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Type: Journal article
Title: Detection of diffuse TeV gamma-ray emission from the nearby starbust galaxy NGC 253
Author: Itoh, C.
Enomoto, R.
Yanagita, S.
Yoshida, T.
Asahara, A.
Bicknell, G.
Clay, R.
Edwards, P.
Gunji, S.
Hara, S.
Hara, T.
Hattori, T.
Hayashi, S.
Hayashi, S.
Kabuki, S.
Kajino, F.
Katagiri, H.
Kawachi, A.
Kifune, T.
Kubo, H.
et al.
Citation: Astronomy and Astrophysics: a European journal, 2002; 396(1):L1-L4
Publisher: EDP Sciences
Issue Date: 2002
ISSN: 0004-6361
Statement of
C. Itoh ... R. W. Clay ... J. R. Patterson, R. J. Protheroe ... D. L. Swaby ... et al.
Abstract: 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 10m imaging atmospheric Cerenkov telescope. TeV gamma-ray emission is detected at the ∼11σ level with a flux of (7.8 ± 2.5) × 10⁻¹² cm⁻² s⁻¹ at energies >0.5 TeV. The data indicate that the emission region is broader than the point spread function of our telescope.
Keywords: gamma rays: observation; galaxies: individual: NGC 253; galaxies: starburst; cosmic rays
Provenance: An erratum for this article has been published. Please click on the description link below to view the erratum.
Rights: © ESO 2002. Article published by EDP Sciences
DOI: 10.1051/0004-6361:20021565
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