A novel explosive process is required for the γ-ray burst GRB 060614

A. Gal-Yam, D. B. Fox, P. A. Price, E. O. Ofek, M. R. Davis, D. C. Leonard, A. M. Soderberg, B. P. Schmidt, K. M. Lewis, B. A. Peterson, S. R. Kulkarni, E. Berger, S. B. Cenko, R. Sari, K. Sharon, D. Frail, D. S. Moon, P. J. Brown, A. Cucchiara, F. HarrisonT. Piran, S. E. Persson, P. J. McCarthy, B. E. Penprase, R. A. Chevalier, A. I. MacFadyen

Research output: Contribution to journalArticlepeer-review

347 Scopus citations


Over the past decade, our physical understanding of γ-ray bursts (GRBs) has progressed rapidly, thanks to the discovery and observation of their long-lived afterglow emission. Long-duration (≳2 s) GRBs are associated with the explosive deaths of massive stars ('collapsars', ref. 1), which produce accompanying supernovae; the short-duration (≲2 s) GRBs have a different origin, which has been argued to be the merger of two compact objects. Here we report optical observations of GRB 060614 (duration ∼100 s, ref. 10) that rule out the presence of an associated supernova. This would seem to require a new explosive process: either a massive collapsar that powers a GRB without any associated supernova, or a new type of 'engine', as long-lived as the collapsar but without a massive star. We also show that the properties of the host galaxy (redshift z = 0.125) distinguish it from other long-duration GRB hosts and suggest that an entirely new type of GRB progenitor may be required.

Original languageEnglish (US)
Pages (from-to)1053-1055
Number of pages3
Issue number7122
StatePublished - Dec 21 2006

All Science Journal Classification (ASJC) codes

  • General


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