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Abstract: The IceCube neutrino observatory, now completed with a total of 86 strings deployed, is the world’s largest high energy neutrino telescope. The detector instruments a cubic kilometer of Antarctic ice as a Cherenkov medium for the detection of neutrinos produced when cosmic rays interact with matter or radiation fields either near their acceleration sites or in the Earth’s atmosphere. The results of searches for neutrinos from astrophysical objects such as supernova remnants, active galactic nuclei, and gamma ray bursts, using data from the partially built detector, are presented. [Copyright &y& Elsevier]

Abstract: High energy neutrino astronomy is emerging as one of the most exciting options for studying astrophysical processes. To establish neutrino detectability from specific sources, neutrino telescopes of scale are needed. In order to complement the IceCube detector currently under construction in the South Pole, a corresponding Northern Hemisphere detector is needed. The three neutrino telescope projects in the Mediterranean, ANTARES, NEMO and NESTOR have joined forces in order to develop, prepare, construct and operate such a research facility, KM3NeT. To this end, the EU is funding a 3-year design study. In the present paper, the status of the design study is presented and options for the various technical problems are discussed. [Copyright &y& Elsevier]

The ANtarctic Impulse Transient Antenna (ANITA) is the first long-duration balloon experiment designed to search and measure the flux of Greisen–Zapsepin–Kuzmin (GZK) neutrinos. We present new limits on neutrinos fluxes of astronomical origin from data collected with the successful launch of a 2-antenna prototype instrument, called ANITA-lite, that circled the Antarctic continent for 18.4 days in January 2004. We performed a search for Ultra-High-Energy (UHE) neutrinos with energies above 3 × 1018 eV. No excess events above the background expectation were observed and a neutrino flux following E-2 spectrum for all neutrino flavors, is limited to $E_{\nu}^{-2}F < 1.6\times 10^{-6}~{\rm GeV~cm}^{-2}~{\rm s}^{-1}~{\rm sr}^{-1}$ for 1018.5eV < Eν < 1023.5eV at 90% confidence level. The launch of ANITA is scheduled for December 2006. Looking beyond ANITA, we describe a new idea, called ARIANNA (Antarctic Ross Iceshelf ANtenna Neutrino Array), to increase the sensitivity for GZK neutrinos by one order of magnitude better than ANITA. [ABSTRACT FROM AUTHOR]

Abstract: In 2006–2010, several radio frequency (RF) detectors and calibration equipment were deployed as part of the IceCube array at depths between 5 and 1400m in preparation for a future large scale GZK neutrino detector. IceCube''s deep holes and well-established data handling system provide a unique opportunity for deep-ice RF detection studies at the South Pole. We will present verification and calibration results as well as a status-review of ongoing analyses such as ice-properties, RF noise and reconstruction algorithms. [Copyright &y& Elsevier]