GEOTAIL observation of SGR 1900+14 giant flare on 27 August 1998

Details GEOTAIL observation of SGR 1900+14 giant flare on 27 August 1998 GEOTAIL observation of SGR 1900+14 giant flare on 27 August 1998

2006-12-29

arxiv.org/abs/astro-ph/0612788v1

Astronomy and Astrophysics

Astrophysics

Proceedings of the 363. WE-Heraeus Seminar on: Neutron Stars and Pulsars (Posters and contributed talks) Physikzentrum Bad Hon

Scientific paper

The soft gamma repeater (SGR) 1900+14 emitted the giant flare on 27 August 1998. Most gamma-ray detectors saturated during the initial spike of the giant flare because of the intense flux. However the plasma particle detector onboard GEOTAIL observed the first 300 ms time profile with a time resolution of 5.577 ms and the initial spike of the giant flare was first resolved. The time profile shows some similarities to that of the SGR 1806-20 giant flare in 2004: the clear exponential decay and the small hump in the decay phase around 300 or 400 ms.

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