GRAINE project: precise gamma-ray observations with balloon-borne emulsion telescope

被引：0
|
作者：
Rokujo, Hiroki [1 ]
机构：
[1] Nagoya Univ, Nagoya, Aichi, Japan
[2] Kobe Univ, Kobe, Hyogo, Japan
来源：
XX INTERNATIONAL SYMPOSIUM ON VERY HIGH ENERGY COSMIC RAY INTERACTIONS (ISVHECRI 2018) | 2019年 / 208卷
关键词：
MULTISTAGE SHIFTER;
D O I：
10.1051/epjconf/201920814003
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Observation of cosmic gamma rays is important in the understanding of high-energy objects or phenomena in the universe. Since 2008, the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope (Fermi-LAT) has surveyed the sub-GeV/GeV gamma-ray sky and achieved high statistics measurements. However, observation at low galactic latitudes remains difficult owing to the lack of angular resolution, and new issues following the operation of Fermi-LAT have arisen. We devised a precise gamma-ray observation project, Gamma-Ray Astro-Imager with Nuclear Emulsion (GRAINE), using balloon-borne emulsion gamma-ray telescopes to realize high angular resolution, polarization-sensitive, and large-aperture observations in the 10 MeV-100 GeV energy region. Following basic developments on the ground, we performed three balloon-borne experiments with upgraded instruments. In this paper, we present results from the second balloon experiment in 2015, a report on the latest balloon experiment conducted on April 26, 2018, and a recent study on hadronic interactions using proton beams.
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页数：6
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