Best-fitting SED for REBELS-12 derived using prospector, and assuming a non-parametric SFH (blue) and a CSFH (red). Observed photometry is shown in black. Photometric points derived from the best-fitting SEDs assuming a non-parametric SFH and CSFH are displayed as blue squared and red diamonds, respectively. This indicates how different assumed SFHs lead to varying estimates of the stellar mass. The inset panel shows the derived SFR for the prospector non-parametric SFH and CSFH models as a function of lookback time. For this object we find a best-fitting stellar mass of |$\log (M_*/\mathrm{M}_{\odot })=8.93^{+0.55}_{-0.46}$| when assuming a CSFH, and |$\log (M_*/\mathrm{M}_{\odot })=9.93^{+0.42}_{-0.32}$| for a non-parametric SFH.