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Published September 16, 2005 | Version Supplemental Material
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Bright X-ray Flares in Gamma-Ray Burst Afterglows

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Abstract

Gamma-ray burst (GRB) afterglows have provided important clues to the nature of these massive explosive events, providing direct information on the nearby environment and indirect information on the central engine that powers the burst. We report the discovery of two bright x-ray flares in GRB afterglows, including a giant flare comparable in total energy to the burst itself, each peaking minutes after the burst. These strong, rapid x-ray flares imply that the central engines of the bursts have long periods of activity, with strong internal shocks continuing for hundreds of seconds after the gamma-ray emission has ended.

Additional Information

© 2005 American Association for the Advancement of Science. Received 15 June 2005; accepted 29 July 2005; Published online 18 August 2005. This letter is based on observations with the NASA Swift gamma-ray burst Explorer. We thank the Swift operations team for their support. The authors acknowledge support from NASA in the United States, ASI in Italy, and Particle Physics and Astronomy Research Council. in the UK.

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Eprint ID
52038
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CaltechAUTHORS:20141121-101722140

Funding

NASA
ASI (Italy)
Particle Physics and Astronomy Research Council (PPARC)

Dates

Created
2014-11-21
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Updated
2021-11-10
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