General Relativity is confirmed by the detections of gravitational waves by the LIGO-Virgo Collaboration. These detections may also provide evidence for physics beyond GR, since quantum gravity...Show moreGeneral Relativity is confirmed by the detections of gravitational waves by the LIGO-Virgo Collaboration. These detections may also provide evidence for physics beyond GR, since quantum gravity predicts modifications to the classically predicted waveforms from black hole mergers. These modifications predict echo signals from the original merger event. Recent work by Abedi et al. suggest the existence of such signals at the 2.51σ level for GW150914, GW151226, and LVT151012. However, our independent analysis finds that the significance level of these echoes are much lower, with p-values between 0.10 and 0.38. Therefore these echo signals appear to be similar to noise given the current template model.Show less
