CANGAROO-III observation of TeV gamma rays from the unidentified gamma-ray source HESS J1614-518

T. Mizukami; H. Kubo; T. Yoshida; T. Nakamori; R. Enomoto; T. Tanimori; M. Akimoto; G. V. Bicknell; R. W. Clay; P. G. Edwards; S. Gunji; S. Hara; T. Hara; S. Hayashi; H. Ishioka; S. Kabuki; F. Kajino; H. Katagiri; A. Kawachi; T. Kifune; R. Kiuchi; T. Kunisawa; J. Kushida; T. Matoba; Y. Matsubara; I. Matsuzawa; Y. Mizumura; Y. Mizumoto; M. Mori; H. Muraishi; T. Naito; K. Nakayama; K. Nishijima; M. Ohishi; Y. Otake; S. Ryoki; K. Saito; Y. Sakamoto; V. Stamatescu; T. Suzuki; D. L. Swaby; G. Thornton; F. Tokanai; Y. Toyota; K. Tsuchiya; S. Yanagita; Y. Yokoe; T. Yoshikoshi; Y. Yukawa

doi:10.1088/0004-637X/740/2/78

CANGAROO-III observation of TeV gamma rays from the unidentified gamma-ray source HESS J1614-518

T. Mizukami^*, H. Kubo, T. Yoshida, T. Nakamori, R. Enomoto, T. Tanimori, M. Akimoto, G. V. Bicknell, R. W. Clay, P. G. Edwards, S. Gunji, S. Hara, T. Hara, S. Hayashi, H. Ishioka, S. Kabuki, F. Kajino, H. Katagiri, A. Kawachi, T. KifuneR. Kiuchi, T. Kunisawa, J. Kushida, T. Matoba, Y. Matsubara, I. Matsuzawa, Y. Mizumura, Y. Mizumoto, M. Mori, H. Muraishi, T. Naito, K. Nakayama, K. Nishijima, M. Ohishi, Y. Otake, S. Ryoki, K. Saito, Y. Sakamoto, V. Stamatescu, T. Suzuki, D. L. Swaby, G. Thornton, F. Tokanai, Y. Toyota, K. Tsuchiya, S. Yanagita, Y. Yokoe, T. Yoshikoshi, Y. Yukawa

^*Corresponding author for this work

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

3 Citations (Scopus)

Abstract

We report the detection, with the CANGAROO-III imaging atmospheric Cherenkov telescope array, of a very high energy gamma-ray signal from the unidentified gamma-ray source HESS J1614-518, which was discovered in the H.E.S.S. Galactic plane survey. Diffuse gamma-ray emission was detected above 760GeV at the 8.9σ level during an effective exposure of 54hr from 2008 May to August. The spectrum can be represented by a power law: (8.2 ± 2.2_stat ±2.5_sys) × 10^-12 × (E/1 TeV)^-γcm^-2s^-1 TeV^-1 with a photon index γ of 2.4 ± 0.3_stat ±0.2 _sys, which is compatible with that of the H.E.S.S. observations. By combining our result with multiwavelength data, we discuss the possible counterparts for HESS J1614-518 and consider radiation mechanisms based on hadronic and leptonic processes for a supernova remnant (SNR), stellar winds from massive stars, and a pulsar wind nebula (PWN). Although a leptonic origin from a PWN driven by an unknown pulsar remains possible, hadronic-origin emission from an unknown SNR is preferred.

Original language	English
Article number	78
Journal	Astrophysical Journal
Volume	740
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/740/2/78
Publication status	Published - 20 Oct 2011

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Mizukami, T., Kubo, H., Yoshida, T., Nakamori, T., Enomoto, R., Tanimori, T., Akimoto, M., Bicknell, G. V., Clay, R. W., Edwards, P. G., Gunji, S., Hara, S., Hara, T., Hayashi, S., Ishioka, H., Kabuki, S., Kajino, F., Katagiri, H., Kawachi, A., ... Yukawa, Y. (2011). CANGAROO-III observation of TeV gamma rays from the unidentified gamma-ray source HESS J1614-518. Astrophysical Journal, 740(2), Article 78. https://doi.org/10.1088/0004-637X/740/2/78

@article{ba0b39eca5d14edca4c99b4021b4b32c,

title = "CANGAROO-III observation of TeV gamma rays from the unidentified gamma-ray source HESS J1614-518",

abstract = "We report the detection, with the CANGAROO-III imaging atmospheric Cherenkov telescope array, of a very high energy gamma-ray signal from the unidentified gamma-ray source HESS J1614-518, which was discovered in the H.E.S.S. Galactic plane survey. Diffuse gamma-ray emission was detected above 760GeV at the 8.9σ level during an effective exposure of 54hr from 2008 May to August. The spectrum can be represented by a power law: (8.2 ± 2.2stat ±2.5sys) × 10-12 × (E/1 TeV)-γcm-2s-1 TeV-1 with a photon index γ of 2.4 ± 0.3stat ±0.2 sys, which is compatible with that of the H.E.S.S. observations. By combining our result with multiwavelength data, we discuss the possible counterparts for HESS J1614-518 and consider radiation mechanisms based on hadronic and leptonic processes for a supernova remnant (SNR), stellar winds from massive stars, and a pulsar wind nebula (PWN). Although a leptonic origin from a PWN driven by an unknown pulsar remains possible, hadronic-origin emission from an unknown SNR is preferred.",

keywords = "ISM: individual objects (HESS J1614518), gamma rays: ISM",

author = "T. Mizukami and H. Kubo and T. Yoshida and T. Nakamori and R. Enomoto and T. Tanimori and M. Akimoto and Bicknell, {G. V.} and Clay, {R. W.} and Edwards, {P. G.} and S. Gunji and S. Hara and T. Hara and S. Hayashi and H. Ishioka and S. Kabuki and F. Kajino and H. Katagiri and A. Kawachi and T. Kifune and R. Kiuchi and T. Kunisawa and J. Kushida and T. Matoba and Y. Matsubara and I. Matsuzawa and Y. Mizumura and Y. Mizumoto and M. Mori and H. Muraishi and T. Naito and K. Nakayama and K. Nishijima and M. Ohishi and Y. Otake and S. Ryoki and K. Saito and Y. Sakamoto and V. Stamatescu and T. Suzuki and Swaby, {D. L.} and G. Thornton and F. Tokanai and Y. Toyota and K. Tsuchiya and S. Yanagita and Y. Yokoe and T. Yoshikoshi and Y. Yukawa",

year = "2011",

month = oct,

day = "20",

doi = "10.1088/0004-637X/740/2/78",

language = "English",

volume = "740",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2",

}

Mizukami, T, Kubo, H, Yoshida, T, Nakamori, T, Enomoto, R, Tanimori, T, Akimoto, M, Bicknell, GV, Clay, RW, Edwards, PG, Gunji, S, Hara, S, Hara, T, Hayashi, S, Ishioka, H, Kabuki, S, Kajino, F, Katagiri, H, Kawachi, A, Kifune, T, Kiuchi, R, Kunisawa, T, Kushida, J, Matoba, T, Matsubara, Y, Matsuzawa, I, Mizumura, Y, Mizumoto, Y, Mori, M, Muraishi, H, Naito, T, Nakayama, K, Nishijima, K, Ohishi, M, Otake, Y, Ryoki, S, Saito, K, Sakamoto, Y, Stamatescu, V, Suzuki, T, Swaby, DL, Thornton, G, Tokanai, F, Toyota, Y, Tsuchiya, K, Yanagita, S, Yokoe, Y, Yoshikoshi, T & Yukawa, Y 2011, 'CANGAROO-III observation of TeV gamma rays from the unidentified gamma-ray source HESS J1614-518', Astrophysical Journal, vol. 740, no. 2, 78. https://doi.org/10.1088/0004-637X/740/2/78

TY - JOUR

T1 - CANGAROO-III observation of TeV gamma rays from the unidentified gamma-ray source HESS J1614-518

AU - Mizukami, T.

