Black (red) line: 50% (90%) confidence region. The confidence region likelihood ratios were determined using Monte Carlo re-simulations of the event, taking into account uncertainties in the optical properties of the deep glacial ice. The best fit position is shown as a × mark and the position of PS16cgx is indicated with a star symbol. Furthermore, the other faint transients discovered within the final 90% probability containment by Pan-STARRS1 are also shown and contextually classified based on their host or precursor information as labeled in the legend.