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2005PASJ...57L..11Y - Publ. Astron. Soc. Jap., 57, L11-L15 (2005/June-0)
Giant flare of Sgr 1806-20 from a relativistic jet.
YAMAZAKI R., IOKA K., TAKAHARA F. and SHIBAZAKI N.
Abstract (from CDS):
begin{HTML} The Japanese magnetospheric explorer GEOTAIL recorded a detailed light curve during the initial 600msec of a giant flare from SGR 1806-20 on 2004 December 27. We show that the observed light curve is well explained by emission from relativistically expanding fireballs, like those of gamma-ray bursts (GRBs). Especially, the observed rapid fading after 500msec suggests that ejecta were collimated in a jet. We derived an upper limit on the jet opening half-angle of 0.2rad, which is as narrow as those of GRBs.
Abstract Copyright: ∼
Journal keyword(s): gamma rays: theory - ISM: jets and outflows - stars: neutron - stars: pulsars: individual: SGR 1806-20
Nomenclature: NAME SGR 0526-66 added.
Simbad objects: 4
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