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A very luminous magnetar-powered supernova associated with an ultra-long gamma-ray burst

Greiner, J, Mazzali, PA, Kann, DA, Kruehler, T, Pian, E, Prentice, SJ, Felipe Olivares, E, Rossi, A, Klose, S, Taubenberger, S, Knust, F, Afonso, PMJ, Ashall, C, Bolmer, J, Delvaux, C, Diehl, R, Elliott, J, Filgas, R, Fynbo, JPU, Graham, JF , Guelbenzu, AN, Kobayashi, S, Leloudas, G, Savaglio, S, Schady, P, Schmidl, S, Schweyer, T, Sudilovsky, V, Tanga, M, Updike, AC, van Eerten, H and Varela, K (2015) A very luminous magnetar-powered supernova associated with an ultra-long gamma-ray burst. Nature, 523 (7559). pp. 189-192. ISSN 0028-0836

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A new class of ultra-long duration (>10,000 s) gamma-ray bursts has recently been suggested1,2,3. They may originate in the explosion of stars with much larger radii than normal long gamma-ray bursts3,4 or in the tidal disruptions of a star3. No clear supernova had yet been associated with an ultra-long gamma-ray burst. Here we report that a supernova (2011kl) was associated with the ultra-long duration burst 111209A, at z=0.677. This supernova is more than 3 times more luminous than type Ic supernovae associated with long gamma-ray bursts5,6,7, and its spectrum is distinctly different. The continuum slope resembles those of super-luminous supernovae8,9, but extends farther down into the rest-frame ultra-violet implying a low metal content. The light curve evolves much more rapidly than super-luminous supernovae. The combination of high luminosity and low metal-line opacity cannot be reconciled with typical type Ic supernovae, but can be reproduced by a model where extra energy is injected by a strongly magnetized neutron star (a magnetar), which has also been proposed as the explanation for super-luminous supernovae20,20a.

Item Type: Article
Uncontrolled Keywords: MD Multidisciplinary
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: Nature Publishing Group
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Date Deposited: 07 Dec 2015 08:25
Last Modified: 04 Sep 2021 13:45
DOI or ID number: doi.org/10.1038/nature14579
URI: https://researchonline.ljmu.ac.uk/id/eprint/2436
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