Search for neutrinos from Cygnus X-3 with IceCube and AMANDA

Cygnus X-3 is a microquasar with very strong radio flares and associated jets. Observations reveal high densities and strong photon absorption in the system. Recently, the Fermi and AGILE space telescopes detected gamma-ray emission from Cygnus X-3 up to energies of 100 GeV correlated with the radio flaring and jet production. TeV photons have not been detected yet. Assuming hadronic processes, TeV neutrinos can escape in large numbers while TeV photons are absorbed and therefore not detected. This motivates a search for neutrinos from Cygnus X-3. We have developed a technique to identify periods of flaring activity from X-ray and radio monitoring data. The multi-wavelength information was used in an analysis of data from the neutrino telescopes IceCube and AMANDA, enhancing sensitivity compared to a time-integrated analysis. The analysis method and results are presented in this talk. No hints for a neutrino signal from Cygnus X-3 during or near the times of flaring were found and the observation is consistent with background.