Time-series data from multiple gravitational wave (GW) detectors can be linearly combined to form a null-stream, in which all GW information will be cancelled out. This null-stream can be used to distinguish between actual GW triggers and spurious noise transients in a search for GW bursts using a network of detectors. The biggest source of error in the null-stream analysis comes from the fact that the detector data are not perfectly calibrated. In this paper, we present an implementation of the null-stream veto in the simplest network of two co-located detectors. The detectors are assumed to have calibration uncertainties and correlated noise components. We estimate the effect of calibration uncertainties in the null-stream veto analysis and propose a new formulation to overcome this. This new formulation is demonstrated by doing software injections in Gaussian noise.
Cite
@article{arxiv.gr-qc/0604004,
title = {Null-stream veto for two co-located detectors: Implementation issues},
author = {P Ajith and M Hewitson and I S Heng},
journal= {arXiv preprint arXiv:gr-qc/0604004},
year = {2009}
}
Comments
Minor changes; To appear in Class. Quantum Grav. (Proc. GWDAW10)