Observation of the anisotropy of 10 TeV primary cosmic ray nuclei flux with the Super-Kamiokande-I detector

G. Guillian; J. Hosaka; K. Ishihara; J. Kameda; Y. Koshio; A. Minamino; C. Mitsuda; M. Miura; S. Moriyama; M. Nakahata; T. Namba; Y. Obayashi; H. Ogawa; M. Shiozawa; Y. Suzuki; A. Takeda; Y. Takeuchi; S. Yamada; I. Higuchi; M. Ishitsuka; T. Kajita; K. Kaneyuki; G. Mitsuka; S. Nakayama; H. Nishino; A. Okada; K. Okumura; C. Saji; Y. Takenaga; S. Desai; E. Kearns; J. L. Stone; L. R. Sulak; W. Wang; M. Goldhaber; D. Casper; W. Gajewski; J. Griskevich; W. R. Kropp; D. W. Liu; S. Mine; M. B. Smy; H. W. Sobel; M. R. Vagins; K. S. Ganezer; J. Hill; W. E. Keig; K. Scholberg; C. W. Walter; R. W. Ellsworth; S. Tasaka; A. Kibayashi; J. G. Learned; S. Matsuno; M. D. Messier; Y. Hayato; A. K. Ichikawa; T. Ishida; T. Ishii; T. Iwashita; T. Kobayashi; T. Nakadaira; K. Nakamura; K. Nitta; Y. Oyama; Y. Totsuka; A. T. Suzuki; M. Hasegawa; I. Kato; H. Maesaka; T. Nakaya; K. Nishikawa; H. Sato; S. Yamamoto; M. Yokoyama; T. J. Haines; S. Dazeley; S. Hatakeyama; R. Svoboda; E. Blaufuss; J. A. Goodman; G. W. Sullivan; D. Turcan; A. Habig; Y. Fukuda; Y. Itow; M. Sakuda; M. Yoshida; S. B. Kim; J. Yoo; H. Okazawa; T. Ishizuka; C. K. Jung; T. Kato; K. Kobayashi; M. Malek; C. Mauger; C. McGrew; E. Sharkey; C. Yanagisawa; Y. Gando; T. Hasegawa; K. Inoue; J. Shirai; A. Suzuki; K. Nishijima; H. Ishino; Y. Watanabe; M. Koshiba; D. Kielczewska; H. G. Berns; R. Gran; K. K. Shiraishi; A. L. Stachyra; K. Washburn; R. J. Wilkes; K. Munakata

doi:10.1103/PhysRevD.75.062003

Observation of the anisotropy of 10 TeV primary cosmic ray nuclei flux with the Super-Kamiokande-I detector

G. Guillian^*, J. Hosaka, K. Ishihara, J. Kameda, Y. Koshio, A. Minamino, C. Mitsuda, M. Miura, S. Moriyama, M. Nakahata, T. Namba, Y. Obayashi, H. Ogawa, M. Shiozawa, Y. Suzuki, A. Takeda, Y. Takeuchi, S. Yamada, I. Higuchi, M. IshitsukaT. Kajita, K. Kaneyuki, G. Mitsuka, S. Nakayama, H. Nishino, A. Okada, K. Okumura, C. Saji, Y. Takenaga, S. Desai, E. Kearns, J. L. Stone, L. R. Sulak, W. Wang, M. Goldhaber, D. Casper, W. Gajewski, J. Griskevich, W. R. Kropp, D. W. Liu, S. Mine, M. B. Smy, H. W. Sobel, M. R. Vagins, K. S. Ganezer, J. Hill, W. E. Keig, K. Scholberg, C. W. Walter, R. W. Ellsworth, S. Tasaka, A. Kibayashi, J. G. Learned, S. Matsuno, M. D. Messier, Y. Hayato, A. K. Ichikawa, T. Ishida, T. Ishii, T. Iwashita, T. Kobayashi, T. Nakadaira, K. Nakamura, K. Nitta, Y. Oyama, Y. Totsuka, A. T. Suzuki, M. Hasegawa, I. Kato, H. Maesaka, T. Nakaya, K. Nishikawa, H. Sato, S. Yamamoto, M. Yokoyama, T. J. Haines, S. Dazeley, S. Hatakeyama, R. Svoboda, E. Blaufuss, J. A. Goodman, G. W. Sullivan, D. Turcan, A. Habig, Y. Fukuda, Y. Itow, M. Sakuda, M. Yoshida, S. B. Kim, J. Yoo, H. Okazawa, T. Ishizuka, C. K. Jung, T. Kato, K. Kobayashi, M. Malek, C. Mauger, C. McGrew, E. Sharkey, C. Yanagisawa, Y. Gando, T. Hasegawa, K. Inoue, J. Shirai, A. Suzuki, K. Nishijima, H. Ishino, Y. Watanabe, M. Koshiba, D. Kielczewska, H. G. Berns, R. Gran, K. K. Shiraishi, A. L. Stachyra, K. Washburn, R. J. Wilkes, K. Munakata

^*Corresponding author for this work

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

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Abstract

The relative sidereal variation in the arrival direction of primary cosmic ray nuclei of median energy 10 TeV was measured using downward, through-going muons detected with the Super-Kamiokande-I detector. The projection of the anisotropy map onto the right ascension axis has a first harmonic amplitude of (6.64±0.98stat±0.55syst)×10-4 and a phase at maximum at (33.2°±8.2°stat±5.1°syst) right ascension. A sky map in equatorial coordinates indicates an excess region in the constellation of Taurus and a deficit region toward Virgo. The excess region is centered at (αT,δT)=(75°±7°,-5°±9°) with a half-opening angle χT=(39±7)°; the excess flux is (0.104±0.020)% above the isotropic expectation. The corresponding parameters for the deficit region are (αV,δV)= (205°±7°,5°±10°), χV=(54±7)°, and (-0.094±0.014)%. The data do not allow us to rule out a pure dipole form for the anisotropy (allowed at 13% confidence level); they are better described by the excess and deficit cones described above. We explored the implications under the assumption that the true anisotropy is not distorted too much by the analysis filter so that it is well-described by the observed excess and deficit cones.

Original language	English
Article number	062003
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	75
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevD.75.062003
Publication status	Published - 2007 Mar 23
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.75.062003

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Guillian, G., Hosaka, J., Ishihara, K., Kameda, J., Koshio, Y., Minamino, A., Mitsuda, C., Miura, M., Moriyama, S., Nakahata, M., Namba, T., Obayashi, Y., Ogawa, H., Shiozawa, M., Suzuki, Y., Takeda, A., Takeuchi, Y., Yamada, S., Higuchi, I., ... Munakata, K. (2007). Observation of the anisotropy of 10 TeV primary cosmic ray nuclei flux with the Super-Kamiokande-I detector. Physical Review D - Particles, Fields, Gravitation and Cosmology, 75(6), Article 062003. https://doi.org/10.1103/PhysRevD.75.062003

