  While dealing with a Hamiltonian with continuous spectrum we use a
tridiagonal method involving orthogonal polynomials to construct a set of
coherent states obeying a Glauber-type condition. We perform a Bayesian
decomposition of the weight function of the orthogonality measure to show that
the obtained coherent states can be recast in the Gazeau-Klauder approach. The
Hamiltonian of the $\ell$-wave free particle is treated as an example to
illustrate the method.
