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Low frequency view of GRB 190114C reveals time varying shock micro-physics

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dc.contributor.author Misra, K
dc.contributor.author Resmi, L
dc.contributor.author Kann, D. A
dc.contributor.author Marongiu, M
dc.contributor.author Moin, A
dc.contributor.author Klose, S
dc.contributor.author Bernardi, G
dc.contributor.author de Ugarte Postigo, A
dc.contributor.author Jaiswal, V. K
dc.contributor.author Schulze, S
dc.contributor.author Perley, D. A
dc.contributor.author Ghosh, A
dc.contributor.author Dimple
dc.contributor.author Kumar, H
dc.contributor.author Gupta, R
dc.contributor.author Michałowski, M. J
dc.contributor.author Martin, S
dc.contributor.author Cockeram, A
dc.contributor.author Cherukuri, S. V
dc.contributor.author Bhalerao, V
dc.contributor.author Anderson, G. E
dc.contributor.author Pandey, S. B
dc.contributor.author Anupama, G. C
dc.contributor.author Thone, C. C
dc.contributor.author Barway, Sudhanshu
dc.contributor.author Wieringa, M. H
dc.contributor.author Fynbo, J. P. U
dc.contributor.author Habeeb, N
dc.date.accessioned 2021-07-23T06:04:15Z
dc.date.available 2021-07-23T06:04:15Z
dc.date.issued 2021-07
dc.identifier.citation Monthly Notices of the Royal Astronomical Society, Vol. 504, No. 4, pp. 5685–5701 en_US
dc.identifier.issn 1365-2966
dc.identifier.uri http://hdl.handle.net/2248/7818
dc.description Restricted Access en_US
dc.description.abstract We present radio and optical afterglow observations of the TeV-bright long gamma-ray burst 190114C at a redshift of z = 0.425, which was detected by the Major Atmospheric Gamma Imaging Cherenkov telescope. Our observations with Atacama Large Millimeter/submillitmeter Array, Australia Telescope Compact Array, and upgraded Giant Metre-wave Radio Telescope were obtained by our low frequency observing campaign and range from ∼1 to ∼140 d after the burst and the optical observations were done with three optical telescopes spanning up to ∼25 d after the burst. Long-term radio/mm observations reveal the complex nature of the afterglow, which does not follow the spectral and temporal closure relations expected from the standard afterglow model. We find that the microphysical parameters of the external forward shock, representing the share of shock-created energy in the non-thermal electron population and magnetic field, are evolving with time. The inferred kinetic energy in the blast-wave depends strongly on the assumed ambient medium density profile, with a constant density medium demanding almost an order of magnitude higher energy than in the prompt emission, while a stellar wind-driven medium requires approximately the same amount energy as in prompt emission. en_US
dc.language.iso en en_US
dc.publisher Oxford University Press on behalf of the Royal Astronomical Society en_US
dc.relation.uri https://doi.org/10.1093/mnras/stab1050
dc.rights © The Royal Astronomical Society
dc.subject Gamma-ray burst en_US
dc.subject General - gamma-ray burst en_US
dc.subject Individual - GRB 190114C en_US
dc.subject Radio observations en_US
dc.title Low frequency view of GRB 190114C reveals time varying shock micro-physics en_US
dc.type Article en_US


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