TY - JOUR
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.
N1 - Funding Information:
This work was initiated during the 'Astrophysics in the LIGO/Virgo Era' meeting at the Aspen Center for Physics during Summer 2019. The Aspen Center for Physics is supported by National Science Foun- dation grant PHY-1607611. MASTER is supported by Lomonosov Moscow State University Development programme. VL, EG, and VK were supported by RFBR 19-29-11011 grant. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2018.1.01410.T, ADS/JAO.ALMA#2018.1.01454.T. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile.
Publisher Copyright:
© 2022 The Author(s).
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.
KW - gamma-ray burst: general
KW - gamma-ray burst: individual: (GRB190829A)
KW - radiation mechanisms: non-thermal
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U2 - 10.1093/mnras/stac454
DO - 10.1093/mnras/stac454
M3 - Article
AN - SCOPUS:85128419558
SN - 0035-8711
VL - 512
SP - 2337
EP - 2349
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 2
ER -