2001/02/28 by P. G. Tinyakov, I. I. Tkachev · 1 citation
Physics and Astronomy · #Angular resolution (graph drawing) #Astrophysics and Cosmic Phenomena #Bin #Cluster analysis #Correlation #Correlation function (quantum field theory) #Cosmic ray #Dark Matter and Cosmic Phenomena #Distribution (mathematics) #Function (biology) #High-Energy Particle Collisions Research #Point (geometry) #astro-ph #hep-ph
paper · pdf · doi:10.1134/1.1402195
published as JETP Lett. 74 (2001) 1-5; Pisma Zh.Eksp.Teor.Fiz. 74 (2001) 3-7 · Replaced with the version accepted for publication in JETP Lett
arxiv created 2001/07/01 · openalex publication_date 2001/07/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We calculate the angular two-point correlation function of ultrahigh-energy cosmic rays (UHECR) observed in the AGASA and Yakutsk experiments. In both data sets, there is a strong signal at the highest energies, which is concentrated in the first bin of size equal to the angular resolution of the experiment. For the uniform distribution of sources, the probability of chance clustering is 4×10 −6 . Correlations are absent or insignificant at larger angles. This favors the models with compact sources of UHECR