Schady, P; De Pasquale, M; Page, MJ; Zane, S; Breeveld, A; Mason, KO; ... Norris, JP; + view all Schady, P; De Pasquale, M; Page, MJ; Zane, S; Breeveld, A; Mason, KO; Oates, SR; Poole, TS; Smith, PJ; Vetere, L; Wang, XY; Burrows, DN; Gronwall, C; Hunsberger, S; Mészáros, P; Pagani, C; Roming, PWA; Vanden Berk, DE; Cummings, J; Gehrels, N; Markwardt, C; Zhang, B; Norris, JP; - view fewer (2008) Extreme Properties of GRB 061007: A highly energetic or a highly collimated burst? In: AIP Conference Proceedings. (pp. 200 - 203).
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GRB 061007 had the brightest optical afterglow observed by UVOT so far and a highly unusual afterglow light curve. It had an usually smooth and steep panchromatic temporal decay, which, from the start of the Swift observations, decayed as a power with a slope of α=1.65±0.02 in the X-ray and UV/optical bands. If we interpret the data in terms of a spherical blastwave, the energy budget that is implied is enormous, challenging the possible models for the progenitors. The alternative explanation is that with GRB 061007 we are witnessing the most collimated outflow ever observed. If this is correct, if implies the occurrence of a jet break within 80 s of the prompt emission. This event has therefore remarkable consequences for the GRB communicate, since it may imply that jet breaks can occur much earlier in the afterglow light curves than hitherto expected. © 2008 American Institute of Physics.
|Title:||Extreme Properties of GRB 061007: A highly energetic or a highly collimated burst?|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Space and Climate Physics|
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