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Journal Article

Long gravitational-wave transients and associated detection strategies for a network of terrestrial interferometers


Giampanis,  Stefanos
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Thrane, E., Kandhasamy, S., Ott, C. D., Anderson, W. G., Christensen, N. L., Coughlin, M. W., et al. (2011). Long gravitational-wave transients and associated detection strategies for a network of terrestrial interferometers. Physical Review D, 83(8): 083004. doi:10.1103/PhysRevD.83.083004.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-0885-2
Searches for gravitational waves (GWs) traditionally focus on persistent sources (e.g., pulsars or the stochastic background) or on transients sources (e.g., compact binary inspirals or core-collapse supernovae), which last for timescales of milliseconds to seconds. We explore the possibility of long GW transients with unknown waveforms lasting from many seconds to weeks. We propose a novel analysis technique to bridge the gap between short O(s) burst analyses and persistent stochastic analyses. Our technique utilizes frequency-time maps of GW strain cross-power between two spatially separated terrestrial GW detectors. The application of our cross-power statistic to searches for GW transients is framed as a pattern recognition problem, and we discuss several pattern-recognition techniques. We demonstrate these techniques by recovering simulated GW signals in simulated detector noise. We also recover environmental noise artifacts, thereby demonstrating a novel technique for the identification of such artifacts in GW interferometers. We compare the efficiency of this framework to other techniques such as matched filtering.