F160W simulated flux at z = 3.25 as a function of SFR and age, assuming a constant SFR evolution. The solid and dash-dotted black lines are the 1σ and 2σ confidence intervals of the measured flux of galaxy G_W (a) and G_E (b). The white line marks the age of the Universe at z = 3.25 (i.e., t = 1.97 Gyr); based on this age, the average SFR of the two sources is inferred to be SFR_GW = 5.0 ± 0.4 M_⊙ yr⁻¹ and SFR_GE = 0.70 ± 0.20 M_⊙ yr⁻¹.