Robust vetoes for gravitational-wave burst triggers using known instrumental couplings

Abstract

The search for signatures of transient, unmodelled gravitational-wave (GW) bursts in the data of ground-based interferometric detectors typically uses `excess-power' search methods. One of the most challenging problems in the burst-data-analysis is to distinguish between actual GW bursts and spurious noise transients that trigger the detection algorithms. In this paper, we present a unique and robust strategy to `veto' the instrumental glitches. This method makes use of the phenomenological understanding of the coupling of different detector sub-systems to the main detector output. The main idea behind this method is that the noise at the detector output (channel H) can be projected into two orthogonal directions in the Fourier space -- along, and orthogonal to, the direction in which the noise in an instrumental channel X would couple into H. If a noise transient in the detector output originates from channel X, it leaves the statistics of the noise-component of H orthogonal to X unchanged, which can be verified by a statistical hypothesis testing. This strategy is demonstrated by doing software injections in simulated Gaussian noise. We also formulate a less-rigorous, but computationally inexpensive alternative to the above method. Here, the parameters of the triggers in channel X are compared to the parameters of the triggers in channel H to see whether a trigger in channel H can be `explained' by a trigger in channel X and the measured transfer function.

arXiv comment14 Pages, 8 Figures, To appear in Class. Quantum Grav

References in corpus (9)

• Accurate Evolutions of Orbiting Black-Hole Binaries Without Excision
• Gravitational wave extraction from an inspiraling configuration of merging black holes
• An excess power statistic for detection of burst sources of gravitational radiation
• A New Mechanism for Gravitational Wave Emission in Core-Collapse Supernovae
• General Relativistic Binary Merger Simulations and Short Gamma Ray Bursts
• Time-frequency detection algorithm for gravitational wave bursts
• Accurate Evolution of Orbiting Binary Black Holes
• Gravitational-Wave Emission from Rotating Gravitational Collapse in three Dimensions
• Gravitational wave burst vetoes in the LIGO S2 and S3 data analyses

Cited by in corpus (5)

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• Optimizing Vetoes for Gravitational-wave Transient Searches
• Instrumental vetoes for transient gravitational-wave triggers using noise-coupling models: The bilinear-coupling veto
• Identification of noise artifacts in searches for long-duration gravitational-wave transients
• Physical instrumental vetoes for gravitational-wave burst triggers