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Simultaneous radio and optical polarimetry of GRB 191221B afterglow

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Simultaneous radio and optical polarimetry of GRB 191221B afterglow. / Urata, Y.; Toma, K.; Covino, S. et al.
In: Nature Astronomy, Vol. 7, 08.12.2022, p. 80-87.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Urata, Y, Toma, K, Covino, S, Wiersema, K, Huang, K, Shimoda, J, Kuwata, A, Nagao, S, Asada, K, Nagai, H, Takahashi, S, Chung, C-E, Petitpas, G, Yamaoka, K, Izzo, L, Fynbo, J, de Ugarte Postigo, A, Arabsalmani, M & Tashiro, M 2022, 'Simultaneous radio and optical polarimetry of GRB 191221B afterglow', Nature Astronomy, vol. 7, pp. 80-87. https://doi.org/10.1038/s41550-022-01832-7

APA

Urata, Y., Toma, K., Covino, S., Wiersema, K., Huang, K., Shimoda, J., Kuwata, A., Nagao, S., Asada, K., Nagai, H., Takahashi, S., Chung, C.-E., Petitpas, G., Yamaoka, K., Izzo, L., Fynbo, J., de Ugarte Postigo, A., Arabsalmani, M., & Tashiro, M. (2022). Simultaneous radio and optical polarimetry of GRB 191221B afterglow. Nature Astronomy, 7, 80-87. https://doi.org/10.1038/s41550-022-01832-7

Vancouver

Urata Y, Toma K, Covino S, Wiersema K, Huang K, Shimoda J et al. Simultaneous radio and optical polarimetry of GRB 191221B afterglow. Nature Astronomy. 2022 Dec 8;7:80-87. doi: 10.1038/s41550-022-01832-7

Author

Urata, Y. ; Toma, K. ; Covino, S. et al. / Simultaneous radio and optical polarimetry of GRB 191221B afterglow. In: Nature Astronomy. 2022 ; Vol. 7. pp. 80-87.

Bibtex

@article{f512e7cb4b2d457ba116ef07214986ca,
title = "Simultaneous radio and optical polarimetry of GRB 191221B afterglow",
abstract = "Gamma-ray bursts (GRBs) are the most luminous transients in the universe and are utilized as probes of early stars, gravitational wave counterparts and collisionless shock physics. In spite of studies on polarimetry of GRBs in individual wavelengths that characterized intriguing properties of prompt emission and afterglow, no coordinated multi-wavelength measurements have yet been performed. Here we report the first coordinated simultaneous polarimetry in the optical and radio bands for the afterglow associated with the typical long GRB 191221B. Our observations successfully caught the radio emission, which is not affected by synchrotron self-absorption, and show that the emission is depolarized in the radio band compared with the optical one. Our simultaneous polarization angle measurement and temporal polarization monitoring indicate the existence of cool electrons that increase the estimate of jet kinetic energy by a factor of more than 4 for this GRB afterglow. Further coordinated multi-wavelength polarimetric campaigns would improve our understanding of the total jet energies and magnetic field configurations in the emission regions of various types of GRBs, which are required to comprehend the mass scales of their progenitor systems and the physics of collisionless shocks.",
author = "Y. Urata and K. Toma and S. Covino and K. Wiersema and K. Huang and J. Shimoda and A. Kuwata and S. Nagao and K. Asada and H. Nagai and S. Takahashi and C.-E. Chung and G. Petitpas and K. Yamaoka and L. Izzo and J. Fynbo and {de Ugarte Postigo}, A. and M. Arabsalmani and M. Tashiro",
year = "2022",
month = dec,
day = "8",
doi = "10.1038/s41550-022-01832-7",
language = "English",
volume = "7",
pages = "80--87",
journal = "Nature Astronomy",
issn = "2397-3366",
publisher = "Nature Publishing Group",

}

RIS

TY - JOUR

T1 - Simultaneous radio and optical polarimetry of GRB 191221B afterglow

AU - Urata, Y.

AU - Toma, K.

AU - Covino, S.

AU - Wiersema, K.

AU - Huang, K.

AU - Shimoda, J.

AU - Kuwata, A.

AU - Nagao, S.

AU - Asada, K.

AU - Nagai, H.

AU - Takahashi, S.

AU - Chung, C.-E.

AU - Petitpas, G.

AU - Yamaoka, K.

AU - Izzo, L.

AU - Fynbo, J.

AU - de Ugarte Postigo, A.

AU - Arabsalmani, M.

AU - Tashiro, M.

PY - 2022/12/8

Y1 - 2022/12/8

N2 - Gamma-ray bursts (GRBs) are the most luminous transients in the universe and are utilized as probes of early stars, gravitational wave counterparts and collisionless shock physics. In spite of studies on polarimetry of GRBs in individual wavelengths that characterized intriguing properties of prompt emission and afterglow, no coordinated multi-wavelength measurements have yet been performed. Here we report the first coordinated simultaneous polarimetry in the optical and radio bands for the afterglow associated with the typical long GRB 191221B. Our observations successfully caught the radio emission, which is not affected by synchrotron self-absorption, and show that the emission is depolarized in the radio band compared with the optical one. Our simultaneous polarization angle measurement and temporal polarization monitoring indicate the existence of cool electrons that increase the estimate of jet kinetic energy by a factor of more than 4 for this GRB afterglow. Further coordinated multi-wavelength polarimetric campaigns would improve our understanding of the total jet energies and magnetic field configurations in the emission regions of various types of GRBs, which are required to comprehend the mass scales of their progenitor systems and the physics of collisionless shocks.

AB - Gamma-ray bursts (GRBs) are the most luminous transients in the universe and are utilized as probes of early stars, gravitational wave counterparts and collisionless shock physics. In spite of studies on polarimetry of GRBs in individual wavelengths that characterized intriguing properties of prompt emission and afterglow, no coordinated multi-wavelength measurements have yet been performed. Here we report the first coordinated simultaneous polarimetry in the optical and radio bands for the afterglow associated with the typical long GRB 191221B. Our observations successfully caught the radio emission, which is not affected by synchrotron self-absorption, and show that the emission is depolarized in the radio band compared with the optical one. Our simultaneous polarization angle measurement and temporal polarization monitoring indicate the existence of cool electrons that increase the estimate of jet kinetic energy by a factor of more than 4 for this GRB afterglow. Further coordinated multi-wavelength polarimetric campaigns would improve our understanding of the total jet energies and magnetic field configurations in the emission regions of various types of GRBs, which are required to comprehend the mass scales of their progenitor systems and the physics of collisionless shocks.

U2 - 10.1038/s41550-022-01832-7

DO - 10.1038/s41550-022-01832-7

M3 - Journal article

VL - 7

SP - 80

EP - 87

JO - Nature Astronomy

JF - Nature Astronomy

SN - 2397-3366

ER -