The polarization evolution of the optical afterglow of GRB 030329

J. Greiner , S. Klose , K. Reinsch , H.M. Schmid , R. Sari , D.H. Hartmann , C. Kouveliotou , A. Rau

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E. Palazzi C. Straubmeier B. Stecklum S. Zharikov G. Tovmassian O. Barnbantner C. Ries E. Jehin A. Henden A.A. Kaas T. Grav J. Hjorth H. Pedersen R.A.M.J. Wijers A. Kaufer H.-S. Park G. Williams O. Reimer

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keywords afterglowhighcoherencedataevolutionfieldfrequencygenerated

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We report 31 polarimetric observations of the afterglow of GRB 030329 with high signal-to-noise and high sampling frequency. The data imply that the afterglow magnetic field has small coherence length and is mostly random, probably generated by turbulence.

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The polarization evolution of the optical afterglow of GRB 030329

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