Detailed optical and near-infrared polarimetry, spectroscopy and broad-band photometry of the afterglow of GRB 091018: polarization evolution
- Wiersema, K.
- Curran, P. A.
- Krühler, T.
- Melandri, A.
- Rol, E.
- Starling, R. L. C.
- Tanvir, N. R.
- van Der Horst, A. J.
- Covino, S.
- Fynbo, J. P. U.
- Goldoni, P.
- Gorosabel, J.
- Hjorth, J.
- Klose, S.
- Mundell, C. G.
- O'Brien, P. T.
- Palazzi, E.
- Wijers, R. A. M. J.
- d'Elia, V.
- Evans, P. A.
- Filgas, R.
- Gomboc, A.
- Greiner, J.
- Guidorzi, C.
- Kaper, L.
- Kobayashi, S.
- Kouveliotou, C.
- Levan, A. J.
- Rossi, A.
- Rowlinson, A.
- Steele, I. A.
- de Ugarte Postigo, A.
- Vergani, S. D.
DOIAbstract
International audienceFollow-up observations of large numbers of gamma-ray burst (GRB) afterglows, facilitated by the Swift satellite, have produced a large sample of spectral energy distributions and light curves, from which their basic micro- and macro-physical parameters can in principle be derived. However, a number of phenomena have been observed that defy explanation by simple versions of the standard fireball model, leading to a variety of new models. Polarimetry can be a major independent diagnostic of afterglow physics, probing the magnetic field properties and internal structure of the GRB jets. In this paper we present the first high-quality multi-night polarimetric light curve of a Swift GRB afterglow, aimed at providing a well-...
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