R. U. Abbasi (Author),
Mitsuhiro Abe (Author),
T. Abu-Zayyad (Author),
M. Allen (Author),
R. Anderson (Author),
R. Azuma (Author),
E. Barcikowski (Author),
J. W. Belz (Author),
D. R. Bergman (Author),
S. A. Blake (Author),
J. P. Lundquist (Author)
Abstract
We have searched for intermediate-scale anisotropy in the arrival directions of ultrahigh-energy cosmic rays with energies above 57 EeV in the northern sky using data collected over a 5 year period by the surface detector of the Telescope Array experiment. We report on a cluster of events that we call the hotspot, found by oversampling using 20∘-radius circles. The hotspot has a Li-Ma statistical significance of 5.1σ, and is centered at R.A.=146.7∘, Dec.=43.2∘. The position of the hotspot is about 19∘ off of the supergalactic plane. The probability of a cluster of events of 5.1σ significance, appearing by chance in an isotropic cosmic-ray sky, is estimated to be 3.7×10−4 (3.4σ).
Keywords
cosmic rays;large-scale structure;universe;surveys;
Data
Language: |
English |
Year of publishing: |
2014 |
Typology: |
1.01 - Original Scientific Article |
Organization: |
UNG - University of Nova Gorica |
UDC: |
524 |
COBISS: |
5615355
|
ISSN: |
2041-8205 |
Views: |
2356 |
Downloads: |
0 |
Average score: |
0 (0 votes) |
Metadata: |
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Other data
URN: |
URN:SI:UNG |
Type (COBISS): |
Not categorized |
Pages: |
str. 1-5 |
Volume: |
ǂVol. ǂ790 |
Issue: |
ǂno. ǂ2 |
Chronology: |
2014 |
DOI: |
10.1088/2041-8205/790/2/L21 |
ID: |
11578978 |