First Year Performance Paper - Section 5
5 Air-showers in IceCube
As an air-shower detector, IceCube will have an unprecedented area for detecting high-energy muons in the deep detector in coincidence with the shower front at the surface. Typical muons observed at 2 km depth have energies of 400 GeV or more at production in the atmosphere. The signal from the shower front at the surface is primarily due to electrons and photons with energies below 1 GeV, with an additional contribution from muons in the GeV energy range. The current four stations and one string are already adequate to demonstrate the reconstruction of air-showers in IceCube.