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Abstract: We extend the Maximum Likelihood method used by HiRes to study crosscorrelations between a catalog of candidate astrophysical sources and UltrahighEnergy Cosmic Rays UHECRs, to allow for differing source luminosities. Ourapproach permits individual sources to be ranked according to their likelihoodof having emitted the correlated UHECRs. We test both old and new method bysimulations for various scenarios. We conclude that there are 9 truecorrelation between HiRes UHECRs and known BLLacs, with a 6*10^-5 probabilityof such a correlation arising by chance.



Autor: Ronnie Jansson, Glennys R. Farrar

Fuente: https://arxiv.org/







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