Title: The Gibbons-Hawking ansatz over a wedge,
Abstract: We discuss the Ricci-flat `model metrics' on $\mathbb{C}^2$ with cone
singularities along the conic $\{zw=1\}$ constructed by Donaldson using the
Gibbons-Hawking ansatz over wedges in $\mathbb{R}^3$. In particular we describe
their asymptotic behavior at infinity and compute their energies.