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An unexpectedly rapid decline in the X-ray afterglow emission of long γ-ray bursts
Open accessAbstract
‘Long’ γ-ray bursts (GRBs) are commonly accepted to originate in the explosion of particularly massive stars, which give rise to highly relativistic jets. Inhomogeneities in the expanding flow result in internal shock waves that are believed to produce the γ-rays we see. As the jet travels further outward into the surrounding circumstellar medium, ‘external’ shocks create the afterglow emission seen in the X-ray, optical and radio bands. Here we report observations of the early phases of the X-ray emission of five GRBs. Their X-ray light curves are characterised by a surprisingly rapid fall-off for the first few hundred seconds, followed by a less rapid decline lasting several hours. This steep decline, together with detailed spectral properties of two particular bursts, shows that violent shock interactions take place in the early jet outflows.
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Cited by
Zhang, B., Fan, Y. Z., Dyks, J., Kobayashi, S., Meszaros, P., Burrows, D. N., Nousek, J. A., & Gehrels, N. (2006) · The Astrophysical Journal · doi:10.1086/500723 · Cited by 1,079
“Tagliaferri et al. (2005) explored the t0 effect and concluded that the two distinct light-curve segments are likely intrinsic rather than due to a poor choice of t0.”
BackgroundInfluentialSelf-citationThe physics of gamma-ray bursts & relativistic jets
Kumar, P., & Zhang, B. (2015) · Physics Reports · doi:10.1016/j.physrep.2014.09.008 · Cited by 952
Self-citationEvidence for a Canonical Gamma‐Ray Burst Afterglow Light Curve in the Swift XRT Data
Nousek, J. A., Kouveliotou, C., Grupe, D., Page, K. L., Granot, J., Ramirez‐Ruiz, E., Patel, S. K., Burrows, D. N., Mangano, V., Barthelmy, S., et al. (2006) · The Astrophysical Journal · doi:10.1086/500724 · Cited by 886
Self-citationThe association of GRB 060218 with a supernova and the evolution of the shock wave
Campana, S., Mangano, V., Blustin, A. J., Brown, P., Burrows, D. N., Chincarini, G., Cummings, J. R., Cusumano, G., Valle, M. D., Malesani, D., et al. (2006) · Nature · doi:10.1038/nature04892 · Cited by 785
Self-citationGamma-Ray Bursts in the Swift Era
Gehrels, N., Ramirez-Ruiz, E., & Fox, D. B. (2009) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.46.060407.145147 · Cited by 615
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Metadata
- Authors
- Tagliaferri, G., Goad, M., Chincarini, G., Moretti, A., Campana, S., Burrows, D. N., Perri, M., Barthelmy, S. D., Gehrels, N., Krimm, H., Sakamoto, T., Kumar, P., Mészáros, P. I., Kobayashi, S., Zhang, B., Angelini, L., Banat, P., Beardmore, A. P., Capalbi, M., Covino, S., Cusumano, G., Giommi, P., Godet, O., Hill, J. E., Kennea, J. A., Mangano, V., Morris, D. C., Nousek, J. A., O'Brien, P. T., Osborne, J. P., Pagani, C., Page, K. L., Romano, P., Stella, L., & Wells, A.
- Venue
- Nature
- Published
- 2005-08
- Volume
- 436
- Issue
- 7053
- Pages
- 985-988
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W2037092020
- Cited by
- 256
- References
- 0
- FWCI
- 22.45
- Type
- journal article
- Language
- en
- Open access
- green
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- Tagliaferri, G., Goad, M., Chincarini, G., Moretti, A., Campana, S., Burrows, D. N., Perri, M., Barthelmy, S. D., Gehrels, N., Krimm, H., Sakamoto, T., Kumar, P., Mészáros, P. I., Kobayashi, S., Zhang, B., Angelini, L., Banat, P., Beardmore, A. P., Capalbi, M., . . . Wells, A. (2005). An unexpectedly rapid decline in the X-ray afterglow emission of long γ-ray bursts. Nature. https://doi.org/10.1038/nature03934
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