The early afterglow of GRB 190829A

S. Dichiara; E. Troja; V. Lipunov; R. Ricci; S. R. Oates; N. R. Butler; E. Liuzzo; G. Ryan; B. O'Connor; S. B. Cenko; R. G. Cosentino; A. Y. Lien; E. Gorbovsk; N. Tyurina; P. Balanutsa; D. Vlasenko; I. Gorbunov; R. Podesta; F. Podesta; R. Rebolo; M. Serra; D. A.H. Buckley

doi:10.1093/mnras/stac454

The early afterglow of GRB 190829A

S. Dichiara, E. Troja, V. Lipunov, R. Ricci, S. R. Oates, N. R. Butler, E. Liuzzo, G. Ryan, B. O'Connor, S. B. Cenko, R. G. Cosentino, A. Y. Lien, E. Gorbovsk, N. Tyurina, P. Balanutsa, D. Vlasenko, I. Gorbunov, R. Podesta, F. Podesta, R. ReboloM. Serra, D. A.H. Buckley

Earth and Space Exploration, School of (SESE)

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

GRB 190829A at z = 0.0785 is the fourth closest long GRB ever detected by the Neil Gehrels Swift observatory, and the third confirmed case with a very high-energy component. We present our multiwavelength analysis of this rare event, focusing on its early stages of evolution, and including data from Swift, the MASTER global network of optical telescopes, ALMA, and ATCA. We report sensitive limits on the linear polarization of the optical emission, disfavouring models of off-axis jets to explain the delayed afterglow peak. The study of the multiwavelength light curves and broad-band spectra supports a model with at least two emission components: a bright reverse shock emission, visible at early times in the optical and X-rays and, later, in the radio band; and a forward shock component dominating at later times and lower radio frequencies. A combined study of the prompt and afterglow properties shows many similarities with cosmological long GRBs, suggesting that GRB 190829A is an example of classical GRBs in the nearby universe.

Original language	English (US)
Pages (from-to)	2337-2349
Number of pages	13
Journal	Monthly Notices of the Royal Astronomical Society
Volume	512
Issue number	2
DOIs	https://doi.org/10.1093/mnras/stac454
State	Published - May 1 2022

Keywords

gamma-ray burst: general
gamma-ray burst: individual: (GRB190829A)
radiation mechanisms: non-thermal

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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Dichiara, S., Troja, E., Lipunov, V., Ricci, R., Oates, S. R., Butler, N. R., Liuzzo, E., Ryan, G., O'Connor, B., Cenko, S. B., Cosentino, R. G., Lien, A. Y., Gorbovsk, E., Tyurina, N., Balanutsa, P., Vlasenko, D., Gorbunov, I., Podesta, R., Podesta, F., ... Buckley, D. A. H. (2022). The early afterglow of GRB 190829A. Monthly Notices of the Royal Astronomical Society, 512(2), 2337-2349. https://doi.org/10.1093/mnras/stac454

Dichiara, S, Troja, E, Lipunov, V, Ricci, R, Oates, SR, Butler, NR, Liuzzo, E, Ryan, G, O'Connor, B, Cenko, SB, Cosentino, RG, Lien, AY, Gorbovsk, E, Tyurina, N, Balanutsa, P, Vlasenko, D, Gorbunov, I, Podesta, R, Podesta, F, Rebolo, R, Serra, M & Buckley, DAH 2022, 'The early afterglow of GRB 190829A', Monthly Notices of the Royal Astronomical Society, vol. 512, no. 2, pp. 2337-2349. https://doi.org/10.1093/mnras/stac454

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abstract = "GRB 190829A at z = 0.0785 is the fourth closest long GRB ever detected by the Neil Gehrels Swift observatory, and the third confirmed case with a very high-energy component. We present our multiwavelength analysis of this rare event, focusing on its early stages of evolution, and including data from Swift, the MASTER global network of optical telescopes, ALMA, and ATCA. We report sensitive limits on the linear polarization of the optical emission, disfavouring models of off-axis jets to explain the delayed afterglow peak. The study of the multiwavelength light curves and broad-band spectra supports a model with at least two emission components: a bright reverse shock emission, visible at early times in the optical and X-rays and, later, in the radio band; and a forward shock component dominating at later times and lower radio frequencies. A combined study of the prompt and afterglow properties shows many similarities with cosmological long GRBs, suggesting that GRB 190829A is an example of classical GRBs in the nearby universe.",

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T1 - The early afterglow of GRB 190829A

AU - Dichiara, S.

AU - Troja, E.

AU - Lipunov, V.

AU - Ricci, R.

AU - Oates, S. R.

AU - Butler, N. R.

AU - Liuzzo, E.

AU - Ryan, G.

AU - O'Connor, B.

AU - Cenko, S. B.

AU - Cosentino, R. G.

AU - Lien, A. Y.

AU - Gorbovsk, E.

AU - Tyurina, N.

AU - Balanutsa, P.

AU - Vlasenko, D.

AU - Gorbunov, I.

AU - Podesta, R.

AU - Podesta, F.

AU - Rebolo, R.

AU - Serra, M.

AU - Buckley, D. A.H.

PY - 2022/5/1

Y1 - 2022/5/1

N2 - GRB 190829A at z = 0.0785 is the fourth closest long GRB ever detected by the Neil Gehrels Swift observatory, and the third confirmed case with a very high-energy component. We present our multiwavelength analysis of this rare event, focusing on its early stages of evolution, and including data from Swift, the MASTER global network of optical telescopes, ALMA, and ATCA. We report sensitive limits on the linear polarization of the optical emission, disfavouring models of off-axis jets to explain the delayed afterglow peak. The study of the multiwavelength light curves and broad-band spectra supports a model with at least two emission components: a bright reverse shock emission, visible at early times in the optical and X-rays and, later, in the radio band; and a forward shock component dominating at later times and lower radio frequencies. A combined study of the prompt and afterglow properties shows many similarities with cosmological long GRBs, suggesting that GRB 190829A is an example of classical GRBs in the nearby universe.

AB - GRB 190829A at z = 0.0785 is the fourth closest long GRB ever detected by the Neil Gehrels Swift observatory, and the third confirmed case with a very high-energy component. We present our multiwavelength analysis of this rare event, focusing on its early stages of evolution, and including data from Swift, the MASTER global network of optical telescopes, ALMA, and ATCA. We report sensitive limits on the linear polarization of the optical emission, disfavouring models of off-axis jets to explain the delayed afterglow peak. The study of the multiwavelength light curves and broad-band spectra supports a model with at least two emission components: a bright reverse shock emission, visible at early times in the optical and X-rays and, later, in the radio band; and a forward shock component dominating at later times and lower radio frequencies. A combined study of the prompt and afterglow properties shows many similarities with cosmological long GRBs, suggesting that GRB 190829A is an example of classical GRBs in the nearby universe.

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KW - gamma-ray burst: individual: (GRB190829A)

KW - radiation mechanisms: non-thermal

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The early afterglow of GRB 190829A

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