Evidence for a magnetospheric untwisting in the post-Giant Flare X-ray emission of SGR 1806-20

Nanda Rea

SRON - National Institute for Space Research


The Chandra satellite observed the magnetar candidate SGR 1806-20 almost one month after its Giant Flare in December 2004. This was the first X-ray observation after the flare with a high spectral resolution instrument. The X-ray emission of the source strongly suggest that a magnetospheric untwisting took (or is still taking) place, soon after the twist which could have triggered the Giant Flare.

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