Spatio-temporal occurrence of temperature maxima. Bottom row, left to right: intensity maps at λ = 396.724, 396.822, and 396.851 nm. The horizontal white/black bars mark the locations of the active/reference pixel used before. Middle row, left to right: energy density at heights of log τ = −1.6, −3.3, and − 4.6 at the time of temperature maxima. Top: complementary map of energy density on all other locations.