Search for gravitational wave signals from known pulsars in LIGO-Virgo O3 data using the 5n -vector ensemble method

D'Onofrio, Luca; De Rosa, Rosario; Palomba, Cristiano; Leaci, Paola; Piccinni, Ornella J.; Sequino, Valeria; Errico, Luciano; Trozzo, Lucia; Palfreyman, Jim; McKee, James W.; Meyers, Bradley W.; Stairs, Ingrid; Guillemot, Lucas; Cognard, Ismaël; Theureau, Gilles; Keith, Michael J.; Lyne, Andrew; Flynn, Chris; Stappers, Ben

Abstract

The 5n-vector ensemble method is a multiple test for the targeted search of continuous gravitational waves from an ensemble of known pulsars. This method can improve the detection probability by combining the results from individually undetectable pulsars if few signals are near the detection threshold. In this paper, we apply the 5n-vector ensemble method to the O3 dataset from the LIGO and Virgo detectors considering an ensemble of 201 known pulsars. We find no evidence for a signal from the ensemble and set a 95% credible upper limit on the mean ellipticity assuming a common exponential distribution for the pulsars' ellipticities. Using two independent hierarchical Bayesian procedures, we find upper limits of 1.2×10-9 and 2.5×10-9 on the mean ellipticity for the 201 analyzed pulsars.

Citation

D'Onofrio, L., De Rosa, R., Palomba, C., Leaci, P., Piccinni, O. J., Sequino, V., Errico, L., Trozzo, L., Palfreyman, J., McKee, J. W., Meyers, B. W., Stairs, I., Guillemot, L., Cognard, I., Theureau, G., Keith, M. J., Lyne, A., Flynn, C., & Stappers, B. (2023). Search for gravitational wave signals from known pulsars in LIGO-Virgo O3 data using the 5n -vector ensemble method. Physical Review D, 108(12), Article 122002. https://doi.org/10.1103/PhysRevD.108.122002

• Journal Article Type: Article
• Acceptance Date: Nov 13, 2023
• Online Publication Date: Dec 4, 2023
• Publication Date: Dec 15, 2023
• Deposit Date: Dec 8, 2023
• Publicly Available Date: Feb 23, 2024
• Journal: Physical Review D
• Print ISSN: 2470-0010
• Electronic ISSN: 2470-0029
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 108
• Issue: 12
• Article Number: 122002
• DOI: https://doi.org/10.1103/PhysRevD.108.122002
• Public URL: https://hull-repository.worktribe.com/output/4470000