This article has an erratum: [erratum]
Volume 396, Number 1, December II 2002
|Page(s)||L1 - L4|
|Published online||22 November 2002|
Letter to the Editor
Detection of diffuse TeV gamma-ray emission from the neaby starburst galaxy NGC 253
Faculty of Science, Ibaraki University, Mito, Ibaraki 310-8512, Japan
2 Institute for Cosmic Ray Research, Univ. of Tokyo, Kashiwa, Chiba 277-8582, Japan
3 Department of Physics, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
4 MSSSO, Australian National University, ACT 2611, Australia
5 Department of Physics and Math. Physics, University of Adelaide, SA 5005, Australia
6 Institute for Space and Aeronautical Science, Sagamihara, Kanagawa 229-8510, Japan
7 Department of Physics, Yamagata University, Yamagata, Yamagata 990-8560, Japan
8 Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan
9 Faculty of Management Information, Yamanashi Gakuin University, Kofu,Yamanashi 400-8575, Japan
10 Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
11 Department of Physics, Konan University, Hyogo 658-8501, Japan
12 Faculty of Engineering, Shinshu University, Nagano, Nagano 380-8553, Japan
13 STE Laboratory, Nagoya University, Nagoya, Aichi 464-8601, Japan
14 National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan
15 Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences, Ibaraki 300-0394, Japan
16 Department of Physics, Osaka City University, Osaka, Osaka 558-8585, Japan
Corresponding author: R. Enomoto, firstname.lastname@example.org
Accepted: 29 October 2002
We report the TeV gamma-ray observations of the nearby normal spiral galaxy NGC 253. At a distance of ~2.5 Mpc, NGC 253 is one of the nearest starburst galaxies. This relative closeness, coupled with the high star formation rate in the galaxy, make it a good candidate TeV gamma-ray source. Observations were carried out in 2000 and 2001 with the CANGAROO-II 10 m imaging atmospheric Cerenkov telescope. TeV gamma-ray emission is detected at the ~ level with a flux of at energies >0.5 TeV. The data indicate that the emission region is broader than the point spread function of our telescope.
Key words: gamma rays: observation / galaxies: individual: NGC 253 / galaxies: starburst / cosmic rays
© ESO, 2002
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