3σ or 50% completeness upper limits from the wide-field instrument follow-up campaign. The data used are referenced in Sect. 4.1. The kilonova models, representing an AT2017gfo-like evolution, are shifted to the luminosity distance measure from the LVC skymap (267 Mpc; LALInference.v1.fits), and the shaded regions represent the 1σ confidence interval (±52 Mpc). Absolute magnitudes assume a distance of 267 Mpc. Foreground extinction is not included.