Line formation through an Ellerman bomb. Panel a: Temperature slice across the atmosphere with h(τ_λ = 1) overplotted for the different line cores of Hε, Ca II H, and Ca II 854.2 nm and the wing of Hα at 656.35 nm. The inset shows a zoomed-in view around the Ellerman bomb, excluding h(τ_λ = 1) of Hε; there is a different temperature scale on top. Panel b: Relative contribution function at the maximum h(τ_λ = 1) over the Hε profile.