Search for Point Sources of Ultra–High‐Energy Cosmic Rays above 4.0 x 1019eV Using a Maximum Likelihood Ratio Test
- 10 April 2005
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 623 (1) , 164-170
- https://doi.org/10.1086/428570
Abstract
We present the results of a search for cosmic-ray point sources at energies in excess of 4.0 × 1019 eV in the combined data sets recorded by the Akeno Giant Air Shower Array and High Resolution Fly's Eye stereo experiments. The analysis is based on a maximum likelihood ratio test using the probability density function for each event rather than requiring an a priori choice of a fixed angular bin size. No statistically significant clustering of events consistent with a point source is found.Keywords
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