GRB3 - GRBs Observations vs. theory in the Swift era |
Speaker |
Götz, Diego |
Co-autors |
P. Laurent, F. Lebrun, F. Daigne, Z. Bosnjak |
Talk Title |
GRB prompt emission polarization measurements using INTEGRAL/IBIS |
Abstract |
We will present the polarization measurements of the prompt emission of GRB 041219A made with IBIS on board INTEGRAL. For this very long and bright Gamma-Ray Burst we detected a time variable higly polarized signal in the 200-800 keV energy range. Our results favor GRB models where the prompt emission at these energies is produced by synchrotron radiation from a relativistic outflow with a magnetic field, which is coherent on an angular size comparable with the angular size of the emitting region (~1/Γ). We will also present the upper limits we obtained for fainter GRBs detected with INTEGRAL. |
Talk view |
|
|