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Searches for gravitational waves (GWs) from binary black holes usinginterferometric GW detectors require the construction of template banks forperforming matched filtering while analyzing the data. Placement of templatesover the parameter space of binaries, as well as coincidence tests of GWtriggers from multiple detectors make use of the definition of a metric overthe space of gravitational waveforms. Although recent searches have employedwaveform templates coherently describing the inspiral, merger and ringdown(IMR) of the coalescence, the metric used in the template banks and coincidencetests was derived from post-Newtonian inspiral waveforms. In this paper, wecompute the template-space metric of the IMR waveform family IMRPhenomB overthe parameter space of masses and the effective spin parameter. We also proposea coordinate system, which is a modified version of post-Newtonian chirp timecoordinates, in which the metric is slowly varying over the parameter space.The match function analytically computed using the metric has excellentagreement with the "exact" match function computed numerically. We show thatthe metric is able to provide a reasonable approximation to the match functionof other IMR waveform families, such that the effective-one-body modelcalibrated to numerical relativity (EOBNRv2). The availability of this metriccan contribute to improving the sensitivity of searches for GWs from binaryblack holes in the advanced detector era.

Template-space metric for searches for gravitational waves from the inspiral, merger and ringdown of binary black holes