Monopole supersymmetries and the Biedenharn operator

The hidden supersymmetry of the monopole found by De Jonghe et al. is generalized to a spin $\text{2}$ particle in the combined field of a Dirac monopole plus a ${\lambda }^2\mathrm{/}{r}^2$ potential [considered before by D’Hoker and Vinet], and related to the operator introduced by Biedenharn a long time ago in solving the Dirac-Coulomb problem. Explicit solutions are obtained by diagonalizing the Biedenharn operator