Observation of an extended very high energy gamma-ray emission from MSH 15-52 with CANGAROO-III

T. Nakamori; H. Kubo; T. Yoshida; T. Tanimori; R. Enomoto; G. V. Bicknell; R. W. Clay; P. G. Edwards; S. Gunji; S. Hara; T. Hara; T. Hattori; S. Hayashi; Y. Higashi; Y. Hirai; K. Inoue; S. Kabuki; F. Kajino; H. Katagiri; A. Kawachi; T. Kifune; R. Kiuchi; J. Kushida; Y. Matsubara; T. Mizukami; Y. Mizumoto; R. Mizumwa; M. Mori; H. Muraishi; Y. Muraki; T. Naito; S. Nakano; D. Nishida; K. Nishijima; M. Ohishi; Y. Sakamoto; A. Seki; V. Stamatescu; T. Suzuki; D. L. Swaby; G. Thornton; F. Tokanai; K. Tsuchiya; S. Watanabe; Y. Yamada; E. Yamazaki; S. Yanagita; T. Yoshikoshi; Y. Yukawa

doi:10.1086/529029

Observation of an extended very high energy gamma-ray emission from MSH 15-52 with CANGAROO-III

T. Nakamori^*, H. Kubo, T. Yoshida, T. Tanimori, R. Enomoto, G. V. Bicknell, R. W. Clay, P. G. Edwards, S. Gunji, S. Hara, T. Hara, T. Hattori, S. Hayashi, Y. Higashi, Y. Hirai, K. Inoue, S. Kabuki, F. Kajino, H. Katagiri, A. KawachiT. Kifune, R. Kiuchi, J. Kushida, Y. Matsubara, T. Mizukami, Y. Mizumoto, R. Mizumwa, M. Mori, H. Muraishi, Y. Muraki, T. Naito, S. Nakano, D. Nishida, K. Nishijima, M. Ohishi, Y. Sakamoto, A. Seki, V. Stamatescu, T. Suzuki, D. L. Swaby, G. Thornton, F. Tokanai, K. Tsuchiya, S. Watanabe, Y. Yamada, E. Yamazaki, S. Yanagita, T. Yoshikoshi, Y. Yukawa

^*Corresponding author for this work

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Abstract

We have observed the supernova remnant MSH 15-52 (G320.4-1.2), which contains the gamma-ray pulsar PSR B1509-58, using the CANGAROO-III imaging atmospheric Cerenkov telescope array from 2006 April to June. We detected gamma rays above 810 GeV at the 7 σ level during a total effective exposure of 48.4 hr. We obtained a differential gamma-ray flux at 2.35 TeV of (7.9 ± 1.5_stat ± 1.7_sys) × 10^-13 cm ^-2 s^-1 TeV^-1, with a photon index of 2.21 ± 0.39_stat ± 0.40_sys, which is compatible with that of the H.E.S.S. observation in 2004. The morphology shows extended emission compared to our point spread function. We consider the plausible origin of the high-energy emission based on a multiwavelength spectral analysis and energetics arguments.

Original language	English
Pages (from-to)	297-305
Number of pages	9
Journal	Astrophysical Journal
Volume	677
Issue number	1
DOIs	https://doi.org/10.1086/529029
Publication status	Published - 10 Apr 2008

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Nakamori, T., Kubo, H., Yoshida, T., Tanimori, T., Enomoto, R., Bicknell, G. V., Clay, R. W., Edwards, P. G., Gunji, S., Hara, S., Hara, T., Hattori, T., Hayashi, S., Higashi, Y., Hirai, Y., Inoue, K., Kabuki, S., Kajino, F., Katagiri, H., ... Yukawa, Y. (2008). Observation of an extended very high energy gamma-ray emission from MSH 15-52 with CANGAROO-III. Astrophysical Journal, 677(1), 297-305. https://doi.org/10.1086/529029

@article{6db1ad0b99564a63914cdd1dc7349beb,

title = "Observation of an extended very high energy gamma-ray emission from MSH 15-52 with CANGAROO-III",

abstract = "We have observed the supernova remnant MSH 15-52 (G320.4-1.2), which contains the gamma-ray pulsar PSR B1509-58, using the CANGAROO-III imaging atmospheric Cerenkov telescope array from 2006 April to June. We detected gamma rays above 810 GeV at the 7 σ level during a total effective exposure of 48.4 hr. We obtained a differential gamma-ray flux at 2.35 TeV of (7.9 ± 1.5stat ± 1.7sys) × 10-13 cm -2 s-1 TeV-1, with a photon index of 2.21 ± 0.39stat ± 0.40sys, which is compatible with that of the H.E.S.S. observation in 2004. The morphology shows extended emission compared to our point spread function. We consider the plausible origin of the high-energy emission based on a multiwavelength spectral analysis and energetics arguments.",

keywords = "Gamma rays: observations, ISM: individual (MSH 15-52, G320.4-1.2), Pulsars: individual (PSR B1509-58), Supernova remnants",

