Bright X-ray Flares in Gamma-Ray Burst Afterglows

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 after...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 2005-09, Vol.309 (5742), p.1833-1835
Hauptverfasser:	Burrows, D. N., Romano, P., Falcone, A., Kobayashi, S., Zhang, B., Moretti, A., O'Brien, P. T., Goad, M. R., Campana, S., Page, K. L., Angelini, L., Barthelmy, S., Beardmore, A. P., Capalbi, M., Chincarini, G., Cummings, J., Cusumano, G., Fox, D., Giommi, P., Hill, J. E., Kennea, J. A., Krimm, H., Mangano, V., Marshall, F., Mészáros, P., Morris, D. C., Nousek, J. A., Osborne, J. P., Pagani, C., Perri, M., Tagliaferri, G., Wells, A. A., Woosley, S., Gehrels, N.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy Astrophysics Cosmic rays Earth, ocean, space Energy Engines Exact sciences and technology Explosions Gamma ray bursts Gamma rays Gamma-ray sources gamma-ray bursts Ionization afterglow Light Light curves Pollutant emissions Solar flares Spectral bands Stellar flares Stellar systems. Galactic and extragalactic objects and systems. The universe Unidentified sources and radiation outside the solar system X ray flares X ray observatories X-rays
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Beschreibung
Zusammenfassung:	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.
ISSN:	0036-8075 1095-9203
DOI:	10.1126/science.1116168