Guillian, G, Hosaka, J, Ishihara, K, Kameda, J, Koshio, Y, Minamino, A, Mitsuda, C, Miura, M, Moriyama, S, Nakahata, M, Namba, T, Obayashi, Y, Ogawa, H, Shiozawa, M, Suzuki, Y, Takeda, A, Takeuchi, Y, Yamada, S, Higuchi, I, Ishitsuka, M, Kajita, T, Kaneyuki, K, Mitsuka, G, Nakayama, S, Nishino, H, Okada, A, Okumura, K, Saji, C, Takenaga, Y, Desai, S, Kearns, E, Stone, JL, Sulak, LR, Wang, W, Goldhaber, M, Casper, D, Gajewski, W, Griskevich, J, Kropp, WR, Liu, DW, Mine, S, Smy, MB, Sobel, HW, Vagins, MR, Ganezer, KS, Hill, J, Keig, WE, Scholberg, K, Walter, CW, Ellsworth, RW, Tasaka, S, Kibayashi, A, Learned, JG, Matsuno, S, Messier, MD, Hayato, Y, Ichikawa, AK, Ishida, T, Ishii, T, Iwashita, T, Kobayashi, T, Nakadaira, T, Nakamura, K, Nitta, K, Oyama, Y, Totsuka, Y, Suzuki, AT, Hasegawa, M, Kato, I, Maesaka, H, Nakaya, T, Nishikawa, K, Sato, H, Yamamoto, S, Yokoyama, M, Haines, TJ, Dazeley, S, Hatakeyama, S, Svoboda, R, Blaufuss, E, Goodman, JA, Sullivan, GW, Turcan, D, Habig, A, Fukuda, Y, Itow, Y, Sakuda, M, Yoshida, M, Kim, SB, Yoo, J, Okazawa, H, Ishizuka, T, Jung, CK, Kato, T, Kobayashi, K, Malek, M, Mauger, C, McGrew, C, Sharkey, E, Yanagisawa, C, Gando, Y, Hasegawa, T, Inoue, K, Shirai, J, Suzuki, A, Nishijima, K, Ishino, H, Watanabe, Y, Koshiba, M, Kielczewska, D, Berns, HG, Gran, R, Shiraishi, KK, Stachyra, AL, Washburn, K, Wilkes, RJ & Munakata, K 2007, 'Observation of the anisotropy of 10 TeV primary cosmic ray nuclei flux with the Super-Kamiokande-I detector', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 75, no. 6, 062003. https://doi.org/10.1103/PhysRevD.75.062003

@article{006b38d64b2446f4b4704a5c40b01f64,

title = "Observation of the anisotropy of 10 TeV primary cosmic ray nuclei flux with the Super-Kamiokande-I detector",

abstract = "The relative sidereal variation in the arrival direction of primary cosmic ray nuclei of median energy 10 TeV was measured using downward, through-going muons detected with the Super-Kamiokande-I detector. The projection of the anisotropy map onto the right ascension axis has a first harmonic amplitude of (6.64±0.98stat±0.55syst)×10-4 and a phase at maximum at (33.2°±8.2°stat±5.1°syst) right ascension. A sky map in equatorial coordinates indicates an excess region in the constellation of Taurus and a deficit region toward Virgo. The excess region is centered at (αT,δT)=(75°±7°,-5°±9°) with a half-opening angle χT=(39±7)°; the excess flux is (0.104±0.020)% above the isotropic expectation. The corresponding parameters for the deficit region are (αV,δV)= (205°±7°,5°±10°), χV=(54±7)°, and (-0.094±0.014)%. The data do not allow us to rule out a pure dipole form for the anisotropy (allowed at 13% confidence level); they are better described by the excess and deficit cones described above. We explored the implications under the assumption that the true anisotropy is not distorted too much by the analysis filter so that it is well-described by the observed excess and deficit cones.",

