Null-stream veto for two co-located detectors: implementation issues

Ajith, P., Hewitson, M. and Heng, I.S. (2006) Null-stream veto for two co-located detectors: implementation issues. Classical and Quantum Gravity, 23(19), S741-S749. (doi: 10.1088/0264-9381/23/19/S13)

Abstract

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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Heng, Professor Ik Siong
• Authors: Ajith, P., Hewitson, M., and Heng, I.S.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Research Centre: College of Science and Engineering > School of Physics and Astronomy > Institute for Gravitational Research
• Journal Name: Classical and Quantum Gravity
• Publisher: Institute of Physics
• ISSN: 0264-9381
• ISSN (Online): 1361-6382