NuSTAR observations of GRB 130427A establish a single component synchrotron afterglow origin for the late optical to multi-gev emission

C. Kouveliotou; J. Granot; J. L. Racusin; E. Bellm; G. Vianello; S. Oates; C. L. Fryer; S. E. Boggs; F. E. Christensen; W. W. Craig; C. D. Dermer; N. Gehrels; C. J. Hailey; F. A. Harrison; A. Melandri; J. E. McEnery; C. G. Mundell; D. K. Stern; G. Tagliaferri; W. W. Zhang

doi:10.1088/2041-8205/779/1/L1

NuSTAR observations of GRB 130427A establish a single component synchrotron afterglow origin for the late optical to multi-gev emission

C. Kouveliotou, J. Granot, J. L. Racusin, E. Bellm, G. Vianello, S. Oates, C. L. Fryer, S. E. Boggs, F. E. Christensen, W. W. Craig, C. D. Dermer, N. Gehrels, C. J. Hailey, F. A. Harrison, A. Melandri, J. E. McEnery, C. G. Mundell, D. K. Stern, G. Tagliaferri, W. W. Zhang

Department of Physics

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78 Citations (SciVal)

Abstract

GRB 130427A occurred in a relatively nearby galaxy; its prompt emission had the largest GRB fluence ever recorded. The afterglow of GRB 130427A was bright enough for the Nuclear Spectroscopic Telescope ARray (NuSTAR) to observe it in the 3-79 keV energy range long after its prompt emission (∼1.5 and 5 days). This range, where afterglow observations were previously not possible, bridges an important spectral gap. Combined with Swift, Fermi, and ground-based optical data, NuSTAR observations unambiguously establish a single afterglow spectral component from optical to multi-GeV energies a day after the event, which is almost certainly synchrotron radiation. Such an origin of the late-time Fermi/Large Area Telescope >10 GeV photons requires revisions in our understanding of collisionless relativistic shock physics.

Original language	English
Article number	L1
Journal	Astrophysical Journal Letters
Volume	779
Issue number	1
DOIs	https://doi.org/10.1088/2041-8205/779/1/L1
Publication status	Published - 10 Dec 2013

Keywords

acceleration of particles
gamma-ray burst: individual (GRB 130427A)
magnetic fields
radiation mechanisms: non-thermal
shock waves

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/2041-8205/779/1/L1

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Kouveliotou, C., Granot, J., Racusin, J. L., Bellm, E., Vianello, G., Oates, S., Fryer, C. L., Boggs, S. E., Christensen, F. E., Craig, W. W., Dermer, C. D., Gehrels, N., Hailey, C. J., Harrison, F. A., Melandri, A., McEnery, J. E., Mundell, C. G., Stern, D. K., Tagliaferri, G., & Zhang, W. W. (2013). NuSTAR observations of GRB 130427A establish a single component synchrotron afterglow origin for the late optical to multi-gev emission. Astrophysical Journal Letters, 779(1), Article L1. https://doi.org/10.1088/2041-8205/779/1/L1

Kouveliotou, C, Granot, J, Racusin, JL, Bellm, E, Vianello, G, Oates, S, Fryer, CL, Boggs, SE, Christensen, FE, Craig, WW, Dermer, CD, Gehrels, N, Hailey, CJ, Harrison, FA, Melandri, A, McEnery, JE, Mundell, CG, Stern, DK, Tagliaferri, G & Zhang, WW 2013, 'NuSTAR observations of GRB 130427A establish a single component synchrotron afterglow origin for the late optical to multi-gev emission', Astrophysical Journal Letters, vol. 779, no. 1, L1. https://doi.org/10.1088/2041-8205/779/1/L1

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title = "NuSTAR observations of GRB 130427A establish a single component synchrotron afterglow origin for the late optical to multi-gev emission",

abstract = "GRB 130427A occurred in a relatively nearby galaxy; its prompt emission had the largest GRB fluence ever recorded. The afterglow of GRB 130427A was bright enough for the Nuclear Spectroscopic Telescope ARray (NuSTAR) to observe it in the 3-79 keV energy range long after its prompt emission (∼1.5 and 5 days). This range, where afterglow observations were previously not possible, bridges an important spectral gap. Combined with Swift, Fermi, and ground-based optical data, NuSTAR observations unambiguously establish a single afterglow spectral component from optical to multi-GeV energies a day after the event, which is almost certainly synchrotron radiation. Such an origin of the late-time Fermi/Large Area Telescope >10 GeV photons requires revisions in our understanding of collisionless relativistic shock physics.",

keywords = "acceleration of particles, gamma-ray burst: individual (GRB 130427A), magnetic fields, radiation mechanisms: non-thermal, shock waves",

author = "C. Kouveliotou and J. Granot and Racusin, {J. L.} and E. Bellm and G. Vianello and S. Oates and Fryer, {C. L.} and Boggs, {S. E.} and Christensen, {F. E.} and Craig, {W. W.} and Dermer, {C. D.} and N. Gehrels and Hailey, {C. J.} and Harrison, {F. A.} and A. Melandri and McEnery, {J. E.} and Mundell, {C. G.} and Stern, {D. K.} and G. Tagliaferri and Zhang, {W. W.}",

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AU - Kouveliotou, C.

AU - Granot, J.

AU - Racusin, J. L.

AU - Bellm, E.

AU - Vianello, G.

AU - Oates, S.

AU - Fryer, C. L.

AU - Boggs, S. E.

AU - Christensen, F. E.

AU - Craig, W. W.

AU - Dermer, C. D.

AU - Gehrels, N.

AU - Hailey, C. J.

AU - Harrison, F. A.

AU - Melandri, A.

AU - McEnery, J. E.

AU - Mundell, C. G.

AU - Stern, D. K.

AU - Tagliaferri, G.

AU - Zhang, W. W.

PY - 2013/12/10

Y1 - 2013/12/10

N2 - GRB 130427A occurred in a relatively nearby galaxy; its prompt emission had the largest GRB fluence ever recorded. The afterglow of GRB 130427A was bright enough for the Nuclear Spectroscopic Telescope ARray (NuSTAR) to observe it in the 3-79 keV energy range long after its prompt emission (∼1.5 and 5 days). This range, where afterglow observations were previously not possible, bridges an important spectral gap. Combined with Swift, Fermi, and ground-based optical data, NuSTAR observations unambiguously establish a single afterglow spectral component from optical to multi-GeV energies a day after the event, which is almost certainly synchrotron radiation. Such an origin of the late-time Fermi/Large Area Telescope >10 GeV photons requires revisions in our understanding of collisionless relativistic shock physics.

AB - GRB 130427A occurred in a relatively nearby galaxy; its prompt emission had the largest GRB fluence ever recorded. The afterglow of GRB 130427A was bright enough for the Nuclear Spectroscopic Telescope ARray (NuSTAR) to observe it in the 3-79 keV energy range long after its prompt emission (∼1.5 and 5 days). This range, where afterglow observations were previously not possible, bridges an important spectral gap. Combined with Swift, Fermi, and ground-based optical data, NuSTAR observations unambiguously establish a single afterglow spectral component from optical to multi-GeV energies a day after the event, which is almost certainly synchrotron radiation. Such an origin of the late-time Fermi/Large Area Telescope >10 GeV photons requires revisions in our understanding of collisionless relativistic shock physics.

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KW - gamma-ray burst: individual (GRB 130427A)

KW - magnetic fields

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KW - shock waves

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NuSTAR observations of GRB 130427A establish a single component synchrotron afterglow origin for the late optical to multi-gev emission

Abstract

Keywords

ASJC Scopus subject areas

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