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\begin{abstract}  Photon event centroiding in photon counting imaging and single-molecule localisation in super-resolution fluorescence microscopy share many traits. Although photon event centroiding has traditionally been achieved performed  with simple single-iteration algorithms, we recently reported that iterative algorithms originally developed for single-molecule localisation fluorescence microscopy works very well when applied to centroiding photon events imaged with an MCP-intensified CMOS camera. Here, have applied these algorithms for centroiding of photon events from an electron-bombarded CCD. We find that iterative centroiding algorithms yield excellent results and allow fitting of overlapping photon  events, a feature not reported before and an important aspect to facilitate an increased count rate and shorter acquisition times. \end{abstract}    \textbf{Keywords:} Photon counting imaging, single-molecule localisation, electron-bombarded CCD 
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