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arxiv: astro-ph/0306347 · v1 · submitted 2003-06-17 · 🌌 astro-ph

A very energetic supernova associated with the gamma-ray burst of 29 March 2003

Jens Hjorth , Jesper Sollerman , Palle M{\o}ller , Johan P. U. Fynbo , Stan E. Woosley , Chryssa Kouveliotou , Nial R. Tanvir , Jochen Greiner
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Michael I. Andersen Alberto J. Castro-Tirado Jos\'e Mar\'ia Castro Cer\'on Andrew S. Fruchter Javier Gorosabel P\'all Jakobsson Lex Kaper Sylvio Klose Nicola Masetti Holger Pedersen Kristian Pedersen Elena Pian Eliana Palazzi James E. Rhoads Evert Rol Edward P. J. van den Heuvel Paul M. Vreeswijk Darach Watson Ralph A. M. J. Wijers
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classification 🌌 astro-ph
keywords grbssupernovaevidencemassiveassociatedassociationburstscollapse
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Over the past five years evidence has mounted that long-duration (> 2 s) gamma-ray bursts (GRBs)--the most brilliant of all astronomical explosions--signal the collapse of massive stars in our Universe. This evidence was originally based on the probable association of one unusual GRB with a supernova, but now includes the association of GRBs with regions of massive star formation in distant galaxies, the appearance of supernova-like 'bumps' in the optical afterglow light curves of several bursts and lines of freshly synthesized elements in the spectra of a few X-ray afterglows. These observations support, but do not yet conclusively demonstrate, the idea that long-duration GRBs are associated with the deaths of massive stars, presumably arising from core collapse. Here we report evidence that a very energetic supernova (a hypernova) was temporally and spatially coincident with a GRB at redshift z = 0.1685. The timing of the supernova indicates that it exploded within a few days of the GRB, strongly suggesting that core-collapse events can give rise to GRBs, thereby favouring the 'collapsar' model.

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