Gravitational-wave astronomy is established with direct observation of gravitational wave from merging binary black holes and binary neutron stars during the first and second observing run of LIGO and Virgo detectors. The gravitational-wave transient searches mainly separate into two families: modeled and modeled-independent searches. The modeled searches are based on matched filtering techniques, and model-independent searches are based on the extraction of excess power from time-frequency representations. We have proposed a hybrid method, called wavegraph that mixes the two approaches. It uses astrophysical information at the extraction stage of model-independent search using a mathematical graph. In this work, we assess the performance of wavegraph clustering in real LIGO and Virgo noise (the sixth science run and the first observing run) and using the coherent WaveBurst transient search as a backbone. Further, we propose a new signal consistency test for this algorithm. This test uses the amplitude profile information to distinguish between the gravitational-wave transients from the noisy glitches. This test is able to remove a large fraction of loud glitches, which thus results in additional overall sensitivity in the context of searches for binary black-hole mergers in the low-mass range.
Astrophysical signal consistency test adapted for gravitational-wave transient searches / Gayathri, V.; Bacon, P.; Pai, A.; Chassande-Mottin, E.; Salemi, F.; Vedovato, G.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 100:12(2019). [10.1103/PhysRevD.100.124022]
Astrophysical signal consistency test adapted for gravitational-wave transient searches
Salemi F.;
2019-01-01
Abstract
Gravitational-wave astronomy is established with direct observation of gravitational wave from merging binary black holes and binary neutron stars during the first and second observing run of LIGO and Virgo detectors. The gravitational-wave transient searches mainly separate into two families: modeled and modeled-independent searches. The modeled searches are based on matched filtering techniques, and model-independent searches are based on the extraction of excess power from time-frequency representations. We have proposed a hybrid method, called wavegraph that mixes the two approaches. It uses astrophysical information at the extraction stage of model-independent search using a mathematical graph. In this work, we assess the performance of wavegraph clustering in real LIGO and Virgo noise (the sixth science run and the first observing run) and using the coherent WaveBurst transient search as a backbone. Further, we propose a new signal consistency test for this algorithm. This test uses the amplitude profile information to distinguish between the gravitational-wave transients from the noisy glitches. This test is able to remove a large fraction of loud glitches, which thus results in additional overall sensitivity in the context of searches for binary black-hole mergers in the low-mass range.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione