  We present the high-temperature expansion up to 11th order for the specific
heat $C$ and the uniform susceptibility $\chi_0$ and up to 9th order for the
structure factor $S_{\bf Q}$ of the frustrated spin-half $J_1$-$J_2$ Heisenberg
model on the BCC lattice. We consider ferromagnetic as well as
antiferromagnetic nearest-neighbor exchange $J_1$ and frustrating
antiferromagnetic next-nearest-neighbor exchange $J_2$. We discuss the
influence of frustration on the temperature dependence of these quantities.
Furthermore, we use the HTE series to determine the critical temperature $T_c$
as a function of the frustration parameter $J_2$.
