The Polarization Evolution of the Optical Afterglow of GRB 030329

Greiner, J., Klose, S., Reinsch, K., Schmid, H. M., Sari, R., Hartmann, D.H., Kouveliotou, C., Rau, A., Palazzi, E., Straubmeier, C., Stecklum, B., Zharikov, S., Tovmassian, G., Bdrnbantner, O., Ries, C., Jehin, E., Henden, A., Kaas, A. A., Grav, T., Hjorth, J., Pedersen, H., Wijers, R. A. M. J., Kaufer, A., Park, H.-S., Williams, G., and Reimer, O.
GAMMA-RAY BURSTS: 30 YEARS OF DISCOVERY: Gamma-Ray Burst Symposium. AIP Conference Proceedings, Volume 727, pp. 269-273 (2004).


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.