Multiscale autocorrelation function: a new approach to anisotropy studies

Abstract

We present a novel catalog-independent method, based on a scale dependent approach, to detect anisotropy signatures in the arrival direction distribution of the ultra highest energy cosmic rays (UHECR). The method provides a good discrimination power for both large and small data sets, even in presence of strong contaminating isotropic background. We present some applications to simulated data sets of events corresponding to plausible scenarios for charged particles detected by world-wide surface detector-based observatories, in the last decades.

18 pages, 9 figures

References in corpus (5)

• The Palermo Swift-BAT Hard X-ray Catalogue. II- Results after 39 months of sky survey
• A global autocorrelation study after the first Auger data: impact on the number density of UHECR sources
• First hints of large scale structures in the ultra-high energy sky?
• The 2pt+: an enhanced 2 point correlation function
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Cited by in corpus (2)

• Reinterpreting the development of extensive air showers initiated by nuclei and photons
• A Bayesian self-clustering analysis of the highest energy cosmic rays detected by the Pierre Auger Observatory