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Livetime and sensitivity of the ARIANNA Hexagonal Radio Array

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arxiv 1509.00115 v1 pith:4VUVWOHD submitted 2015-09-01 astro-ph.IM astro-ph.HE

ARIANNA Collaboration: S.W.Barwick , E.C.Berg , D.Z.Besson , G.Binder , W.R.Binns , D.Boersma , R.G.Bose , D.L.Braun
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J.H.Buckley V.Bugaev S.Buitink K.Dookayka P.F.Dowkontt T.Duffin S.Euler L.Gerhardt L.Gustafsson A.Hallgren J.C.Hanson M.H.Israel J.Kiryluk S.Klein S.Kleinfelder A.Nelles H.Niederhausen M.A.Olevitch C.Persichelli K.Ratzlaff B.F.Rauch C.Reed M.Roumi A.Samanta G.E.Simburger T.Stezelberger J.Tatar U.Uggerhoj J.Walker R.Young
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keywords ariannaradioarraydetectorhexagonallivetimeneutrinosensitivity
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The ARIANNA collaboration completed the installation of the hexagonal radio array (HRA) in December 2014, serving as a pilot program for a planned high energy neutrino telescope located about 110 km south of McMurdo Station on the Ross Ice Shelf near the coast of Antarctica. The goal of ARIANNA is to measure both diffuse and point fluxes of astrophysical neutrinos at energies in excess of 1016 eV. Upgraded hardware has been installed during the 2014 deployment season and stations show a livetime of better than 90% between commissioning and austral sunset. Though designed to observe radio pulses from neutrino interactions originating within the ice below each detector, one station was modified to study the low-frequency environment and signals from above. We provide evidence that the HRA observed both continuous emission from the Galaxy and a transient solar burst. Preliminary work on modeling the (weak) Galactic signal confirm the absolute sensitivity of the HRA detector system.

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