author = "G. Guillian and J. Hosaka and K. Ishihara and J. Kameda and Y. Koshio and A. Minamino and C. Mitsuda and M. Miura and S. Moriyama and M. Nakahata and T. Namba and Y. Obayashi and H. Ogawa and M. Shiozawa and Y. Suzuki and A. Takeda and Y. Takeuchi and S. Yamada and I. Higuchi and M. Ishitsuka and T. Kajita and K. Kaneyuki and G. Mitsuka and S. Nakayama and H. Nishino and A. Okada and K. Okumura and C. Saji and Y. Takenaga and S. Desai and E. Kearns and Stone, {J. L.} and Sulak, {L. R.} and W. Wang and M. Goldhaber and D. Casper and W. Gajewski and J. Griskevich and Kropp, {W. R.} and Liu, {D. W.} and S. Mine and Smy, {M. B.} and Sobel, {H. W.} and Vagins, {M. R.} and Ganezer, {K. S.} and J. Hill and Keig, {W. E.} and K. Scholberg and Walter, {C. W.} and Ellsworth, {R. W.} and S. Tasaka and A. Kibayashi and Learned, {J. G.} and S. Matsuno and Messier, {M. D.} and Y. Hayato and Ichikawa, {A. K.} and T. Ishida and T. Ishii and T. Iwashita and T. Kobayashi and T. Nakadaira and K. Nakamura and K. Nitta and Y. Oyama and Y. Totsuka and Suzuki, {A. T.} and M. Hasegawa and I. Kato and H. Maesaka and T. Nakaya and K. Nishikawa and H. Sato and S. Yamamoto and M. Yokoyama and Haines, {T. J.} and S. Dazeley and S. Hatakeyama and R. Svoboda and E. Blaufuss and Goodman, {J. A.} and Sullivan, {G. W.} and D. Turcan and A. Habig and Y. Fukuda and Y. Itow and M. Sakuda and M. Yoshida and Kim, {S. B.} and J. Yoo and H. Okazawa and T. Ishizuka and Jung, {C. K.} and T. Kato and K. Kobayashi and M. Malek and C. Mauger and C. McGrew and E. Sharkey and C. Yanagisawa and Y. Gando and T. Hasegawa and K. Inoue and J. Shirai and A. Suzuki and K. Nishijima and H. Ishino and Y. Watanabe and M. Koshiba and D. Kielczewska and Berns, {H. G.} and R. Gran and Shiraishi, {K. K.} and Stachyra, {A. L.} and K. Washburn and Wilkes, {R. J.} and K. Munakata",

year = "2007",

month = mar,

day = "23",

doi = "10.1103/PhysRevD.75.062003",

language = "English",

volume = "75",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

publisher = "American Physical Society",

number = "6",

}

TY - JOUR

T1 - Observation of the anisotropy of 10 TeV primary cosmic ray nuclei flux with the Super-Kamiokande-I detector

AU - Guillian, G.

AU - Hosaka, J.

AU - Ishihara, K.

AU - Kameda, J.

AU - Koshio, Y.

AU - Minamino, A.

AU - Mitsuda, C.

AU - Miura, M.

AU - Moriyama, S.

AU - Nakahata, M.

AU - Namba, T.

AU - Obayashi, Y.

AU - Ogawa, H.

AU - Shiozawa, M.

AU - Suzuki, Y.

AU - Takeda, A.

AU - Takeuchi, Y.

AU - Yamada, S.

AU - Higuchi, I.

AU - Ishitsuka, M.

AU - Kajita, T.

AU - Kaneyuki, K.

AU - Mitsuka, G.

AU - Nakayama, S.

AU - Nishino, H.

AU - Okada, A.

AU - Okumura, K.

AU - Saji, C.

AU - Takenaga, Y.

AU - Desai, S.

AU - Kearns, E.

AU - Stone, J. L.

AU - Sulak, L. R.

AU - Wang, W.

AU - Goldhaber, M.

AU - Casper, D.

AU - Gajewski, W.

AU - Griskevich, J.

AU - Kropp, W. R.

AU - Liu, D. W.

AU - Mine, S.

AU - Smy, M. B.

AU - Sobel, H. W.

AU - Vagins, M. R.

AU - Ganezer, K. S.

AU - Hill, J.

AU - Keig, W. E.

AU - Scholberg, K.

AU - Walter, C. W.

AU - Ellsworth, R. W.

AU - Tasaka, S.

AU - Kibayashi, A.

AU - Learned, J. G.

AU - Matsuno, S.

AU - Messier, M. D.

AU - Hayato, Y.

AU - Ichikawa, A. K.

AU - Ishida, T.

AU - Ishii, T.

AU - Iwashita, T.

AU - Kobayashi, T.

AU - Nakadaira, T.

AU - Nakamura, K.

AU - Nitta, K.

AU - Oyama, Y.

AU - Totsuka, Y.

AU - Suzuki, A. T.

AU - Hasegawa, M.

AU - Kato, I.

AU - Maesaka, H.

AU - Nakaya, T.

AU - Nishikawa, K.

AU - Sato, H.

AU - Yamamoto, S.

AU - Yokoyama, M.

