The Two Point Angular Autocorrelation Function and the Origin of the Highest Energy Cosmic Rays

R.W. Clay , B.R.Dawson , L. Kewley , M. Johnston-Hollitt, PASA, 17 (3), 207.
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Contents Page: Volume 17, Number 3

The Two Point Angular Autocorrelation Function and the Origin of the Highest Energy Cosmic Rays

R.W. Clay 1
B.R.Dawson 1
L. Kewley 2
M. Johnston-Hollitt 1

1 Department of Physics and Mathematical Physics, University of Adelaide, South Australia, 5005
rclay@physics.adelaide.edu.au

2 Research School of Astronomy and Astrophysics, Australian National University, Weston Creek PO, Weston, ACT 2611, Australia
lkewley@mso.anu.edu.au

Abstract:

Construction of the Pierre Auger Observatory for the study of the highest energy cosmic rays is about to begin. Prior to the availability of data from that experiment, decisions should be made on techniques for the analysis of the directional properties of those data. We examine here one possible analysis tool, the two point angular autocorrelation function. As a concrete example, data from the SUGAR array are examined in this way. Possible clustering of the data is observed and the identification of such clustering with candidate astronomical objects in a purpose developed catalogue is investigated.

Keywords: methods: data analysis - cosmic rays - galaxies: intergalactic medium





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