Indications of Intermediate-Scale Anisotropy of Cosmic Rays with Energy Greater Than 57 EeV in the Northern Sky Measured with the Surface Detector of the Telescope Array Experiment
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).
2014
2020-04-24 18:20:07
1033
acceleration of particles, cosmic rays, large-scale structure of universe, surveys
r6
R.U.
Abbasi
70
Jon Paul
Lundquist
70
COBISS_ID
3
5615355
DOI
15
10.1088/2041-8205/790/2/L21
NUK URN
18
URN:SI:UNG:REP:TV7SLGDN
Abbasi_2014_ApJL_790_L21.pdf
542526
Predstavitvena datoteka
2020-04-24 18:21:50
0
Izvorni URL
2020-04-24 18:21:40