Comparison of intrinsic parameters definitions across different NR codes

Numerical relativity codes developed over the past two decades employ different formulations of Einstein's equations, initial data schemes, and methods for gravitational-wave extraction. The next generation of GW detectors are expected to be sensitive to these systematic differences. Therefore, we are performing cross-validation studies focused on the definitions of intrinsic parameters used by different NR codes. Using a reference waveform model (e.g., NRSur7dq4), we will explore its parameter space to build a map identifying the parameters that match a chosen entry from a given catalog. In this way, we can systematically compare the intrinsic parameters of different NR codes and investigate how these differences affect waveform mismatches for nominally identical parameters.