Search for Blazar Flux-Correlated TeV Neutrinos in IceCube 40-String Data

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We present a targeted search for blazar flux-correlated high-energy ($\varepsilon_\nu > 1$ TeV) neutrinos from six bright northern blazars, using the public database of northern-hemisphere neutrinos detected during "IC40" 40-string operations of the IceCube neutrino observatory (April 2008 to May 2009).

• Our six targeted blazars are subjects of long-term monitoring campaigns by the VERITAS TeV gamma-ray observatory.
• We use the publicly-available VERITAS lightcurves to identify periods of excess and flaring emission.
• These predefined intervals serve as our "active temporal windows" in a search for an excess of neutrinos, relative to Poisson fluctuations of the near-isotropic atmospheric neutrino background which dominates at these energies.