Evidence 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, Jonathan; Ramírez-Ruiz, E.; Patel, S.; Burrows, D. N.; Mangano, V.; Barthelmy, S. D.; Beardmore, A. P.; Campana, S.; Capalbi, M.; Chincarini, G.; Cusumano, G.; Falcone, A.; Gehrels, N.; Giommi, P.; Goad, M. R.; Godet, O.; Hurkett, C. P.; Kennea, J. A.; Moretti, A.; O’Brien, P. T.; Osborne, J. P.; Romano, P.; Tagliaferri, G.; Wells, A. A.

doi:10.1086/500724

articleThe Astrophysical JournalApr 28, 2006GREEN OA

Evidence for a Canonical Gamma‐Ray Burst Afterglow Light Curve in the Swift XRT Data

JAJ. A. Nousek CKC. Kouveliotou DGD. Grupe KLK. L. Page JGJonathan Granot

Pennsylvania State University · Marshall Space Flight Center · +9 more institutions

Indexed inarxivcrossrefdoaj

Abstract

We present new observations of the early X-ray afterglows of the first 27 gamma-ray bursts (GRBs) detected with the Swift X-ray Telescope (XRT). The early X-ray afterglows show a canonical behavior, where the light curve broadly consists of three distinct power law segments: (i) an initial very steep decay (t^{-alpha} with 34, and augments the already severe requirements for the efficiency of the prompt gamma-ray emission.

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Topics & keywords

Topics

Keywords

Afterglow
Physics
Light curve
Astrophysics
Gamma-ray burst
Shock (circulatory)
Power law
Photon

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