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WIP: first cut at adding time domain NR support

Sebastian Khan requested to merge sebastian-khan/bilby:add-nr-support into master

Hi, I was playing around with the code and thought that I could try and add support to call time domain NR waveforms through the lalsimulation interface.

It's just a rough cut for now but I thought I could get some feedback on this first.

There is an example script which makes a plot too.

If you don't have an NR waveform from the lvcnr_lfs repo you can get a waveform from CIT. For example

numrel_file = "/home/sebastian.khan/ligo-nr-data/lvcnr-lfs/SXS/SXS_BBH_0058_Res5.h5"

So edit that line in the example script to get it to work. The example shows a precessing simulation.

Let me know what you think!

To get frequency domain support one needs to compute the FT and appropriately window data.

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