International School of Cosmic Ray Astrophysics

15^th  Course: "Astrophysics at Ultra-high Energies"

 20-27 June 2006
Ettore Majorana Centre
Erice, Sicily, Italy

Topic: First Results from AMANDA using transient waveform recorders.
Lecturer: Andrea Silvestri

The Antarctic Muon And Neutrino Detector Array (AMANDA) is now incorporated into the larger detector, IceCube. AMANDA has been taking data since 2000 and its data acquisition electronics was upgraded in January 2003 to readout the complete waveforms from the buried Photomultipliers (PMTs) using Transient Waveform Recorders (TWR). The TWR system is complementary to the standard AMANDA data acquisition system. We report results from a atmospheric neutrino analysis on data collected in 2003 with TWR. Good agreement in event rate and angular distribution verify the performance of the TWR system. A search of the northern hemisphere for localized event clusters shows no statistically significant excess. I will also update the status of a search for diffusely distributed neutrinos with ultra high energy using data collected by the TWR system.