AU - Haines, T. J.

AU - Dazeley, S.

AU - Hatakeyama, S.

AU - Svoboda, R.

AU - Blaufuss, E.

AU - Goodman, J. A.

AU - Sullivan, G. W.

AU - Turcan, D.

AU - Habig, A.

AU - Fukuda, Y.

AU - Itow, Y.

AU - Sakuda, M.

AU - Yoshida, M.

AU - Kim, S. B.

AU - Yoo, J.

AU - Okazawa, H.

AU - Ishizuka, T.

AU - Jung, C. K.

AU - Kato, T.

AU - Kobayashi, K.

AU - Malek, M.

AU - Mauger, C.

AU - McGrew, C.

AU - Sharkey, E.

AU - Yanagisawa, C.

AU - Gando, Y.

AU - Hasegawa, T.

AU - Inoue, K.

AU - Shirai, J.

AU - Suzuki, A.

AU - Nishijima, K.

AU - Ishino, H.

AU - Watanabe, Y.

AU - Koshiba, M.

AU - Kielczewska, D.

AU - Berns, H. G.

AU - Gran, R.

AU - Shiraishi, K. K.

AU - Stachyra, A. L.

AU - Washburn, K.

AU - Wilkes, R. J.

AU - Munakata, K.

PY - 2007/3/23

Y1 - 2007/3/23

N2 - The relative sidereal variation in the arrival direction of primary cosmic ray nuclei of median energy 10 TeV was measured using downward, through-going muons detected with the Super-Kamiokande-I detector. The projection of the anisotropy map onto the right ascension axis has a first harmonic amplitude of (6.64±0.98stat±0.55syst)×10-4 and a phase at maximum at (33.2°±8.2°stat±5.1°syst) right ascension. A sky map in equatorial coordinates indicates an excess region in the constellation of Taurus and a deficit region toward Virgo. The excess region is centered at (αT,δT)=(75°±7°,-5°±9°) with a half-opening angle χT=(39±7)°; the excess flux is (0.104±0.020)% above the isotropic expectation. The corresponding parameters for the deficit region are (αV,δV)= (205°±7°,5°±10°), χV=(54±7)°, and (-0.094±0.014)%. The data do not allow us to rule out a pure dipole form for the anisotropy (allowed at 13% confidence level); they are better described by the excess and deficit cones described above. We explored the implications under the assumption that the true anisotropy is not distorted too much by the analysis filter so that it is well-described by the observed excess and deficit cones.

AB - The relative sidereal variation in the arrival direction of primary cosmic ray nuclei of median energy 10 TeV was measured using downward, through-going muons detected with the Super-Kamiokande-I detector. The projection of the anisotropy map onto the right ascension axis has a first harmonic amplitude of (6.64±0.98stat±0.55syst)×10-4 and a phase at maximum at (33.2°±8.2°stat±5.1°syst) right ascension. A sky map in equatorial coordinates indicates an excess region in the constellation of Taurus and a deficit region toward Virgo. The excess region is centered at (αT,δT)=(75°±7°,-5°±9°) with a half-opening angle χT=(39±7)°; the excess flux is (0.104±0.020)% above the isotropic expectation. The corresponding parameters for the deficit region are (αV,δV)= (205°±7°,5°±10°), χV=(54±7)°, and (-0.094±0.014)%. The data do not allow us to rule out a pure dipole form for the anisotropy (allowed at 13% confidence level); they are better described by the excess and deficit cones described above. We explored the implications under the assumption that the true anisotropy is not distorted too much by the analysis filter so that it is well-described by the observed excess and deficit cones.

UR - http://www.scopus.com/inward/record.url?scp=33947526037&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33947526037&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.75.062003

DO - 10.1103/PhysRevD.75.062003

M3 - Article

AN - SCOPUS:33947526037

SN - 1550-7998

VL - 75

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 6

M1 - 062003

ER -

Observation of the anisotropy of 10 TeV primary cosmic ray nuclei flux with the Super-Kamiokande-I detector

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