Heavy line – nominal result for August 2000 exposure Light gray – range if signal strength varies by 2 Medium gray – range if attenuation length varies by 2 Dark gray – intersection of light and medium Effective volume is normalized to 2 pi sr – e.g. acceptance at 1 EeV is 12.4 km 3 sr

E nu = 3 EeV Red –Monte Carlo exposure Black –RICE hits Blue – Reconstructed positions for “thermal triggers” Separation of neutrino events from thermal background m m

RICE Monte Carlo Exposure at 1 EeV For downward flux, no events below the detector Attenuation increases with warmer temperatures near the bedrock

RICE concept RICE antenna & cable Neutrino enters ice Neutrino interacts Two cones show 3 dB signal strength Cube is.6 km on side

Limits on power law fluxes   Color  black1.5 red2.0 blue2.5 green3.0 orange3.5 Limits derived from absence of events consistent with neutrino induced radio pulses during Aug Line segments denote energy interval responsible for middle 80% of events.

Limits on power law fluxes   Color  black1.5 red2.0 blue2.5 green3.0 orange3.5 Note: This version of the power law flux limits plot follows George’s presentation. It is E dN/dE as opposed to E 2 dN/dE, and is per yr instead of per second. The other version is more industry standard.

Limits on model fluxes Limits derived from absence of events consistent with neutrino induced radio pulses during Aug Line segments denote energy interval responsible for middle 80% of events. Color model blackGZK redAGN-1 blueAGN-2 greenAGN-3 orangeTopological

Limits on power law fluxes Note: This version of the model flux limits plot follows George’s presentation. It is E dN/dE as opposed to E 2 dN/dE, and is per yr instead of per second. The other version is more industry standard. Color model blackGZK redAGN-1 blueAGN-2 greenAGN-3 orangeTopological