TY - JOUR
T1 - A morphology-independent search for gravitational wave echoes in data from the first and second observing runs of Advanced LIGO and Advanced Virgo
AU - Tsang, Ka Wa
AU - Ghosh, Archisman
AU - Samajdar, Anuradha
AU - Chatziioannou, Katerina
AU - Mastrogiovanni, Simone
AU - Agathos, Michalis
AU - Van Den Broeck, Chris
N1 - Funding Information:
The authors thank Vitor Cardoso, Gaurav Khanna, Alex Nielsen, and Paolo Pani for helpful discussions. K. W. T., A. G., A. S., and C. V. D. B. are supported by the research programme of the Netherlands Organisation for Scientific Research (NWO). S. M. was supported by a Short-Term Scientific Mission (STSM) grant from COST Action CA16104. This research has made use of data obtained from the Gravitational Wave Open Science Center ( https://www.gw-openscience.org ), a service of LIGO Laboratory, the LIGO Scientic Collaboration, and the Virgo Collaboration.
Publisher Copyright:
© 2020 American Physical Society.
PY - 2020/3/15
Y1 - 2020/3/15
N2 - 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 by Tsang et al. [Phys. Rev. D 98, 024023 (2018)PRVDAQ2470-001010.1103/PhysRevD.98.024023], 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.
AB - 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 by Tsang et al. [Phys. Rev. D 98, 024023 (2018)PRVDAQ2470-001010.1103/PhysRevD.98.024023], 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.
UR - http://www.scopus.com/inward/record.url?scp=85083569684&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.101.064012
DO - 10.1103/PhysRevD.101.064012
M3 - Article
AN - SCOPUS:85083569684
SN - 2470-0010
VL - 101
JO - Physical Review D
JF - Physical Review D
IS - 6
M1 - 064012
ER -