C (blue) and N (red) escape probability profiles in the upper Martian atmosphere for the pre-, during-, and post-flare stages, from left to right. The situations for photon and photoelectron impact processes are presented in the top and bottom rows, respectively. In the top row, we show the results for CO photolysis producing both ground (dashed) and excited (dash-dotted) state atoms, whereas in the bottom row, we do not distinguish between the two channels due to the lack of relevant cross section data.