K
Koji Nakazawa
Researcher at Nagoya University
Publications - 111
Citations - 1698
Koji Nakazawa is an academic researcher from Nagoya University. The author has contributed to research in topics: Gamma-ray burst & Detector. The author has an hindex of 22, co-authored 109 publications receiving 1540 citations. Previous affiliations of Koji Nakazawa include Kyoto University & University of Tokyo.
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The e-ASTROGAM mission: Exploring the extreme Universe with gamma rays in the MeV – GeV range
A. De Angelis,Vincent Tatischeff,M. Tavani,Uwe Oberlack,I. Grenier,Lorraine Hanlon,R. Walter,A. Argan,P. von Ballmoos,Andrea Bulgarelli,I. Donnarumma,M. Hernanz,Irfan Kuvvetli,M. Pearce,Andrzej A. Zdziarski,Alessio Aboudan,Marco Ajello,G. Ambrosi,Denis Bernard,Elisa Bernardini,V. Bonvicini,A. Brogna,M. Branchesi,Carl Budtz-Jørgensen,A. M. Bykov,Roberto Campana,M. Cardillo,Paolo De Coppi,D. de Martino,Roland Diehl,Michele Doro,Valentina Fioretti,Stefan Funk,Gabriele Ghisellini,Eric Grove,C. Hamadache,Dieter H. Hartmann,M. Hayashida,J. Isern,Gottfried Kanbach,J. Kiener,Jürgen Knödlseder,Claudio Labanti,P. Laurent,O. Limousin,Francesco Longo,Karl Mannheim,Martino Marisaldi,M. Martinez,Mn Mazziotta,Julie McEnery,Sandro Mereghetti,G. Minervini,A. A. Moiseev,A. Morselli,Koji Nakazawa,Piotr Orleanski,J. M. Paredes,B. Patricelli,J. Peyré,G. Piano,M. Pohl,Harald Ramarijaona,Riccardo Rando,I. Reichardt,M. Roncadelli,Rui M. Curado da Silva,Fabrizio Tavecchio,D. J. Thompson,Roberto Turolla,Roberto Turolla,A. Ulyanov,Andrea Vacchi,Xiaoya Wu,Andreas Zoglauer +74 more
TL;DR: The e-ASTROGAM (enhanced ASTROGAM) project as mentioned in this paper is a breakthrough Observatory space mission, with a detector composed by a Silicon tracker, a calorimeter, and an anticoincidence system, dedicated to the study of the non-thermal Universe in the photon energy range from 0.3 MeV to 3 GeV.
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Limits to nu micro, nu e--> nu tau oscillations and nu micro, nu e--> tau - direct coupling.
N. Ushida,T. Kondo,Shigeki Tasaka,I. G. Park,J. S. Song,T. Hara,Yasuhiro Homma,Y. Tsuzuki,G. Fujioka,H. Fukushima,Y. Takahashi,S. Tatsumi,C. Yokoyama,K. Fujiwara,K. Taruma,S. Y. Bahk,C. O. Kim,Jaebeom Park,D. C. Bailey,S. Conetti,P. Mercure,J. Trischuk,M. Turcotte,Shigeki Aoki,K. Chiba,H. Fuchi,K. Hoshino,K. Kodama,R. Matsui,Motoaki Miyanishi,M. Nakamura,Koji Nakazawa,K. Niu,Kimio Niwa,M. Ohashi,H. Sasaki,Yasuhiro Tomita,N. Torii,O. Yamakawa,Y. Yanagisawa,Aubrecht Gj nd,J. M. Dunlea,S. Errede,A. Gauthier,M. Gutzwiller,S. Kuramata,G. A. Oleynik,N. W. Reay,K. Reibel,R. A. Sidwell,N. R. Stanton,K. Moriyama,H. Shibata,O. Kusumoto,Y. Noguchi,T. Okusawa,M. Teranaka,J. Yamato,H. Okabe,J. Yokota,S. G. Frederiksen,C. J. D. Hébert,J. Hebert,B. McLeod +63 more
TL;DR: The direct-coupling limits are used to show that most tau/sup -/ decays must contain a neutral lepton other than ..nu../sub ..mu../ or ..nu..sub e/.
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Statistical properties of metal abundances of the intracluster medium in the central region of clusters
Yasushi Fukazawa,Kazuo Makishima,Takayuki Tamura,Koji Nakazawa,Hajime Ezawa,Yasushi Ikebe,Kenichi Kikuchi,Takaya Ohashi +7 more
TL;DR: In this paper, the authors measured metal abundances of the intracluster medium in the central regions of 34 nearby clusters of galaxies, using ASCA data, and found that the central excess metals are ejected from cD galaxies.
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Possible evidence for free precession of a strongly magnetized neutron star in the magnetar 4U 0142+61.
Kazuo Makishima,Teruaki Enoto,J. Hiraga,Toshio Nakano,Koji Nakazawa,Soki Sakurai,Masaki Sasano,Hiroshi Murakami +7 more
TL;DR: The magnetar 4 U 0142+61, one of the prototypes of this class, was studied in broadband x rays with the Suzaku observatory and suggests a strong toroidal magnetic field, ∼ 10(12) T, residing inside the object.
Journal ArticleDOI
Long‐duration γ ray emissions from 2007 and 2008 winter thunderstorms
Harufumi Tsuchiya,Teruaki Enoto,Shinya Yamada,Takayuki Yuasa,Koji Nakazawa,Takao Kitaguchi,Madoka Kawaharada,Motohide Kokubun,H. Kato,M. Okano,Kazuo Makishima +10 more
TL;DR: The Gamma-Ray Observation of Winter Thunderclouds (GROWTH) experiment, consisting of two radiation detection subsystems, has been operating since 2006 on the premises of Kashiwazaki-Kariwa nuclear power plant located at the coastal area of Japan Sea as discussed by the authors.