Searches for long-duration gravitational wave transients in LIGO and Virgo data

A. Macquet, M. A. Bizouard, N. Christensen, M. Coughlin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Long-lived, gravitational-wave (GW) transients have received interest in the last decade as the sensitivity of LIGO and Virgo has increased. Such signals, lasting between ∼ 101 − 103s, can be emitted by a variety of sources, including accretion disk instabilities around black holes, binary neutron stars post-merger, core-collapse supernovae, non-axisymmetric deformations in isolated neutron stars, and magnetar giant flares. Given the large parameter space and the lack of precisely modeled waveforms, searches must rely on robust detection algorithms, which make few or no assumptions on the nature of the signal. Here, we present a new data analysis pipeline to search for long-lived, transient GW signals, based on an excess cross-power statistic computed over a network of detectors. It uses a hierarchical strategy that allows to estimate the background quickly and implements several features to increase detection sensitivity by ∼ 30% for a wide range of signal morphologies compared to a previous implementation. We also report upper limits on the emitted GW energy from a search conducted with the pipeline in LIGO data for GW emission around a sample of nearby magnetar giant flares, and discuss detection potential of such sources with second and third generation detectors.

Original languageEnglish (US)
Title of host publicationProceedings of the 55th Rencontres de Moriond - 2021 Gravitation
EditorsEtienne Auge, Jacques Dumarchez, Jean Tran Thanh Van
PublisherARISF
Pages239-242
Number of pages4
ISBN (Electronic)9791096879144
StatePublished - 2021
Event55th Rencontres de Moriond on Gravitation 2021 - Virtual, Online
Duration: May 9 2021May 11 2021

Publication series

NameProceedings of the 55th Rencontres de Moriond - 2021 Gravitation

Conference

Conference55th Rencontres de Moriond on Gravitation 2021
CityVirtual, Online
Period5/9/215/11/21

Bibliographical note

Publisher Copyright:
© 2021 Rencontres de Moriond - 2021 Gravitation

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