Polarization Measurement aboard the Satellite and Solution of the Emission Mechanism of the Gamma-Ray Bursts

点击翻译按钮获取中文摘要

The Gamma-Ray Burst Polarimeter (GAP) was installed aboard the IKAROS solar-sail spacecraft which was launched on May 21st 2010. We realized the first gamma-ray polarimetry in the world. We detected the strong polarization in the prompt emissions of three gamma-ray bursts, and we consider that the emission mechanism is probably synchrotron radiation. Moreover, we detected possible evidence of the existence of inner structures in the relativistic jets. We could contribute to reveal the emission mechanism of gamma-ray bursts.