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|Title:||A very luminous magnetar-powered supernova associated with an ultra-long γ-ray burst||Authors:||Greiner, Jochen
Mazzali, Paolo A.
Kann, D. Alexander
Olivares E., Felipe
Afonso, Paulo M. J.
Fynbo, Johan P. U.
Graham, John F.
Guelbenzu, Ana Nicuesa
Updike, Adria C.
van Eerten, Hendrik
|Issue Date:||2015||Journal:||NATURE||Number:||523||Issue:||7559||First Page:||189||Abstract:||A new class of ultra-long-duration (more than 10,000 seconds) γ-ray bursts has recently been suggested. They may originate in the explosion of stars with much larger radii than those producing normal long-duration γ-ray bursts or in the tidal disruption of a star. No clear supernova has yet been associated with an ultra-long-duration γ-ray burst. Here we report that a supernova (SN 2011kl) was associated with the ultra-long-duration γ-ray burst GRB 111209A, at a redshift z of 0.677. This supernova is more than three times more luminous than type Ic supernovae associated with long-duration γ-ray bursts, and its spectrum is distinctly different. The slope of the continuum resembles those of super-luminous supernovae, but extends further down into the rest-frame ultraviolet implying a low metal content. The light curve evolves much more rapidly than those of super-luminous supernovae. This 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 supernovae.||Acknowledgments:||We thank R. Lunnan and E. Berger for providing the spectrum of PS1-10bzj in digital form, and A. Levan for the HST grism spectra of GRB 111209A. J.G., R.D. and D.A.K. acknowledge support by the DFG cluster of excellence “Origin and Structure of the Universe” ( http://www.universe-cluster.de ). P.S., J.F.G. and M.T. acknowledge support through the Sofja Kovalevskaja award to P.S. from the Alexander von Humboldt Foundation, Germany. C.D. acknowledges support through EXTraS, funded from the European Union’s Seventh Framework Programme for research, technological development and demonstration. S.K., D.A.K. and A.N.G. acknowledge support by DFG. S. Schmidl acknowledges support by the Thüringer Ministerium für Bildung, Wissenschaft und Kultur. F.O.E. acknowledges support from FONDECYT. S.T. is supported by DFG. R.F. acknowledges support by Czech MEYS. Part of the funding for GROND (both hardware as well as personnel) was generously granted from the Leibniz-Prize to G. Hasinger. DARK is funded by the DNRF.||URI:||http://hdl.handle.net/20.500.12386/23302||URL:||https://www.nature.com/articles/nature14579
|Appears in Collections:||1.01 Articoli in rivista|
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