Best-fit BAGPIPES SED models for the Cosmic Gems Arc assuming a delayed-τ SFH and a SMC dust extinction law. The top panels show the fits to fluxes measured in the Kron Ellipse, while the bottom panels show the fits to segment photometry. The left panels show the best fits using the default BC03 stellar population models, while the right panels show the best fits using the BPASS stellar population models. The measured fluxes are shown as blue data points or triangle upper limits. Nondetections are plotted as upper limits at the 2σ level. The best-fit BAGPIPES SED model is shown in orange, with squares indicating the expected photometry in a given band. To the right of each SED, we also plot the P(z) posterior redshift probability distributions with the median z_phot and 95% confidence interval.