Outburst of comet 41P observed on 2017 May 11. We show the isophote pattern of the comet in the SDSS r filter (left panel), the respective Laplace-filtered result (middle panel), and the radially normalized pattern (right panel). The images cover 22 400 × 22 400 km of the coma at the distance of the comet. North is up, east is to the left. In the Laplace-filtered image, various coma structures are marked: the arc, the jet, the lineaments (Lin) from the outburst, the fan, and the dust tail from the normal activity of the comet. Other features are noise patterns or originate from charge overflows.