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ID 17236
file
creator
Yamazaki, Ryo
Ioka, Kunihito
Takahara, Fumio
Shibazaki, Noriaki
subject
gamma rays
theory - stars
neutron - stars
pulsars
individual (SGR 1806-20) -ISM
jets and outflows
NDC
Astronomy. Space sciences
abstract
Japanese magnetospheric explorer GEOTAIL recorded a detailed light curve during the initial 600 msec of a giant flare from SGR 1806-20 on December 27, 2004. We show that the observed light curve is well explained by an emission from relativistically expanding fireballs, like those of gamma-ray bursts (GRBs). Especially, the observed rapid fading after 500 msec suggests that ejecta is collimated in a jet. We derive an upper limit on the jet opening half-angle of 0.2 radian that is as narrow as those of GRBs.
journal title
Journal of Physics : Conference Series
volume
Volume 31
issue
Issue 1
start page
99
end page
102
date of issued
2006-05-22
publisher
IOP
issn
1742-6588
publisher doi
language
eng
nii type
Conference Paper
HU type
Conference Papers
DCMI type
text
format
application/pdf
text version
author
relation is version of URL
http://dx.doi.org/10.1088/1742-6596/31/1/016
department
Graduate School of Science