Methods for point source analysis in high energy neutrino telescopes

Details Methods for point source analysis in high energy neutrino telescopes Methods for point source analysis in high energy neutrino telescopes

2008-01-10

arxiv.org/abs/0801.1604v1

Astropart.Phys.29:299-305,2008

Astronomy and Astrophysics

Astrophysics

pdfLaTeX, 16 pages, 12 figures. Submitted to Astroparticle Physics

Scientific paper

10.1016/j.astropartphys.2008.02.

Neutrino telescopes are moving steadily toward the goal of detecting astrophysical neutrinos from the most powerful galactic and extragalactic sources. Here we describe analysis methods to search for high energy point-like neutrino sources using detectors deep in the ice or sea. We simulate an ideal cubic kilometer detector based on real world performance of existing detectors such as AMANDA, IceCube, and ANTARES. An unbinned likelihood ratio method is applied, making use of the point spread function and energy distribution of simulated neutrino signal events to separate them from the background of atmospheric neutrinos produced by cosmic ray showers. The unbinned point source analyses are shown to perform better than binned searches and, depending on the source spectral index, the use of energy information is shown to improve discovery potential by almost a factor of two.

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