Comparison of unknown gravitational-wave signals in two detectors

We present a new measure that can be used to test the hypothesis that a similar signal has been recorded in the strains of two gravitational-wave detectors, without recurring to a priori templates or whitening of the strains. For an evaluation of its properties we apply our measure to the LIGO data...

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Bibliographic Details
Published in:Astrophysics and space science 2024, Vol.369 (1), p.12, Article 12
Main Author: Moreschi, Osvaldo M.
Format: Article
Language:English
Subjects:
Astrobiology
Astronomy
Astrophysics and Astroparticles
Collaboration
Confidence intervals
Cosmology
Detectors
Gravitational waves
Hypotheses
Methods
Observations and Techniques
Observatories
Physics
Physics and Astronomy
Sensors
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
Time series
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Summary:We present a new measure that can be used to test the hypothesis that a similar signal has been recorded in the strains of two gravitational-wave detectors, without recurring to a priori templates or whitening of the strains. For an evaluation of its properties we apply our measure to the LIGO data of the GW150914 event and detect the existence of a similar signal with 99.99% confidence level. We also use the new measure to study the strains in the gravitational-wave observatories for the events 151012_2, GW151012, GW170104 and GW190521; covering in this way a variety of different situations. In addition we compare our measure with other standard measures and find that it is stronger for the studied data. Thus we are presenting a new powerful tool for the systematic study of unknown gravitational-wave signals in two or more observatories.
ISSN:0004-640X
1572-946X
DOI:10.1007/s10509-024-04276-9