author = "T. Nakamori and H. Kubo and T. Yoshida and T. Tanimori and R. Enomoto 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 S. Hayashi and Y. Higashi and Y. Hirai and K. Inoue and S. Kabuki and F. Kajino and H. Katagiri and A. Kawachi and T. Kifune and R. Kiuchi and J. Kushida and Y. Matsubara and T. Mizukami and Y. Mizumoto and R. Mizumwa and M. Mori and H. Muraishi and Y. Muraki and T. Naito and S. Nakano and D. Nishida and K. Nishijima and M. Ohishi and Y. Sakamoto and A. Seki and V. Stamatescu and T. Suzuki and Swaby, {D. L.} and G. Thornton and F. Tokanai and K. Tsuchiya and S. Watanabe and Y. Yamada and E. Yamazaki and S. Yanagita and T. Yoshikoshi and Y. Yukawa",

year = "2008",

month = apr,

day = "10",

doi = "10.1086/529029",

language = "English",

volume = "677",

pages = "297--305",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1",

}

Nakamori, T, Kubo, H, Yoshida, T, Tanimori, T, Enomoto, R, Bicknell, GV, Clay, RW, Edwards, PG, Gunji, S, Hara, S, Hara, T, Hattori, T, Hayashi, S, Higashi, Y, Hirai, Y, Inoue, K, Kabuki, S, Kajino, F, Katagiri, H, Kawachi, A, Kifune, T, Kiuchi, R, Kushida, J, Matsubara, Y, Mizukami, T, Mizumoto, Y, Mizumwa, R, Mori, M, Muraishi, H, Muraki, Y, Naito, T, Nakano, S, Nishida, D, Nishijima, K, Ohishi, M, Sakamoto, Y, Seki, A, Stamatescu, V, Suzuki, T, Swaby, DL, Thornton, G, Tokanai, F, Tsuchiya, K, Watanabe, S, Yamada, Y, Yamazaki, E, Yanagita, S, Yoshikoshi, T & Yukawa, Y 2008, 'Observation of an extended very high energy gamma-ray emission from MSH 15-52 with CANGAROO-III', Astrophysical Journal, vol. 677, no. 1, pp. 297-305. https://doi.org/10.1086/529029

TY - JOUR

T1 - Observation of an extended very high energy gamma-ray emission from MSH 15-52 with CANGAROO-III

AU - Nakamori, T.

AU - Kubo, H.

AU - Yoshida, T.

AU - Tanimori, T.

AU - Enomoto, R.

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, S.

AU - Higashi, Y.

AU - Hirai, Y.

AU - Inoue, K.

AU - Kabuki, S.

AU - Kajino, F.

AU - Katagiri, H.

AU - Kawachi, A.

AU - Kifune, T.

AU - Kiuchi, R.

AU - Kushida, J.

AU - Matsubara, Y.

AU - Mizukami, T.

AU - Mizumoto, Y.

AU - Mizumwa, R.

AU - Mori, M.

AU - Muraishi, H.

AU - Muraki, Y.

AU - Naito, T.

AU - Nakano, S.

AU - Nishida, D.

AU - Nishijima, K.

AU - Ohishi, M.

AU - Sakamoto, Y.

AU - Seki, A.

AU - Stamatescu, V.

AU - Suzuki, T.

AU - Swaby, D. L.

AU - Thornton, G.

AU - Tokanai, F.

AU - Tsuchiya, K.

AU - Watanabe, S.

AU - Yamada, Y.

AU - Yamazaki, E.

AU - Yanagita, S.

AU - Yoshikoshi, T.

AU - Yukawa, Y.

PY - 2008/4/10

Y1 - 2008/4/10

N2 - We have observed the supernova remnant MSH 15-52 (G320.4-1.2), which contains the gamma-ray pulsar PSR B1509-58, using the CANGAROO-III imaging atmospheric Cerenkov telescope array from 2006 April to June. We detected gamma rays above 810 GeV at the 7 σ level during a total effective exposure of 48.4 hr. We obtained a differential gamma-ray flux at 2.35 TeV of (7.9 ± 1.5stat ± 1.7sys) × 10-13 cm -2 s-1 TeV-1, with a photon index of 2.21 ± 0.39stat ± 0.40sys, which is compatible with that of the H.E.S.S. observation in 2004. The morphology shows extended emission compared to our point spread function. We consider the plausible origin of the high-energy emission based on a multiwavelength spectral analysis and energetics arguments.

AB - We have observed the supernova remnant MSH 15-52 (G320.4-1.2), which contains the gamma-ray pulsar PSR B1509-58, using the CANGAROO-III imaging atmospheric Cerenkov telescope array from 2006 April to June. We detected gamma rays above 810 GeV at the 7 σ level during a total effective exposure of 48.4 hr. We obtained a differential gamma-ray flux at 2.35 TeV of (7.9 ± 1.5stat ± 1.7sys) × 10-13 cm -2 s-1 TeV-1, with a photon index of 2.21 ± 0.39stat ± 0.40sys, which is compatible with that of the H.E.S.S. observation in 2004. The morphology shows extended emission compared to our point spread function. We consider the plausible origin of the high-energy emission based on a multiwavelength spectral analysis and energetics arguments.

KW - Gamma rays: observations

KW - ISM: individual (MSH 15-52, G320.4-1.2)

KW - Pulsars: individual (PSR B1509-58)

KW - Supernova remnants

UR - http://www.scopus.com/inward/record.url?scp=42549163368&partnerID=8YFLogxK

U2 - 10.1086/529029

DO - 10.1086/529029

M3 - Article

SN - 0004-637X

VL - 677

SP - 297

EP - 305

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

Observation of an extended very high energy gamma-ray emission from MSH 15-52 with CANGAROO-III

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