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The Antarctic Impulsive Transient Antenna (ANITA), a NASA long-durationballoon payload, searches for radio emission from interactions ofultra-high-energy neutrinos in polar ice. The third flight of ANITA (ANITA-III)was launched in December 2014 and completed a 22-day flight. We present theresults of three analyses searching for Askaryan radio emission of neutrinoorigin. In the most sensitive of the analyses, we find one event in the signalregion on an expected a priori background of $0.7^{+0.5}_{-0.3}$. Thoughconsistent with the background estimate, the candidate event remains compatiblewith a neutrino hypothesis even after additional post-unblinding scrutiny.

Constraints on the diffuse high-energy neutrino flux from the third flight of ANITA