refreshed shocks from a γ-ray burst

Jonathan Granot, Ehud Nakar () and Tsvi Piran
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Jonathan Granot: Institute for Advanced Study
Ehud Nakar: Racah Institute for Physics, The Hebrew University
Tsvi Piran: Racah Institute for Physics, The Hebrew University

Nature, 2003, vol. 426, issue 6963, 138-139

Abstract: Abstract In addition to its remarkable supernova signature1,2, the γ-ray burst of 29 March 2003 (GRB030329) had two interesting peculiarities: an unusually low-energy output in γ-rays and a large bump in its afterglow light curve after 1–2 days (followed by several less significant rebrightening episodes). We suggest that refreshed shocks — slow shells ejected from the source that catch up with the afterglow shock a relatively long time after the initial burst — produced the observed fluctuations in the early afterglow light curve and explain the low-energy output at early times.

Date: 2003
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DOI: 10.1038/426138a

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