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Samenvatting
A likely source of a gravitationalwave background (GWB) in the frequency band of the Advanced LIGO, Virgo and KAGRA detectors is the superposition of signals from the population of unresolvable stellarmass binaryblackhole (BBH) mergers throughout the Universe. Since the duration of a BBH merger in band ($\sim\!1~{\rm s}$) is much shorter than the expected separation between neighboring mergers ($\sim\!10^3~{\rm s}$), the observed signal will be "popcornlike" or intermittent with duty cycles of order $10^{3}$. However, the standard crosscorrelation search for stochastic GWBs currently performed by the LIGOVirgoKAGRA collaboration is based on a continuousGaussian signal model, which does not take into account the intermittent nature of the background. The latter is better described by a Gaussian mixturemodel, which includes a duty cycle parameter that quantifies the degree of intermittence. Building on an earlier paper by Drasco and Flanagan, we propose a stochasticsignalbased search for intermittent GWBs. For such signals, this search performs better than the standard continuous crosscorrelation search. We present results of our stochasticsignalbased approach for intermittent GWBs applied to simulated data for some simple models, and compare its performance to the other search methods, both in terms of detection and signal characterization. Additional testing on more realistic simulated data sets, e.g., consisting of astrophysicallymotivated BBH merger signals injected into colored detector noise containing noise transients, will be needed before this method can be applied with confidence on real gravitationalwave data.
Originele taal2  English 

Artikelnummer  103026 
Aantal pagina's  23 
Tijdschrift  Physical Review D 
Volume  107 
Nummer van het tijdschrift  10 
DOI's  
Status  Published  15 mei 2023 
Bibliografische nota
23 pages, 8 figures, 1 tableVingerafdruk
Duik in de onderzoeksthema's van 'A stochastic search for intermittent gravitationalwave backgrounds'. Samen vormen ze een unieke vingerafdruk.
FWOIRI15: Essentiële Technologieën voor de Einstein Telescoop
Sevrin, A., Vervaeke, M. & Mariotti, A.
1/01/23 → 31/12/26
Project: Fundamenteel

SRP72: SRPOnderzoekszwaartepunt: Hoge energie fysica (HEP@VUB)
D'Hondt, J., Buitink, S., Craps, B., De Vries, K., Lowette, S. & Mariotti, A.
1/11/22 → 31/10/27
Project: Fundamenteel

FWOTM1087: De stochastische achtergrond van gravitationele golven: van modellen tot observatie
Turbang, K., Mariotti, A. & Sevrin, A.
1/11/21 → 31/10/25
Project: Fundamenteel