  Coefficients of super Jacobi polynomials of type $B(1,n)$ are rational
functions in three parameters $k,p,q$. At the point $(-1,0,0)$ these
coefficient may have poles. Let us set $q=0$ and consider pair $(k,p)$ as a
point of $\Bbb A^2$. If we apply blow up procedure at the point $(-1,0)$ then
we get a new family of polynomials depending on parameter $t\in \Bbb P$. If
$t=\infty$ then we get supercharacters of Kac modules for Lie supergroup
$OSP(2,2n)$ and supercharacters of irreducible modules can be obtained for
nonnegative integer $t$ depending on highest weight. Besides we obtained
supercharcters of projective covers as specialisation of some nonsingular
modification of super Jacobi polynomials.
