Distribution of the squared angular distance (θ²) between the reconstructed event direction and the nominal source direction. The filled histogram is the background estimation, obtained from sky regions within the field of view with similar detector acceptance. We show only data taken in dark condition (condition 1, see Appendix A). The standard MAGIC low energy (LE) cuts are applied to the data (see Appendix A and Table A.1). The vertical line corresponds to the optimal cut (θ² = 0.02 deg²) for point source analysis in LE cuts, used to derive significance values.