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News and Views
Nature 444, 1010-1011 (21 December 2006) | doi:10.1038/4441010a; Published online 21 December 2006
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CERC in Developmental Immunology and Immunosenescence
- Dalhousie University
- Halifax, Nova Scotia
Associate Scientist (90%)
- Philip Morris International (PMI)
- Neuchatel, Switzerland
Astrophysics: A burst of new ideas
Bing Zhang1
Abstract
Gigantic cosmological 
-ray bursts have fallen into a dichotomy of long and short bursts, each with a very different origin. The discovery of an oddball burst calls for a rethink of that classification.
The events known as -ray bursts (GRBs) are the most violent and luminous explosions observed in the Universe. In the early 1990s, it became clear that they come in two distinct flavours: longer-duration bursts, typically longer than 2 seconds, with a spectrum of emitted radiation that peaks at lower ('softer') energy; and shorter-duration bursts with a more energetic, 'harder' spectrum1.
- Bing Zhang is in the Department of Physics and Astronomy, University of Nevada, 4505 Maryland Parkway, Las Vegas, Nevada 89154-4002, USA.
Email: bzhang@physics.unlv.edu
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