@article{6f0f69d0a98e4655b1d91baba1948222,
title = "Observation of anisotropy in the galactic cosmic-ray arrival directions at 400 TeV with IceCube",
abstract = "In this paper we report the first observation in the Southern hemisphere of an energy dependence in the Galactic cosmic-ray anisotropy up to a few hundred TeV. This measurement was performed using cosmic-ray-induced muons recorded by the partially deployed IceCube observatory between 2009 May and 2010 May. The data include a total of 33 × 109 muon events with a median angular resolution of ∼3°. A sky map of the relative intensity in arrival direction over the Southern celestial sky is presented for cosmic-ray median energies of 20 and 400 TeV. The same large-scale anisotropy observed at median energies around 20 TeV is not present at 400 TeV. Instead, the high-energy sky map shows a different anisotropy structure including a deficit with a post-trial significance of .6.3σ. This anisotropy reveals a new feature of the Galactic cosmic-ray distribution, which must be incorporated into theories of the origin and propagation of cosmic rays.",
keywords = "astroparticle physics, cosmic rays, neutrinos",
author = "{Icecube Collaboration} and R. Abbasi and Y. Abdou and T. Abu-Zayyad and M. Ackermann and J. Adams and Aguilar, {J. A.} and M. Ahlers and Allen, {M. M.} and D. Altmann and K. Andeen and J. Auffenberg and X. Bai and M. Baker and Barwick, {S. W.} and R. Bay and {Bazo Alba}, {J. L.} and K. Beattie and Beatty, {J. J.} and S. Bechet and Becker, {J. K.} and Becker, {K. H.} and Benabderrahmane, {M. L.} and S. BenZvi and J. Berdermann and P. Berghaus and D. Berley and E. Bernardini and D. Bertrand and Besson, {D. Z.} and D. Bindig and M. Bissok and E. Blaufuss and J. Blumenthal and Boersma, {D. J.} and C. Bohm and D. Bose and S. B{\"o}ser and O. Botner and Brown, {A. M.} and S. Buitink and Caballero-Mora, {K. S.} and M. Carson and D. Chirkin and B. Christy and F. Clevermann and S. Cohen and C. Colnard and Cowen, {D. F.} and {Cruz Silva}, {A. H.} and D'Agostino, {M. V.}",
note = "Publisher Copyright: {\textcopyright} 2012. The American Astronomical Society. All rights reserved.",
year = "2012",
month = feb,
day = "10",
doi = "10.1088/0004-637X/746/1/33",
language = "English",
volume = "746",
journal = "Astrophysical Journal",
issn = "0004-637X",
number = "1",
}