R. Abbott

Author ORCID Identifier

Shcheblanov, Nikita: 0000-0001-8696-2435
Canepa, Maurizio: 0000-0002-5148-1233
Christensen, Nelson: 0000-0002-6870-4202
Nelemans, Gijs: 0000-0002-0752-2974
Ando, Masaki: 0000-0002-8865-9998
Gerberding, Oliver: 0000-0001-7740-2698
Keitel, David: 0000-0002-2824-626X
Mow-Lowry, Conor M: 0000-0002-0351-4555
Mangano, Valentina: 0000-0001-7902-8505
Chiadini, Francesco: 0000-0002-9339-8622
Helmling-Cornell, Adrian: 0000-0002-7709-8638
Buscicchio, Riccardo: 0000-0002-7387-6754
Ferrante, Isidoro: 0000-0002-0083-7228
Mapelli, Michela: 0000-0001-8799-2548
Pascucci, Daniela: 0000-0003-1907-0175
Edy, Oliver: 0000-0001-9617-8724
Kapadia, Shasvath: 0000-0001-5318-1253
Huang, Yao-Chin: 0000-0001-8786-7026
Mozzon, Simone: 0000-0002-8855-2509
Cabourn Davies, Gareth: 0000-0002-4289-3439
Lundgren, Andrew: 0000-0002-0363-4469
Allocca, Annalisa: 0000-0002-5288-1351
Mitselmakher, Guenakh: 0000-0001-5745-3658
Prodi, Giovanni Andrea: 0000-0001-5256-915X
Garcia Nunez, Carlos: 0000-0001-5518-6189
Pilo, Federico: 0000-0003-4967-7090
Steer, Daniele: 0000-0002-8781-1273
Ganguly, Apratim: 0000-0001-7394-0755
Boschi, Valerio: 0000-0001-8665-2293
Errico, Luciano: 0000-0003-2112-0653
Gibson, Desmond: 0000-0003-2851-0072
Park, June Gyu: 0000-0002-7510-0079
Parisi, Alessandro: 0000-0003-0251-8914
Salemi, Francesco: 0000-0002-9511-3846
Hill, Paul: 0000-0003-4826-3531
Di Renzo, Francesco: 0000-0002-5447-3810
Macas, Ronaldas: 0000-0002-6096-8297
Utina, Andrei: 0000-0003-2975-9208
Marquina, Antonio: 0000-0001-8767-4208
Charlton, Philip: 0000-0002-4263-2706
Koekoek, Gideon: 0000-0002-7750-1925
Williamson, Andrew: 0000-0002-7627-8688
Ho, Wynn: 0000-0002-6089-6836
Setyawati, Yoshinta Eka: 0000-0003-3718-4491
Rettegno, Piero: 0000-0001-8088-3517
Nuttall, Laura Kate: 0000-0001-7472-0201
Guixe, Gerard: 0000-0002-8780-9827
Naticchioni, Luca: 0000-0003-2918-0730
Hollows, Ian: 0000-0002-3404-6459
Harry, Ian: 0000-0002-5304-9372
Razzano, Massimiliano: 0000-0003-4825-1629
Bejger, Michal: 0000-0002-4991-8213
De Pietri, Roberto: 0000-0003-1556-8304

Document Type


Publication Date



Results are presented of searches for continuous gravitational waves from 20 accreting millisecond x-ray pulsars with accurately measured spin frequencies and orbital parameters, using data from the third observing run of the Advanced LIGO and Advanced Virgo detectors. The search algorithm uses a hidden Markov model, where the transition probabilities allow the frequency to wander according to an unbiased random walk, while the J-statistic maximum-likelihood matched filter tracks the binary orbital phase. Three narrow subbands are searched for each target, centered on harmonics of the measured spin frequency. The search yields 16 candidates, consistent with a false alarm probability of 30% per subband and target searched. These candidates, along with one candidate from an additional target-of-opportunity search done for SAX J1808.4 - 3658, which was in outburst during one month of the observing run, cannot be confidently associated with a known noise source. Additional follow-up does not provide convincing evidence that any are a true astrophysical signal. When all candidates are assumed nonastrophysical, upper limits are set on the maximum wave strain detectable at 95% confidence, h(0)(95%). The strictest constraint is h(0)(95%) = 4.7 x 10(-26) from IGR J17062 - 6143. Constraints on the detectable wave strain from each target lead to constraints on neutron star ellipticity and r-mode amplitude, the strictest of which are epsilon(95%) = 3.1 x 10(-7) and alpha(95%) = 1.8 x 10(-5) respectively. This analysis is the most comprehensive and sensitive search of continuous gravitational waves from accreting millisecond x-ray pulsars to date.

Publication Source (Journal or Book title)

Physical Review D