Takahiro Obara
Japan Aerospace Exploration Agency
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Publication
Featured researches published by Takahiro Obara.
Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017) | 2017
K. Kamiya; Kiyokazu Koga; Satoshi Masada; Haruhisa Matsumoto; Y. Muraki; Takahiro Obara; Osamu Okudaira; Yasuyuki T. Tanaka; S. Shibata; Tateo Goka
On June 3, 2012, a very impulsive solar flare was observed by the GOES, RHESSI and FERMI- LAT satellites. The intensity of the flare was M3.3. The hard X-ray intensity (> 100 keV) rose ≥ 1000 times within one minute and then decayed immediately to the background level (in less than one minute). It was an extremely impulsive flare. By chance, the SEDA-FIB solar neutron detector onboard the International Space Station detected a 5.1σ enhancement due to solar neutrons. Therefore, it provided a good opportunity to investigate the mechanism of instantaneous proton acceleration to a few GeV. Based on the results of a new Monte Carlo calculation, we will show a reasonable proton acceleration model for the June 3, 2012 event. We also reexamined another very impulsive flare observed on June 10, 2010.
arXiv: Instrumentation and Methods for Astrophysics | 2013
Y. Muraki; Tateo Goka; Haruhisa Matsumoto; S. Shibata; Kiyokazu Koga; Takahiro Obara; Osamu Okudaira; T. Yamamoto
Acta Astronautica | 2012
Takahiro Obara; Haruhisa Matsumoto; Kiyokazu Koga
Data Science Journal | 2010
Takahiro Obara; Kiyokazu Koga; Yugo Kimoto; Haruhisa Matsumoto; S. Sasaki; Noriko Yamada; S. Muraki; T. Doke; Tateo Goka
Archive | 2008
Takahiro Obara; Haruhisa Matsumoto; Kiyokazu Koga; Hideki Koshiishi; Tateo Goka; 小原 隆博; 松本 晴久; 古賀 清一; 越石 英樹; 五家 建夫
Transactions of The Japan Society for Aeronautical and Space Sciences, Space Technology Japan | 2009
Takahiro Obara; Haruhisa Matsumoto; Kiyokazu Koga; Hideki Koshiishi; Tateo Goka
Transactions of The Japan Society for Aeronautical and Space Sciences, Space Technology Japan | 2012
Satoshi Furuhata; Haruhisa Matsumoto; Takahiro Obara
Transactions of The Japan Society for Aeronautical and Space Sciences, Space Technology Japan | 2012
Haruhisa Matsumoto; Nana Higashio; Takahiro Obara
Archive | 2010
Nana Higashio; Takahiro Obara; Haruhisa Matsumoto; Kiyokazu Koga; Hideki Koshiishi
Archive | 2010
Kiyokazu Koga; Haruhisa Matsumoto; Yugo Kimoto; Takahiro Obara; Tateo Goka
