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 language | English (US) |
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Title of host publication | Proceedings of the 55th Rencontres de Moriond - 2021 Gravitation |
Editors | Etienne Auge, Jacques Dumarchez, Jean Tran Thanh Van |
Publisher | ARISF |
Pages | 239-242 |
Number of pages | 4 |
ISBN (Electronic) | 9791096879144 |
State | Published - 2021 |
Event | 55th Rencontres de Moriond on Gravitation 2021 - Virtual, Online Duration: May 9 2021 → May 11 2021 |
Publication series
Name | Proceedings of the 55th Rencontres de Moriond - 2021 Gravitation |
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Conference
Conference | 55th Rencontres de Moriond on Gravitation 2021 |
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City | Virtual, Online |
Period | 5/9/21 → 5/11/21 |
Bibliographical note
Publisher Copyright:© 2021 Rencontres de Moriond - 2021 Gravitation