We propose to use the OSIRIS spectrometer to measure the inelastic magnetic scattering on the newly discovered heavy Fermion compound Ce3Co4Sn13. This compound has one of the largest values of the linear coefficient of specific heat reported, and as such must reside very close to a T = 0 quantum critical point (QCP). Our goal is to determine whether the scattering near the QCP can be understood in terms of a weak-coupling system undergoing a Fermi surface instability, or in terms of a locally critical spin fluctuation. Ce3Co4Sn13 has excellent properties for a neutron scattering study: large crystals are available, neutron absorption is low, and a small magnetic field is sufficient to tune the magnetic correlations. OSIRIS will allow the high resolution necessary and will also allow measurement over a large portion of the Brillouin zone, yielding an overview of the Q-dependence.