  We study the moment generating function of the disk counting statistics of a
two-dimensional determinantal point process which generalizes the complex
Ginibre point process. This moment generating function involves an $n \times n$
determinant whose weight is supported on the whole complex plane, is
rotation-invariant, and has discontinuities along circles centered at $0$.
These discontinuities can be thought of as a two-dimensional analogue of
jump-type Fisher-Hartwig singularities. In this paper, we obtain large $n$
asymptotics for this determinant, up to and including the term of order
$n^{-\smash{\frac{1}{2}}}$. We allow for any finite number of discontinuities
in the bulk, one discontinuity at the edge, and any finite number of
discontinuities bounded away from the bulk. As an application, we obtain the
large $n$ asymptotics of all the cumulants of the disk counting function up to
and including the term of order $n^{-\smash{\frac{1}{2}}}$, both in the bulk
and at the edge. This improves on the best known results for the complex
Ginibre point process, and for general values of our parameters these results
are completely new. Our proof makes a novel use of the uniform asymptotics of
the incomplete gamma function.
