Evidence of TeV gamma-ray emission from the nearby starburst galaxy NGC 253

C Itoh,T Nakase,T Hara,D L Swaby,A Asahara,F Kajino,D Nishida,K Nishijima,K Sakurazawa,R J Protheroe,H Muraishi,M Mori,K Tsuchiya,A Kawachi,J Kushida,S Watanabe,Y Muraki,G V Bicknell,Akira Watanabe ,Fuyuki Tokanai ,Hajime Tsunoo ,Joseph Patterson ,Ko Okumura ,Philip Edwards ,S Hayashi ,Shinji Hara ,Shuichi Gunji ,Takahiro Hattori ,Tatsuo Yoshida ,Tomohisa Uchida ,S Kabuki,Y Matsubara,T Tanimori,R W Clay,S Yanagita,R Enomoto,H Katagiri,T Kifune,T Naito,H Kubo,T Yoshikoshi,H Moro,M Ohishi,Y Mizumoto

doi:10.1051/0004-6361:20030247

Evidence of TeV gamma-ray emission from the nearby starburst galaxy NGC 253

C Itoh, T Nakase + Show 42 more

Open Access

https://doi.org/10.1051/0004-6361:20030247

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Journal: Astronomy & Astrophysics	Publication Date: Apr 14, 2003
Citations: 25

Affiliation: Ibaraki University, Tokai University, Yamanashi Gakuin University, University of Adelaide, Kyoto University, Konan University, Tokyo Institute of Technology, Ibaraki Prefectural University of Health Sciences, The University of Tokyo, Australian National University, Shinshu University

#Kpc In Radius #TeV Gamma-ray + Show 8 more

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Abstract

TeV gamma-rays were recently detected from the nearby normal spiral galaxy NGC 253 (Itoh et al. 2002). Observations to detect the Cherenkov light images initiated by gamma-rays from the direction of NGC 253 were carried out in 2000 and 2001 over a total period of150 hours. The orientation of images in gamma-ray-like events is not consistent with emission from a point source, and the emission region corresponds to a size greater than 10 kpc in radius. Here, detailed descriptions of the analysis procedures and techniques are given.

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