Search for Point Sources of Ultra--High-Energy Cosmic Rays Above 10^19 eV Using a Maximum Likelihood Ratio Test

Details Search for Point Sources of Ultra--High-Energy Cosmic Rays Above 10^19 eV Using a Maximum Likelihood Ratio Test Search for Point Sources of Ultra--High-Energy Cosmic Rays Above 10^19 eV Using a Maximum Likelihood Ratio Test

2005-07-25

arxiv.org/abs/astro-ph/0507574v1

Proc. 29th International Cosmic Ray Conference, Pune (2005) 7, pp. 397-400

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure. To be presented at the 2005 ICRC in Pune, India, in August

Scientific paper

We present the results of a search for cosmic ray point sources at energies above 10^19 eV in the HiRes stereo data set. 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. The search is extended to the combined data set of HiRes data above 10^19 eV and AGASA data above 4.0 10^19 eV. In both cases, no statistically significant clustering of events consistent with a point source is found.

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