The ANtarctic Impulsive Transient Antenna (ANITA) experiment is a balloon-borne radio telescope that, unlike most telescopes, points down in order to try to capture the impulsive Askaryan radio emission from energetic (>1 EeV) neutrinos interacting in the Antarctic ice sheet. Neutrinos at these energies have not yet been detected, but can be produced in interactions of cosmic rays with the cosmic microwave background or directly in astrophysical sources. ANITA is also sensitive to radio signals from extensive air showers, which are usually initiated by cosmic rays but could also potentially be produced by energetic tau neutrinos or exotic particles.
After four flights, ANITA sets the world's most stringent limits on ultrahigh energy neutrino flux above 30 EeV and additionally has detected dozens of extensive air shower candidates. Several of the observed events appear consistent with upward-going air showers, which currently lack a clear explanation. The Payload for Ultrahigh Energy Observations (PUEO) is the planned successor to the ANITA program, which will include significant sensitivity improvements.
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2020-08-13T16:00:002020-08-13T17:00:00Exploring the Ultrahigh-Energy Universe with ANITAEvent Information:
The ANtarctic Impulsive Transient Antenna (ANITA) experiment is a balloon-borne radio telescope that, unlike most telescopes, points down in order to try to capture the impulsive Askaryan radio emission from energetic (>1 EeV) neutrinos interacting in the Antarctic ice sheet. Neutrinos at these energies have not yet been detected, but can be produced in interactions of cosmic rays with the cosmic microwave background or directly in astrophysical sources. ANITA is also sensitive to radio signals from extensive air showers, which are usually initiated by cosmic rays but could also potentially be produced by energetic tau neutrinos or exotic particles.
After four flights, ANITA sets the world's most stringent limits on ultrahigh energy neutrino flux above 30 EeV and additionally has detected dozens of extensive air shower candidates. Several of the observed events appear consistent with upward-going air showers, which currently lack a clear explanation. The Payload for Ultrahigh Energy Observations (PUEO) is the planned successor to the ANITA program, which will include significant sensitivity improvements.
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