GRB 011121: Jet, wind and supernova -- all in one

Bibcode
2004ASPC..312..263G
Greiner, J.; Klose, S.; Salvato, M.; Zeh, A.; Schwarz, R.; Hartmann, D. H.; Masetti, N.; Stecklum, B.; Lamer, G.; Lodieu, N.; Scholz, R. D.; Sterken, C.; Gorosabel, J.; Burud, I.; Rhoads, J.; Mitrofanov, I.; Litvak, M.; Sanin, A.; Grinkov, V.; Andersen, M. I.; Castro Cerón, J. M.; Castro-Tirado, A. J.; Fruchter, A.; Fynbo, J. U.; Hjorth, J.; Kaper, L.; Kouveliotou, C.; Palazzi, E.; Pian, E.; Rol, E.; Salamanca, I.; Tanvir, N. R.; Vreeswijk, P. M.; Wijers, R. A. M. J.; van den Heuvel, E.
Referencia bibliográfica

Third Rome Workshop on Gamma-Ray Bursts in the Afterglow Era ASP Conference Series, Volume 312, Proceedings of the conference held 17-20 September 2002, in Rome, Italy. Edited by M. Feroci, F. Frontera, N. Masetti, and L. Piro. San Francisco: Astronomical Society of the Pacific, 2004., p.263

Fecha de publicación:
6
2004
Número de autores
35
Número de autores del IAC
0
Número de citas
1
Número de citas referidas
1
Descripción
We report optical and near-infrared follow-up observations of GRB 011121. We discover a break in the afterglow light curve after 1.3 days, which implies an initial jet opening angle of ˜9°. The jet origin of this break is supported by the achromatic spectral energy distribution. During later phases, GRB 011121 shows significant excess emission above the flux predicted by a power law decline, interpreted as light from an underlying supernova. The deduced parameters for the decay slope as well as the spectral index favor a wind scenario, i.e. an outflow into a circum-burst environment shaped by the stellar wind of a massive GRB progenitor. Due to its low redshift of z=0.36, GRB 011121 is the so far best example for the GRB-supernova connection, and provides compelling evidence for a circum-burster wind region expected to exist if the progenitor was a massive star.
Tipo
Sin árbitro

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