Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-03-14
ECONF C041213:2516,2004
Astronomy and Astrophysics
Astrophysics
Presented at 22nd Texas Symposium on Relativistic Astrophysics at Stanford, Palo Alto, 13-17 December 2004, (TSRA04-2516) 6 pa
Scientific paper
The Antarctic Impulsive Transient Antenna (ANITA) experiment is being developed to search for ultra-high-energy (UHE) neutrino interactions ($>3\times10^{18}$ eV) in the Antarctic ice cap. A neutrino interaction in the ice will produce a radio pulse by the means of the Askaryan effect. The large radio transparency of ice allows for such a pulse to be recorded by a cluster of balloon-borne antennas. The details of the ANITA instrument, now in a construction phase, and the science we hope to achieve is discussed. In order to prepare for the main mission, we have flown ANITA-lite during the 2003/04 austral season. ANITA-lite consisted of two quad-ridge horn antennas and a prototype RF (radio frequency) triggering and recording system. Here we present the results of an impulsive RF background survey of Antarctica, as well as proof-of-principle gain, tracking, and timing calibrations conducted by observing solar radio emissions and calibration radio-pulses. A preliminary UHE neutrino flux limit based on ANITA-lite data is also presented.
Barwick Steve W.
Beatty James J.
Besson Dave Z.
Binns Robert W.
Cai Bin
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