A very energetic supernova associated with the gamma-ray burst of 29 March 2003 |
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Authors: | Hjorth Jens Sollerman Jesper Møller Palle Fynbo Johan P U Woosley Stan E Kouveliotou Chryssa Tanvir Nial R Greiner Jochen Andersen Michael I Castro-Tirado Alberto J Castro Cerón José María Fruchter Andrew S Gorosabel Javier Jakobsson Páll Kaper Lex Klose Sylvio Masetti Nicola Pedersen Holger Pedersen Kristian Pian Elena Palazzi Eliana Rhoads James E Rol Evert van den Heuvel Edward P J Vreeswijk Paul M Watson Darach Wijers Ralph A M J |
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Affiliation: | Astronomical Observatory, NBIfAFG, University of Copenhagen, Juliane Maries Vej, DK-2100 Copenhagen ?, Denmark. jens@astro.ku.dk |
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Abstract: | Over the past five years evidence has mounted that long-duration (>2 s) gamma-ray bursts (GRBs)-the most luminous 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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