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I have read in many sources that Numerical relativity produces a general solution for the waveforms which are to be expected by LIGO data to identify the different masses which are observed .

Can anyone tell me how to perform numerical relativity to generate waveforms for any two given set of masses ?

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There are specialized codes such as the SpEC (and others). The easiest way to learn how to use these would be to join a research program with numerical relativity experts.

There are many precalculated waveforms produced by such codes also available for use such as in the SXS catalog.

In addition, there are many models which can be used to generate gravitational waveforms, which are derived from post-newtonian theory and/or fits to numerical relativity simulations. Many of these can be produced by the PyCBC package. There are some interactive examples that one can try in the browser.

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