EDP Sciences
Free access
Volume 424, Number 3, September IV 2004
Page(s) L27 - L30
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:200400047

A&A 424, L27-L30 (2004)
DOI: 10.1051/0004-6361:200400047


The XMM-Newton observation of GRB 040106: Evidence for an afterglow in a wind environment

B. Gendre, L. Piro and M. De Pasquale

Istituto di Astrofisica Spaziale e Fisica Cosmica/CNR, via fosso del cavaliere, 100, 00133, Roma, Italy
    e-mail: [gendre; piro; depasq]@rm.iasf.cnr.it

(Received 2 July 2004 / Accepted 28 July 2004 )

We present the XMM-Newton observation of GRB 040106. From the X-ray spectral index and temporal decay, we argue that the afterglow is consistent with a fireball expanding in a wind environment. A constant density environment is excluded by the data. This is one of the very few cases in which this conclusion can be drawn.

Key words: gamma-ray burst -- X-ray: general

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© ESO 2004

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