Analysis of Ringdown Overtones in GW150914

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We analyze GW150914 postmerger data to understand if ringdown overtone detection claims are robust. We find no evidence in favor of an overtone in the data after the waveform peak. Around the peak, the Bayes factor does not indicate the presence of an overtone, while the support for a nonzero amplitude is sensitive to changes in the starting time much smaller than the overtone damping time. This suggests that claims of an overtone detection are noise dominated. We perform GW150914-like injections in neighboring segments of the real detector noise, and we show that noise can indeed induce artificial evidence for an overtone.

OriginalsprogEngelsk
Artikelnummer111102
TidsskriftPhysical Review Letters
Vol/bind129
Udgave nummer11
Antal sider7
ISSN0031-9007
DOI
StatusUdgivet - 9 sep. 2022

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