  An unfolding measurement of the atmospheric neutrino flux at the South Pole
is performed using the IceCube/DeepCore detector. The main results presented is
the true neutrino interaction rate by unit volume of ice, as a function of
energy or zenith angle. The method used is the D'Agostini iterative unfolding.
While the detector response estimate is based on Monte Carlo simulation, the
iterative approach will compensate for this inherent bias and draw the unfolded
result closer to the unbiased estimator, as the number of iterations is
optimized. This is done using an ensemble test with a blind re-smearing
approach. Thus this measurement is minimally biased regarding atmospheric
flux-, oscillation- and neutrino interaction models, allowing model builders to
test their predictions against this measurement. As an aside, using the same
data set and methodology, we also present an unfolding measurement directly to
atmospheric neutrino flux.
