X-ray flares in early GRB afterglows

D. N. Burrows; A. Falcone; G. Chincarini; D. Morris; P. Romano; J. E. Hill; O. Godet; A. Moretti; H. Krimm; J. P. Osborne; J. Racusin; V. Mangano; K. Page; M. Perri; M. Stroh

doi:10.1098/rsta.2006.1970

X-ray flares in early GRB afterglows

D. N. Burrows, A. Falcone, G. Chincarini, D. Morris, P. Romano, J. E. Hill, O. Godet, A. Moretti, H. Krimm, J. P. Osborne, J. Racusin, V. Mangano, K. Page, M. Perri, M. Stroh

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Abstract

The Swift X-ray Telescope (XRT) has discovered that flares are quite common in early X-ray afterglows of gamma-ray bursts (GRBs), being observed in roughly 50% of afterglows with prompt follow-up observations. The flares range in fluence from a few per cent to approximately 100% of the fluence of the prompt emission (the GRB). Repetitive flares are seen, with more than four successive flares detected by the XRT in some afterglows. The rise and fall times of the flares are typically considerably smaller than the time since the burst. These characteristics suggest that the flares are related to the prompt emission mechanism, but at lower photon energies. We conclude that the most likely cause of these flares is late-time activity of the GRB central engine.

Original language	English (US)
Pages (from-to)	1213-1226
Number of pages	14
Journal	Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume	365
Issue number	1854
DOIs	https://doi.org/10.1098/rsta.2006.1970
State	Published - May 15 2007

All Science Journal Classification (ASJC) codes

General Mathematics
General Engineering
General Physics and Astronomy

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Burrows, D. N., Falcone, A., Chincarini, G., Morris, D., Romano, P., Hill, J. E., Godet, O., Moretti, A., Krimm, H., Osborne, J. P., Racusin, J., Mangano, V., Page, K., Perri, M., & Stroh, M. (2007). X-ray flares in early GRB afterglows. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 365(1854), 1213-1226. https://doi.org/10.1098/rsta.2006.1970

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title = "X-ray flares in early GRB afterglows",

abstract = "The Swift X-ray Telescope (XRT) has discovered that flares are quite common in early X-ray afterglows of gamma-ray bursts (GRBs), being observed in roughly 50% of afterglows with prompt follow-up observations. The flares range in fluence from a few per cent to approximately 100% of the fluence of the prompt emission (the GRB). Repetitive flares are seen, with more than four successive flares detected by the XRT in some afterglows. The rise and fall times of the flares are typically considerably smaller than the time since the burst. These characteristics suggest that the flares are related to the prompt emission mechanism, but at lower photon energies. We conclude that the most likely cause of these flares is late-time activity of the GRB central engine.",

author = "Burrows, {D. N.} and A. Falcone and G. Chincarini and D. Morris and P. Romano and Hill, {J. E.} and O. Godet and A. Moretti and H. Krimm and Osborne, {J. P.} and J. Racusin and V. Mangano and K. Page and M. Perri and M. Stroh",

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Burrows, DN, Falcone, A, Chincarini, G, Morris, D, Romano, P, Hill, JE, Godet, O, Moretti, A, Krimm, H, Osborne, JP, Racusin, J, Mangano, V, Page, K, Perri, M & Stroh, M 2007, 'X-ray flares in early GRB afterglows', Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol. 365, no. 1854, pp. 1213-1226. https://doi.org/10.1098/rsta.2006.1970

TY - JOUR

T1 - X-ray flares in early GRB afterglows

AU - Burrows, D. N.

AU - Falcone, A.

AU - Chincarini, G.

AU - Morris, D.

AU - Romano, P.

AU - Hill, J. E.

AU - Godet, O.

AU - Moretti, A.

AU - Krimm, H.

AU - Osborne, J. P.

AU - Racusin, J.

AU - Mangano, V.

AU - Page, K.

AU - Perri, M.

AU - Stroh, M.

PY - 2007/5/15

Y1 - 2007/5/15

N2 - The Swift X-ray Telescope (XRT) has discovered that flares are quite common in early X-ray afterglows of gamma-ray bursts (GRBs), being observed in roughly 50% of afterglows with prompt follow-up observations. The flares range in fluence from a few per cent to approximately 100% of the fluence of the prompt emission (the GRB). Repetitive flares are seen, with more than four successive flares detected by the XRT in some afterglows. The rise and fall times of the flares are typically considerably smaller than the time since the burst. These characteristics suggest that the flares are related to the prompt emission mechanism, but at lower photon energies. We conclude that the most likely cause of these flares is late-time activity of the GRB central engine.

AB - The Swift X-ray Telescope (XRT) has discovered that flares are quite common in early X-ray afterglows of gamma-ray bursts (GRBs), being observed in roughly 50% of afterglows with prompt follow-up observations. The flares range in fluence from a few per cent to approximately 100% of the fluence of the prompt emission (the GRB). Repetitive flares are seen, with more than four successive flares detected by the XRT in some afterglows. The rise and fall times of the flares are typically considerably smaller than the time since the burst. These characteristics suggest that the flares are related to the prompt emission mechanism, but at lower photon energies. We conclude that the most likely cause of these flares is late-time activity of the GRB central engine.

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ER -

X-ray flares in early GRB afterglows

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