Hybrid Wave-forms for Precessing binary black holes for LIGO data analysis*

We construct hybrid waveforms of precessing binary black holes by 
combining numerical relativity waveforms with analytical models.  More 
specifically, we use the  analytical models for the slow  inspiral phase 
and numerical relativity waveforms for the faster inspiral, merger, and 
ring-down phases. To hybridize, we align the two waveforms in the 
co-precessing frame and then find appropriate rotations and time 
translations that maximize the overlap of the two waveforms in a 
hybridization interval. We discuss the accuracy and limitations for such 
hybrids in the context of LIGO observations.