Title: de Haas-van Alphen measurement of the antiferromagnet URhIn$_5$,
Abstract: We report on the results of a de Haas-van Alphen (dHvA) measurement performed
on the recently discovered antiferromagnet URhIn$_5$ ($T_N$ = 98 K), a
5\textit{f}-analogue of the well studied heavy fermion antiferromagnet
CeRhIn$_5$. The Fermi surface is found to consist of four surfaces: a roughly
spherical pocket $\beta$, with $F_\beta \simeq 0.3$ kT; a pillow-shaped closed
surface, $\alpha$, with $F_\alpha \simeq 1.1$ kT; and two higher frequencies
$\gamma_1$ with $F_{\gamma_1} \simeq 3.2$ kT and $\gamma_2$ with $F_{\gamma_2}
\simeq 3.5$ kT that are seen only near the \textit{c}-axis, and that may arise
on cylindrical Fermi surfaces. The measured cyclotron masses range from 1.9
$m_e$ to 4.3 $m_e$. A simple LDA+SO calculation performed for the paramagnetic
ground state shows a very different Fermi surface topology, demonstrating a
need for more advanced electronic structure calculations.