|Budget Amount *help
¥64,870,000 (Direct Cost: ¥49,900,000、Indirect Cost: ¥14,970,000)
Fiscal Year 2012: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2011: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2010: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
Fiscal Year 2009: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
Fiscal Year 2008: ¥37,830,000 (Direct Cost: ¥29,100,000、Indirect Cost: ¥8,730,000)
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.