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    Structure in the radio counterpart to the 2004 December 27 giant flare from SGR 1806-20

    Access Status
    Fulltext not available
    Authors
    Fender, R.
    Muxlow, T.
    Garrett, M.
    Kouveliotou, C.
    Gaensler, B.
    Garrington, S.
    Paragi, Z.
    Tudose, V.
    Miller-Jones, James
    Spencer, R.
    Wijers, R.
    Taylor, G.
    Date
    2006
    Type
    Journal Article
    
    Metadata
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    Citation
    Fender, R. and Muxlow, T. and Garrett, M. and Kouveliotou, C. and Gaensler, B. and Garrington, S. and Paragi, Z. et al. 2006. Structure in the radio counterpart to the 2004 December 27 giant flare from SGR 1806-20. Monthly Notices of the Royal Astronomical Society: Letters. 367 (1): pp. L6-L10.
    Source Title
    Monthly Notices of the Royal Astronomical Society: Letters
    Additional URLs
    http://onlinelibrary.wiley.com/doi/10.1111/j.1745-3933.2006.00123.x/full
    ISSN
    1745-3925
    URI
    http://hdl.handle.net/20.500.11937/5404
    Collection
    • Curtin Research Publications
    Abstract

    On 2004 December 27, the magnetar SGR 1806-20 underwent an enormous outburst resulting in the formation of an expanding, moving, and fading radio source. We report observations of this radio source with the Multi-Element Radio-Linked Interferometer Network and the Very Long Baseline Array. The observations confirm the elongation and expansion already reported based on observations at lower angular resolutions, but suggest that at early epochs the structure is not consistent with the very simplest models such as a smooth flux distribution. In particular, there appears to be significant structure on small angular scales, with ~10 per cent of the radio flux arising on angular scales <=100 milliarcsec. This structure may correspond to localized sites of particle acceleration during the early phases of expansion and interaction with the ambient medium.

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