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Short GRB 160821B :
Short GRB 160821B : A Reverse Shock, a Refreshed Shock, and a Well-sampled Kilonova
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Lamb, G. P. (author)
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Tanvir, N. R. (author)
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Levan, A. J. (author)
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show more...
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de Ugarte Postigo, A. (author)
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Kawaguchi, K. (author)
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Corsi, A. (author)
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Evans, P. A. (author)
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Gompertz, B. (author)
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Malesani, D. B. (author)
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Page, K. L. (author)
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Wiersema, K. (author)
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- Rosswog, Stephan (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Shibata, M. (author)
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Tanaka, M. (author)
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van der Horst, A. J. (author)
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Cano, Z. (author)
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Fynbo, J. P. U. (author)
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Fruchter, A. S. (author)
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Greiner, J. (author)
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Heintz, K. (author)
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Higgins, A. (author)
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Hjorth, J. (author)
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Izzo, L. (author)
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Jakobsson, P. (author)
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Kann, D. A. (author)
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O'Brien, P. T. (author)
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Perley, D. A. (author)
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Pian, E. (author)
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Pugliese, G. (author)
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Starling, R. L. C. (author)
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Thöne, C. C. (author)
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Watson, D. (author)
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Wijers, R. A. M. J. (author)
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Xu, D. (author)
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(creator_code:org_t)
- 2019-09-19
- 2019
- English.
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In: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 883:1
- Related links:
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https://ui.adsabs.ha...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Subject headings
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- We report our identification of the optical afterglow and host galaxy of the short-duration gamma-ray burst sGRB 160821B. The spectroscopic redshift of the host is z = 0.162, making it one of the lowest redshift short-duration gamma-ray bursts (sGRBs) identified by Swift. Our intensive follow-up campaign using a range of ground-based facilities as well as Hubble Space Telescope, XMM-Newton, and Swift, shows evidence for a late-time excess of optical and near-infrared emission in addition to a complex afterglow. The afterglow light curve at X-ray frequencies reveals a narrow jet, theta(j) similar to 1.9(-0.03)(+0.10) deg, that is refreshed at >1 day post-burst by a slower outflow with significantly more energy than the initial outflow that produced the main GRB. Observations of the 5 GHz radio afterglow shows a reverse shock into a mildly magnetized shell. The optical and near-infrared excess is fainter than AT2017gfo associated with GW170817, and is well explained by a kilonova with dynamic ejecta mass M-dyn = (1.0 +/- 0.6) x 10(-3) M-circle dot and a secular (post-merger) ejecta mass with M-pm = (1.0 +/- 0.6) x 10(-2) M-circle dot, consistent with a binary neutron star merger resulting in a short-lived massive neutron star. This optical and near-infrared data set provides the best-sampled kilonova light curve without a gravitational wave trigger to date.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- gamma-ray burst: individual (GRB 160821B)
- stars: neutron
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Lamb, G. P.
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Tanvir, N. R.
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Levan, A. J.
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de Ugarte Postig ...
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Kawaguchi, K.
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Corsi, A.
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show more...
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Evans, P. A.
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Gompertz, B.
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Malesani, D. B.
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Page, K. L.
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Wiersema, K.
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Rosswog, Stephan
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Shibata, M.
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Tanaka, M.
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van der Horst, A ...
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Cano, Z.
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Fynbo, J. P. U.
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Fruchter, A. S.
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Greiner, J.
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Heintz, K.
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Higgins, A.
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Hjorth, J.
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Izzo, L.
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Jakobsson, P.
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Kann, D. A.
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O'Brien, P. T.
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Perley, D. A.
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Pian, E.
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Pugliese, G.
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Starling, R. L. ...
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Thöne, C. C.
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Watson, D.
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Wijers, R. A. M. ...
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Xu, D.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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Astrophysical Jo ...
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Stockholm University