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The High Energy Stereoscopic System (H.E.S.S.) very high energy gamma-raytelescope array has added a fifth telescope of 600 m$^{2}$ mirror area to thecentre of the 4 existing telescopes, lowering its energy threshold to thesub-100 GeV range and becoming the first operational IACT array using multipletelescope designs. In order to properly access this low-energy range however,some adaptation must be made to the existing event analysis. We present anadaptation of the high-performance event reconstruction algorithm, ImagePixelwise fit for Atmospheric Cherenkov Telescopes (ImPACT), for performingmono and stereo event reconstruction with the H.E.S.S. II array. Thereconstruction algorithm is based around the likelihood fitting of camera pixelamplitudes to an expected image template, directly generated from Monte Carlosimulations. This advanced reconstruction is combined with a multi variateanalysis based background rejection scheme to provide a sensitive and stableanalysis scheme in the sub-100 GeV gamma-ray energy range. We will present thelatest results of the ImPACT analysis on both simulated and real H.E.S.S. IIdata, demonstrating the behaviour of the ImPACT analysis at the lowestenergies.

HESS II Data Analysis with ImPACT