AU - Kubo, H.

AU - Yoshida, T.

AU - Nakamori, T.

AU - Enomoto, R.

AU - Tanimori, T.

AU - Akimoto, M.

AU - Bicknell, G. V.

AU - Clay, R. W.

AU - Edwards, P. G.

AU - Gunji, S.

AU - Hara, S.

AU - Hara, T.

AU - Hayashi, S.

AU - Ishioka, H.

AU - Kabuki, S.

AU - Kajino, F.

AU - Katagiri, H.

AU - Kawachi, A.

AU - Kifune, T.

AU - Kiuchi, R.

AU - Kunisawa, T.

AU - Kushida, J.

AU - Matoba, T.

AU - Matsubara, Y.

AU - Matsuzawa, I.

AU - Mizumura, Y.

AU - Mizumoto, Y.

AU - Mori, M.

AU - Muraishi, H.

AU - Naito, T.

AU - Nakayama, K.

AU - Nishijima, K.

AU - Ohishi, M.

AU - Otake, Y.

AU - Ryoki, S.

AU - Saito, K.

AU - Sakamoto, Y.

AU - Stamatescu, V.

AU - Suzuki, T.

AU - Swaby, D. L.

AU - Thornton, G.

AU - Tokanai, F.

AU - Toyota, Y.

AU - Tsuchiya, K.

AU - Yanagita, S.

AU - Yokoe, Y.

AU - Yoshikoshi, T.

AU - Yukawa, Y.

PY - 2011/10/20

Y1 - 2011/10/20

N2 - We report the detection, with the CANGAROO-III imaging atmospheric Cherenkov telescope array, of a very high energy gamma-ray signal from the unidentified gamma-ray source HESS J1614-518, which was discovered in the H.E.S.S. Galactic plane survey. Diffuse gamma-ray emission was detected above 760GeV at the 8.9σ level during an effective exposure of 54hr from 2008 May to August. The spectrum can be represented by a power law: (8.2 ± 2.2stat ±2.5sys) × 10-12 × (E/1 TeV)-γcm-2s-1 TeV-1 with a photon index γ of 2.4 ± 0.3stat ±0.2 sys, which is compatible with that of the H.E.S.S. observations. By combining our result with multiwavelength data, we discuss the possible counterparts for HESS J1614-518 and consider radiation mechanisms based on hadronic and leptonic processes for a supernova remnant (SNR), stellar winds from massive stars, and a pulsar wind nebula (PWN). Although a leptonic origin from a PWN driven by an unknown pulsar remains possible, hadronic-origin emission from an unknown SNR is preferred.

AB - We report the detection, with the CANGAROO-III imaging atmospheric Cherenkov telescope array, of a very high energy gamma-ray signal from the unidentified gamma-ray source HESS J1614-518, which was discovered in the H.E.S.S. Galactic plane survey. Diffuse gamma-ray emission was detected above 760GeV at the 8.9σ level during an effective exposure of 54hr from 2008 May to August. The spectrum can be represented by a power law: (8.2 ± 2.2stat ±2.5sys) × 10-12 × (E/1 TeV)-γcm-2s-1 TeV-1 with a photon index γ of 2.4 ± 0.3stat ±0.2 sys, which is compatible with that of the H.E.S.S. observations. By combining our result with multiwavelength data, we discuss the possible counterparts for HESS J1614-518 and consider radiation mechanisms based on hadronic and leptonic processes for a supernova remnant (SNR), stellar winds from massive stars, and a pulsar wind nebula (PWN). Although a leptonic origin from a PWN driven by an unknown pulsar remains possible, hadronic-origin emission from an unknown SNR is preferred.

KW - ISM: individual objects (HESS J1614518)

KW - gamma rays: ISM

UR - http://www.scopus.com/inward/record.url?scp=80053975504&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/740/2/78

DO - 10.1088/0004-637X/740/2/78

M3 - Article

SN - 0004-637X

VL - 740

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 78

ER -

CANGAROO-III observation of TeV gamma rays from the unidentified gamma-ray source HESS J1614-518

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