Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.3211l&link_type=abstract
American Astronomical Society, HEAD meeting #11, #32.11; Bulletin of the American Astronomical Society, Vol. 41, p.705
Astronomy and Astrophysics
Astronomy
Scientific paper
We use recent analytic aperture scaling laws of Gayley et al. (2009) to investigate optimal observing strategies for lunar-target UHE neutrino searches. We apply these results to evaluate using next-generation radio telescope arrays (e.g. LOFAR, LWA, MWA, SKA), as well as proposed searches using existing arrays (e.g. GMRT, GLINT) for UHE neutrino searches. We find that there is a significant trade-off between minimum detectable neutrino energy, which favors higher observing frequencies, and event rate, which favors lower frequencies. For a given target neutrino energy, the detection rate is optimized when the dimensionless factor f0 0.9, where f0 depends only on the ratio of maximum electric field in the Cerenkov pulse to the minimum detectable field at the least sensitive detector in the telescope array. We find that of all present and future ground-base searches, only the full SKA has sufficient sensitivity to probe energies near the GZK limit. Even with SKA, the search will be resource-expensive, since the expected GZK event rate may be only a few counts per observing month.
Gayley Ken G.
Jaeger T. R.
Lucien Mutel Robert
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