A comparison of the masses for each of the GJ 9827 planets, as determined from SYSTEMIC (S, circles) and RADVEL (R, diamonds) best-fits (BF), MCMC medians (MM), and (for SYSTEMIC) bootstrap medians (BM). The results of planet b are plotted in purple, planet c in orange, and planet d in green. The error bars on each point correspond to the 1σ errors; SYSTEMIC does not report errors on the best-fit parameters. The MCMC results from SYSTEMIC are plotted with arrows to represent upper limits.