Common projects IceCube – Antares ?

Simulation

Physics Analysis

DAQ synchronization

J. Brunner

Simulation

• Cosmic ray spectrum– Large theoretical error on CR composition and

spectrum in the knee region– Large variety of hadronic shower models to derive

muon fluxes– Possible common effort on data/MC comparisons and

eventually recommendation for best model• Photon propagation

– Light diffusion in ice and water critical point in simulation chain

– CPU time consuming, approximate– Possible common effort to improve corresponding

simulation techniques

Physics Analysis

• Use completed analyses of both collaborations after unblinding has been agreed

• Combine results if possible and useful• Example: point source search

– Complementary in sky coverage– 2007 / IC22 analysis finished– Need individual neutrino list– PSF per event (or zenith/azimuth dependent)– Efficiency functions– Possible result: 4 sky map– Cluster search in overlap region (25% at any given

moment, 70% of IceCube sky seen by Antares at some moment)

Physics Analysis

• Example GRB stacking analysis– Time and direction constraint– Single event typically significant– Combine Antares/Icecube GRB lists might

increases overall sensitivity

DAQ synchronizationMulti-messenger

• Antares– GRB alerts from Swift & Fermi

• Storage of unfiltered data, higher efficiency at low E

– Optical follow up with Tarot– Offline analysis with Auger and Virgo

• Icecube– SuperNovae alert network– Optical follow up with Rotse– Gamma ray follow up with Magic– Offline analysis GRB, Ligo

Multi-messenger

• Try to combine both network• Most direct

– Send alerts from Icecube to Antares– Same selection as for optical follow up ?– Only for upward going in both devices with reduced

cuts ?– Include high energy event sample ?– Blindness concern

• Antares does not need directional information for alert handling

• Icecube might send “fake” alerts