Structure in the early afterglow lightcurve of the gamma-ray burst of 29 March 2003

Details Structure in the early afterglow lightcurve of the gamma-ray burst of 29 March 2003 Structure in the early afterglow lightcurve of the gamma-ray burst of 29 March 2003

2003-06-19

arxiv.org/abs/astro-ph/0306396v1

Astronomy and Astrophysics

Astrophysics

8 pages, 1 figure, To appear in Nature June 19 issue. For the access to the data in the paper, see http://vsnet.kusastro.kyo

Scientific paper

Gamma-ray bursts (GRBs) are energetic explosions that for 0.01--100 s are the brightest gamma-ray sources in the sky. Observations of the early evolution of afterglows we expected to provide clues about the nature of the bursts, but their rapid fading has hampered such studies; some recent rapid localizations of bursts have improved the situation. Here we report on an early detection of the very bright afterglow of the burst of 29 March 2003 (GRB030329). Our data show that, even early in the aferglow phase, the light curve shows unexpectedly complicated structures superimposed on the fading background.

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