In article ,
Jos Bergervoet writes:
Why are the 2 predicted curve in this picture slightly different?
https://www.ligo.caltech.edu/image/ligo20160211a

As the caption notes, one of the curves has to be inverted and
shifted by 7 ms because of the different detector locations and
orientations. The rest of the differences are presumably random
noise. The signal to noise is only 5 sigma, after all. Figure 1 of
the published paper is clearer.

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