Performance study of Cascade Reconstruction at the Glashow Resonance in IceCube

The IceCube observatory is a $1\,\mbox{km}^3$ neutrino detector located at the South Pole. Of particular interest are electromagnetic and/or hadronic particle showers (cascades) induced by electron anti-neutrinos that scatter of atomic electrons in ice, the so-called Glashow Resonance, i.e. $W^-$ production at $E_\nu=6.3\,\mbox{PeV}$. We present performance studies of likelihood based cascade reconstruction algorithms using Monte Carlo simulations and demonstrate IceCube's capabilities to reconstruct position, direction and the energy of cascades from the in-situ laser light sources in this energy regime.