Rotation of Polarization Angle in Gamma-Ray Burst Prompt Phase

Abstract The rotations of the polarization angle (PA) with time (energy) can lead to depolarization time-integrated (energy-integrated) polarization. However, we do not know how and when it will rotate. Here, consider a magnetic reconnection model investigate polarizations, especially PA gamma-ray burst (GRB) prompt emission. For large-scale ordered aligned field configuration, find that within T 50 PAs rotate for slight off-axis observations. Our studies show are due changes in observed image emitting region before being averaged over equal arrival surface unresolved sources. We apply our single-pulse bursts GRB 170101A 170114A time-resolved interpret violent variation 170101A, while could predict two 90° 170114A. A more detailed should be considered.