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A morphology-independent search for gravitational wave echoes in data from the first and second observing runs of Advanced LIGO and Advanced Virgo

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arxiv 1906.11168 v1 pith:ZYO7YC7N submitted 2019-06-26 gr-qc

Ka Wa Tsang , Archisman Ghosh , Anuradha Samajdar , Katerina Chatziioannou , Simone Mastrogiovanni , Michalis Agathos , Chris Van Den Broeck This is my paper · ORCID
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keywords advancedechoesbinarygravitationalsignalwavedatafirst
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abstract

Gravitational wave echoes have been proposed as a smoking-gun signature of exotic compact objects with near-horizon structure. Recently there have been observational claims that echoes are indeed present in stretches of data from Advanced LIGO and Advanced Virgo immediately following gravitational wave signals from presumed binary black hole mergers, as well as a binary neutron star merger. In this paper we deploy a morphology-independent search algorithm for echoes introduced in Tsang et al., Phys. Rev. D 98, 024023 (2018), which (a) is able to accurately reconstruct a possible echoes signal with minimal assumptions about their morphology, and (b) computes Bayesian evidences for the hypotheses that the data contain a signal, an instrumental glitch, or just stationary, Gaussian noise. Here we apply this analysis method to all the significant events in the first Gravitational Wave Transient Catalog (GWTC-1), which comprises the signals from binary black hole and binary neutron star coalescences found during the first and second observing runs of Advanced LIGO and Advanced Virgo. In all cases, the ratios of evidences for signal versus noise and signal versus glitch do not rise above their respective "background distributions" obtained from detector noise, the smallest $p$-value being 3% (for event GW170823). Hence we find no statistically significant evidence for echoes in GWTC-1.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Quasinormal Ringdown and Echoes in Accreting Exotic Compact Objects

    gr-qc 2026-07 conditional novelty 6.0 of 10

    Echoes from an accreting exotic compact object are progressively compressed and suppressed, then vanish when the event horizon overtakes the reflecting surface, after which the signal becomes ordinary black-hole ringdown.

  2. Waveform stability of black hole ringdown with stochastic horizon structure

    gr-qc 2026-02 conditional novelty 6.0 of 10

    Ringdown waveforms are robust against small-scale stochastic horizon fluctuations; only coherent, macroscopic horizon structure with ε≳10^-4 and L_c∼M could produce observable deviations.

  3. Model-agnostic search of gravitational wave echoes in LVK data

    gr-qc 2025-12 conditional novelty 6.0 of 10

    A multi-detector phase-marginalized echo search finds no statistically significant long-lived quasinormal-mode echoes in GW150914, GW231226, and GW250114, and sets 90% upper limits on their network SNR and amplitude.

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