  Multi-messenger astronomy is of great interest. The localization speed of
gravitational wave sources is important for the success of electromagnetic
follow-up. Although current gravitational wave source localization methods take
up to a few seconds, even that is not sufficient for some electromagnetic
bands. Therefore, one needs a more rapid localization method even if it is less
accurate. Building upon an Excess power method, we describe a new localization
method for compact object collisions that produces posterior probability maps
in only a few hundred milliseconds. Some accuracy is lost, with the searched
sky areas being approximately $10$ times larger. We imagine this new technique
playing a role in a hierarchical scheme where fast early location estimates are
iteratively improved upon as better analyses complete on longer time scales.
