Evolution of the normalized luminosity g_rad/g for burst 1 from 4U 1702−429. The surface fraction S_f constraints are also shown for model C, which is the only one of our models in which this parameter is free. The dotted black line with the scale on the right axis shows the corresponding standard deviation of the obtained parameter distributions. The intensity of the red coloring is proportional to the probability density. The constraints we find using these real RXTE data bear a clear similarity to the constraints from our synthetic data fits seen in Fig. 2.