The optical afterglow of the short γ-ray burst GRB 050709
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- 1 October 2005
- journal article
- letter
- Published by Springer Nature in Nature
- Vol. 437 (7060) , 859-861
- https://doi.org/10.1038/nature04174
Abstract
It has long been known that there are two classes1 of γ-ray bursts (GRBs), mainly distinguished by their durations. The breakthrough in our understanding of long-duration GRBs (those lasting more than ∼ 2 s), which ultimately linked them with energetic type Ic supernovae2,3,4, came from the discovery of their long-lived X-ray5 and optical6,7 ‘afterglows’, when precise and rapid localizations of the sources could finally be obtained. X-ray localizations have recently become available8,9 for short (duration 10 afterglow properties 34 h after the GRB are reminiscent of the afterglows of long GRBs, which are attributable to synchrotron emission from ultrarelativistic ejecta. We did not, however, detect a supernova, as found in most nearby long GRB afterglows, which suggests a different origin for the short GRBs.Keywords
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