Optical LC fit parameters for 179 GRBs

This correlation is between the rest-frame time at the end of the plateau emission, T_opt_^*^, its optical luminosity, Lopt, and the peak in the optical prompt emission, L_peak,opt_, thus resembling the three-dimensional (3D) X-ray fundamental plane (the so-called 3D Dainotti relation). We correct our sample for redshift evolution and selection effects, discovering that this correlation is indeed intrinsic to GRB physics.

We investigate the rest-frame end-time distributions in X-rays and optical (T_opt_^*^, T_X_^*^), and conclude that the plateau is achromatic only when selection biases are not considered. We also investigate if the 3D optical correlation may be a new discriminant between optical GRB classes and find that there is no significant separation between the classes compared to the Gold sample plane after correcting for evolution.