Electronic supplementary materials to the paper The C(2)$^1\Pi_u$ state in Rb$_2$. Observation and deperturbation by Asen Pashov, Jacek Szczepkowski, Wlodzimierz Jastrzebski, Pawel Kowalczyk ========================================================================== Transition frequencies.dat Table I List of frequencies of all assigned transitions from the present study compared with the predictions of the CC model Energy levels.dat Table II List of all energy levels used in the fit compared with the predictions of the CC model potential curves.dat Table III Potential energy curves of the CC model Radial functions.dat Table IV Radial functions of the matrix elements of the CC model e-Matrix.dat Schematic diagram of the Hamiltonian matrix for e symmetry levels. f-Matrix.dat Schematic diagram of the Hamiltonian matrix for f symmetry levels.