Detection of diffuse TeV gamma-ray emission from the neaby starburst galaxy NGC 253

C. Itoh; R. Enomoto; S. Yanagita; T. Yoshida; A. Asahara; G. V. Bicknell; R. W. Clay; P. G. Edwards; S. Gunji; S. Hara; T. Hara; T. Hattori; Shin Hayashi; Sei Hayashi; S. Kabuki; F. Kajino; H. Katagiri; A. Kawachi; T. Kifune; H. Kubo; J. Kushida; Y. Matsubara; Y. Mizumoto; M. Mori; H. Moro; H. Muraishi; Y. Muraki; T. Naito; T. Nakase; D. Nishida; K. Nishijima; K. Okumura; M. Ohishi; J. R. Patterson; R. J. Protheroe; K. Sakurazawa; D. L. Swaby; T. Tanimori; F. Tokanai; K. Tsuchiya; H. Tsunoo; T. Uchida; A. Watanabe; S. Watanabe; T. Yoshikoshi

doi:10.1051/0004-6361:20021565

Detection of diffuse TeV gamma-ray emission from the neaby starburst galaxy NGC 253

C. Itoh, R. Enomoto^*, S. Yanagita, T. Yoshida, A. Asahara, G. V. Bicknell, R. W. Clay, P. G. Edwards, S. Gunji, S. Hara, T. Hara, T. Hattori, Shin Hayashi, Sei Hayashi, S. Kabuki, F. Kajino, H. Katagiri, A. Kawachi, T. Kifune, H. KuboJ. Kushida, Y. Matsubara, Y. Mizumoto, M. Mori, H. Moro, H. Muraishi, Y. Muraki, T. Naito, T. Nakase, D. Nishida, K. Nishijima, K. Okumura, M. Ohishi, J. R. Patterson, R. J. Protheroe, K. Sakurazawa, D. L. Swaby, T. Tanimori, F. Tokanai, K. Tsuchiya, H. Tsunoo, T. Uchida, A. Watanabe, S. Watanabe, T. Yoshikoshi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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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 10 m 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.

Original language	English
Pages (from-to)	L1-L4
Journal	Astronomy and Astrophysics
Volume	396
Issue number	1
DOIs	https://doi.org/10.1051/0004-6361:20021565
Publication status	Published - Dec 2002

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Itoh, C., Enomoto, R., Yanagita, S., Yoshida, T., Asahara, A., Bicknell, G. V., Clay, R. W., Edwards, P. G., Gunji, S., Hara, S., Hara, T., Hattori, T., Hayashi, S., Hayashi, S., Kabuki, S., Kajino, F., Katagiri, H., Kawachi, A., Kifune, T., ... Yoshikoshi, T. (2002). Detection of diffuse TeV gamma-ray emission from the neaby starburst galaxy NGC 253. Astronomy and Astrophysics, 396(1), L1-L4. https://doi.org/10.1051/0004-6361:20021565

@article{419b595820e84395966c2cc5e5976c39,

title = "Detection of diffuse TeV gamma-ray emission from the neaby starburst galaxy NGC 253",

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 10 m 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 = "Cosmic rays, Galaxies: individual: NGC 253, Galaxies: starburst, Gamma rays: observation",

author = "C. Itoh and R. Enomoto and S. Yanagita and T. Yoshida and A. Asahara and Bicknell, {G. V.} and Clay, {R. W.} and Edwards, {P. G.} and S. Gunji and S. Hara and T. Hara and T. Hattori and Shin Hayashi and Sei Hayashi and S. Kabuki and F. Kajino and H. Katagiri and A. Kawachi and T. Kifune and H. Kubo and J. Kushida and Y. Matsubara and Y. Mizumoto and M. Mori and H. Moro and H. Muraishi and Y. Muraki and T. Naito and T. Nakase and D. Nishida and K. Nishijima and K. Okumura and M. Ohishi and Patterson, {J. R.} and Protheroe, {R. J.} and K. Sakurazawa and Swaby, {D. L.} and T. Tanimori and F. Tokanai and K. Tsuchiya and H. Tsunoo and T. Uchida and A. Watanabe and S. Watanabe and T. Yoshikoshi",

year = "2002",

month = dec,

doi = "10.1051/0004-6361:20021565",

language = "English",

volume = "396",

pages = "L1--L4",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

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Itoh, C, Enomoto, R, Yanagita, S, Yoshida, T, Asahara, A, Bicknell, GV, Clay, RW, Edwards, PG, Gunji, S, Hara, S, Hara, T, Hattori, T, Hayashi, S, Hayashi, S, Kabuki, S, Kajino, F, Katagiri, H, Kawachi, A, Kifune, T, Kubo, H, Kushida, J, Matsubara, Y, Mizumoto, Y, Mori, M, Moro, H, Muraishi, H, Muraki, Y, Naito, T, Nakase, T, Nishida, D, Nishijima, K, Okumura, K, Ohishi, M, Patterson, JR, Protheroe, RJ, Sakurazawa, K, Swaby, DL, Tanimori, T, Tokanai, F, Tsuchiya, K, Tsunoo, H, Uchida, T, Watanabe, A, Watanabe, S & Yoshikoshi, T 2002, 'Detection of diffuse TeV gamma-ray emission from the neaby starburst galaxy NGC 253', Astronomy and Astrophysics, vol. 396, no. 1, pp. L1-L4. https://doi.org/10.1051/0004-6361:20021565

TY - JOUR

T1 - Detection of diffuse TeV gamma-ray emission from the neaby starburst galaxy NGC 253

AU - Itoh, C.

AU - Enomoto, R.

AU - Yanagita, S.

AU - Yoshida, T.

AU - Asahara, A.

AU - Bicknell, G. V.

AU - Clay, R. W.

AU - Edwards, P. G.

AU - Gunji, S.

AU - Hara, S.

AU - Hara, T.

AU - Hattori, T.

AU - Hayashi, Shin

AU - Hayashi, Sei

AU - Kabuki, S.

AU - Kajino, F.

AU - Katagiri, H.

AU - Kawachi, A.

AU - Kifune, T.

AU - Kubo, H.

AU - Kushida, J.

AU - Matsubara, Y.

AU - Mizumoto, Y.

AU - Mori, M.

AU - Moro, H.

AU - Muraishi, H.

AU - Muraki, Y.

AU - Naito, T.

AU - Nakase, T.

AU - Nishida, D.

AU - Nishijima, K.

AU - Okumura, K.

AU - Ohishi, M.

AU - Patterson, J. R.

AU - Protheroe, R. J.

AU - Sakurazawa, K.

AU - Swaby, D. L.

AU - Tanimori, T.

AU - Tokanai, F.

AU - Tsuchiya, K.

AU - Tsunoo, H.

AU - Uchida, T.

AU - Watanabe, A.

AU - Watanabe, S.

AU - Yoshikoshi, T.

PY - 2002/12

Y1 - 2002/12

N2 - 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 ∼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.

AB - 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 ∼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.

KW - Cosmic rays

KW - Galaxies: individual: NGC 253

KW - Galaxies: starburst

KW - Gamma rays: observation

UR - http://www.scopus.com/inward/record.url?scp=0036898126&partnerID=8YFLogxK

U2 - 10.1051/0004-6361:20021565

DO - 10.1051/0004-6361:20021565

M3 - Article

SN - 0004-6361

VL - 396

SP - L1-L4

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 1

ER -

Detection of diffuse TeV gamma-ray emission from the neaby starburst galaxy NGC 253

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