Example of afterglow light curve at z = 3 as a function of observed angle, θ_obs. We show the evolution of afterglow flux F(mJy) as a function of time t (days) and observed angle θ_obs for typical parameters: isotropic kinetic energy E_iso = 10⁵⁴ erg, electron spectral index p = 2.5, plasma parameters ϵ_e = 0.1, ϵ_B = 0.01, half-opening angle jet θ_j = 0.1, interstellar medium density n = 1 cm^-3 and frequency ν = 5 × 10¹⁴ Hz. The horizontal dotted line is the integrated Gaia flux limit; solid black line, θ_obs = 0; dashed blue line, θ_obs = 0.05; dot-dashed red line, θ_obs = 0.1; dotted green line, θ_obs = 0.20.