  We present a method to search for gravitational waves from coalescing
supermassive binary black holes in LISA data. The search utilizes the
$\mathcal{F}$-statistic to maximize over, and determine the values of, the
extrinsic parameters of the binary system. The intrinsic parameters are
searched over hierarchically using stochastically generated multi-dimensional
template banks to recover the masses and sky locations of the binary. We
present the results of this method applied to the mock LISA data Challenge 1B
data set.

General Relativity and Quantum Cosmology