzale Aldo Moro 5, 00185 Roma, Italy
3 INFN – Sezione di Roma c/o Dip. di Fisica – Università degli studi di Roma “La Sapienza”, Piazzale Aldo Moro 5, 00185 Roma, Italy
Accepted: 19 July 2006
Aims.We investigate for possible evidence of inverse Compton (IC) emission in the X-ray afterglow of XRF 050406.
Methods.In the framework of the standard fireball model, we show how the late-time flattening observed in the X-ray light curve between ~104 s and ~106 s can be explained in a synchrotron-plus-IC scenario when the IC peak frequency crosses the X-ray band.
Results.We thus conclude that the appearance of an IC component above the synchrotron one at late times successfully accounts for these X-ray observations.
Key words: gamma rays: bursts / X-rays: individuals: XRF 050406 / X-rays: bursts / radiation mechanisms: non-thermal
© ESO, 2006
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