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GR: Fachverband Gravitation und Relativitätstheorie

GR 5: Gravitational Waves

GR 5.2: Vortrag

Dienstag, 22. März 2022, 16:35–16:55, GR-H2

Detecting long-duration gravitational wave signals — •Liudmila Fesik and Maria Alessandra Papa — Max Planck Institute for Gravitational Physics (Albert Einstein Institute) and Leibniz University, Callinstraße 38, 30167 Hannover, Germany

Spinning neutron stars are sources of long-duration continuous waves (CWs) that may be detected by interferometric detectors. We focus on glitching pulsars with abrupt spin-ups and long term spin-down, which imprint in CWs as transient signals from weeks to months. Standart method for identifying transient signals is the match-filtering, which combines a coherent detection statistics over time intervals of different duration. We propose a new method, where the most information from an initial search is considered in order to set up the post-following transient searches. We characterize the method by determining the false alarm and false dismissal probabilities for different signal strengths, and appropriate choices of the relative detection thresholds. We compare the sensitivity of this method with the standart match-filtering.