Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-06-22
Astron.J.133:1187-1192,2007
Astronomy and Astrophysics
Astrophysics
The Astronomical Journal, in press; revised version, including the comments of the referee (one figure added, text restructure
Scientific paper
10.1086/511066
With a redshift of z=6.295, GRB 050904 is the most distant gamma-ray burst ever discovered. It was an energetic event at all wavelengths and the afterglow was observed in detail in the near-infrared bands. We gathered all available optical and NIR afterglow photometry of this GRB to construct a composite NIR light curve spanning several decades in time and flux density. Transforming the NIR light curve into the optical, we find that the afterglow of GRB 050904 was more luminous at early times than any other GRB afterglow in the pre-\emph{Swift} era, making it at these wavelengths the most luminous transient ever detected. Given the intrinsic properties of GRB 050904 and its afterglow, we discuss if this burst is markedly different from other GRBs at lower redshifts.
Kann David Alexander
Klose Sylvio
Masetti Nicola
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