Signals from cosmic ray sources, some statistical issues

Details Signals from cosmic ray sources, some statistical issues Signals from cosmic ray sources, some statistical issues

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990hep..conf.....g&link_type=abstract

Presented at the 1990 DPF Summer Study on High Energy Physics, Snowmass, 25 Jun. - 13 Jul. 1990

Mathematics

Probability

Cosmic Rays, Gamma Rays, Probability Theory, Radiation Sources, Detection, Statistical Analysis

Scientific paper

The possible existence of discrete sources of cosmic rays is presently one of the main topics of study in non-accelerator particle physics. The search is being conducted in a wide variety of experiments using UHE gamma rays, VHE gamma rays, EeV particles, underground mu's and nu's. The current experimental situation, however, can be described as chaotic. The number of claimed observations of sources by different groups using a variety of experimental techniques is quite large, but a consistent interpretation of the various results has failed to emerge. Most of the observations rely on either a dc excess from the direction of the source, a periodicity of the events from that direction, or some combination of these two effects. In the first section of this paper, we discuss some of the techniques that may be used in searching for a dc excess. We review two common bin free tests of the light curves. We discuss a particular problem involving phase coherence when doing a period search. This paper discusses some of the issues and meanings involved in combining probabilities from more than one test. Prescribing the right way to do analysis is certainly beyond this paper's scope. However some of the issues and problems are considered here.

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