Yes, in this case the theoretical models predict a gravitational wave to coincide with the observations from other trusted instruments. There may be systematic

Yes, in this case the theoretical models predict a gravitational wave to coincide with the observations from other trusted instruments. There may be systematic issues with LIGO's analysis, but it would appear that LIGO also reliably detects astronomical events which suggests that it does actually detect the waves themselves and not just coincidental artifacts in the analysis.