An Improved Ultra-High Energy Cosmic-Ray Point-Source Anisotropy Scan Method*

The anisotropy scan of ultra-high energy cosmic ray events against a catalog of proposed point-sources has traditionally not incorporated measurement uncertainties, allowing a possible sensitivity to spurious correlation. This updated method folds measurement uncertainties into the scan statistics, implements a post-trial p-value process, and estimates scan result uncertainties using event-set bootstrapping. Simulated event sets are used to asses the efficacy of these changes and provide an exemplar case in lieu of measured cosmic ray events.