Understanding of Jet Structure of Gamma-ray Bursts with Broad-band and High-sensitive Gamma-ray Observation

2015 Fiscal Year Final Research Report

• Project/Area Number: 25800151
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Hiroshima University
• Principal Investigator: OHNO MASANORI 広島大学, 理学(系)研究科(研究院), 助教 (50509875)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: ガンマ線バースト / フェルミ衛星 / ASTRO-H

Outline of Final Research Achievements

We performed gamma-ray observations with Fermi gamma-ray telescope to gamma-ray bursts which is thought to have ultra-relativistic jet. High-energy gamma-rays observed by Fermi revealed that gamma-ray emission mechanism of gamma-ray bursts cannot be explained by standard scenario and we discussed motion of jet. In addition, we developed future instruments for observing gamma-ray bursts onboard Japanese next X-ray observatory ASTRO-H. We successfully fabricated flight model of sensors and performed on-ground calibrations as scheduled. Finally, we confirmed that instruments of ASTRO-H worked properly after launch.

Free Research Field

X線ガンマ線天文学