Limits on transient occurrence per day N versus width-adjusted minimum flux , on a logarithmic scale, comparing previous fast-transient surveys (Kulkarni et al. 2008) with LPPS. The burst rates reported by Lorimer et al. (2007, L07) and Thornton et al. (2013, T13) are plotted with their errors. The area between the dashed lines represents a N( >S) ∝ S^{− 3 / 2} prediction from a homogeneous, stationary population of objects. The LPPS limit, which assumes a flat spectral index for the purposes of comparing with surveys at other frequencies, is seen near the center.