GRB 011121: A collimated outflow into wind-blown surroundings

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dc.creatorGreiner, J.
dc.creatorKlose, S.
dc.creatorSalvato, M.
dc.creatorZeh, A.
dc.creatorSchwarz, R.
dc.creatorHartmann, D. H.
dc.creatorMasetti, N.
dc.creatorStecklum, B.
dc.creatorLamer, G.
dc.creatorLodieu, N.
dc.creatorScholz, R. D.
dc.creatorSterken, C.
dc.creatorGorosabel, J.
dc.creatorBurud, I.
dc.creatorRhoads, J.
dc.creatorMitrofanov, I.
dc.creatorLitvak, M.
dc.creatorSanin, A.
dc.creatorGrinkov, V.
dc.creatorAndersen, M. I.
dc.creatorCerón, J. M. Castro
dc.creatorCastro-Tirado, A. J.
dc.creatorFruchter, A.
dc.creatorFynbo, J. U.
dc.creatorHjorth, J.
dc.creatorKaper, L.
dc.creatorKouveliotou, C.
dc.creatorPalazzi, E.
dc.creatorPian, E.
dc.creatorRol, E.
dc.creatorTanvir, N. R.
dc.creatorVreeswijk, P. M.
dc.creatorWijers, R. A. M. J.
dc.creatorHeuvel, E. van den
dc.date2003-09-26
dc.date.accessioned2026-07-07T12:00:57Z
dc.date.available2026-07-07T12:00:57Z
dc.descriptionWe discover a break in the GRB 011121 afterglow light curve after 1.3 days, which implies an initial jet opening angle of about 9 deg. The SED during the first four days is achromatic, and supports the jet origin of this break. The SED during the supernova bump can be best represented by a black body with a temperature of 6000 K. 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 has been the best example for the GRB-supernova connection until GRB 030329, and provides compelling evidence for a circum-burster wind region expected to exist if the progenitor was a massive star.
dc.description22 pages ApJ style, accepted for publication
dc.identifierhttps://arxiv.org/abs/astro-ph/0309733
dc.identifierhttp://arxiv.org/abs/astro-ph/0309733
dc.identifierAstrophys.J.599:1223-1237,2003
dc.identifierdoi:10.1086/379606
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206952
dc.subjectAstrophysics
dc.titleGRB 011121: A collimated outflow into wind-blown surroundings
dc.typetext

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