Erratum to: Space Sci Rev DOI  10.1007/s11214-013-9982-9

Unfortunately, a mistake was introduced in Eq. (3.16) during the typesetting process of this article. Please find the correct equation below:

$$ P(\boldsymbol{u};\theta,\kappa) \cong \pi^{-\frac{3}{2}} \frac{\varGamma(\kappa+ 1)}{\varGamma(\kappa- \frac{1}{2})} \biggl[\biggl(\kappa- \frac{3}{2}\biggr)\theta^{2}\biggr]^{\kappa- \frac{1}{2}} \cdot\vert \boldsymbol{u} \vert^{ - 2\kappa- 2}. $$
(3.16)