No supernovae associated with two long-duration γ-ray bursts

Johan P. U. Fynbo (), Darach Watson, Christina C. Thöne, Jesper Sollerman, Joshua S. Bloom, Tamara M. Davis, Jens Hjorth, Páll Jakobsson, Uffe G. Jørgensen, John F. Graham, Andrew S. Fruchter, David Bersier, Lisa Kewley, Arnaud Cassan, José María Castro Cerón, Suzanne Foley, Javier Gorosabel, Tobias C. Hinse, Keith D. Horne, Brian L. Jensen, Sylvio Klose, Daniel Kocevski, Jean-Baptiste Marquette, Daniel Perley, Enrico Ramirez-Ruiz, Maximilian D. Stritzinger, Paul M. Vreeswijk, Ralph A. M. Wijers, Kristian G. Woller, Dong Xu and Marta Zub
Additional contact information
Johan P. U. Fynbo: Dark Cosmology Centre
Darach Watson: Dark Cosmology Centre
Christina C. Thöne: Dark Cosmology Centre
Jesper Sollerman: Dark Cosmology Centre
Joshua S. Bloom: University of California at Berkeley
Tamara M. Davis: Dark Cosmology Centre
Jens Hjorth: Dark Cosmology Centre
Páll Jakobsson: University of Hertfordshire
Uffe G. Jørgensen: Niels Bohr Institute, University of Copenhagen
John F. Graham: Space Telescope Science Institute
Andrew S. Fruchter: Space Telescope Science Institute
David Bersier: Astrophysics Research Institute, Liverpool John Moores University
Lisa Kewley: University of Hawaii, Institute of Astronomy
Arnaud Cassan: Astronomisches Rechen-Institut (ARI), Zentrum für Astronomie der Universität Heidelberg (ZAH)
José María Castro Cerón: Dark Cosmology Centre
Suzanne Foley: University College Dublin
Javier Gorosabel: Instituto de Astrofísica de Andalucía (CSIC), Apartado de Correos
Tobias C. Hinse: Niels Bohr Institute, University of Copenhagen
Keith D. Horne: University of St Andrews
Brian L. Jensen: Dark Cosmology Centre
Sylvio Klose: Thüringer Landessternwarte Tautenburg
Daniel Kocevski: University of California at Berkeley
Jean-Baptiste Marquette: Université Pierre et Marie Curie
Daniel Perley: University of California at Berkeley
Enrico Ramirez-Ruiz: Institute for Advanced Study
Maximilian D. Stritzinger: Dark Cosmology Centre
Paul M. Vreeswijk: European Southern Observatory
Ralph A. M. Wijers: University of Amsterdam
Kristian G. Woller: Niels Bohr Institute, University of Copenhagen
Dong Xu: Dark Cosmology Centre
Marta Zub: Astronomisches Rechen-Institut (ARI), Zentrum für Astronomie der Universität Heidelberg (ZAH)

Nature, 2006, vol. 444, issue 7122, 1047-1049

Abstract: The long and the short of it The tidy classification system that divided γ-ray bursts (GRBs) into long-duration busts (lasting more than two seconds) and short may have had its day. The final nail in its coffin may be GRB 060614. Discovered on 14 June 2006 by the Burst Alert Telescope on-board the Swift satellite, this burst was long, at 102 seconds, but as reported in a clutch of papers in this issue, it has a number of properties, including the absence of an accompanying supernova, that were previously considered diagnostic of a 'short' GRB. The hunt is now on for a classification system to take account of the diversity now apparent in GRBs. In the accompanying News & Views, Bing Zhang suggests that the answer may be to adopt a Type I/Type II classification similar to that used for supernovae.

Date: 2006
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DOI: 10.1038/nature05375

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