  A certain type of matter with anisotropic pressures can add to the
Reissner-Nordstr\"om metric a term proportional to a power of the radial
coordinate. Using the standard method of separating variables for the
Hamilton-Jacobi equation, we study the shadow of the corresponding rotating
solution, obtained through the Newman-Janis algorithm. We define and calculate
three observables in order to characterize the position, size and shape of the
shadow.
