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

Eric Thrane, Shivaraj Kandhasamy, Christian D. Ott, Warren G. Anderson, Nelson L. Christensen, Michael W. Coughlin, Steven Dorsher, Stefanos Giampanis, Vuk Mandic, Antonis Mytidis, Tanner Prestegard, Peter Raffai, and Bernard Whiting
Phys. Rev. D 83, 083004 – Published 11 April 2011

Abstract

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 time scales 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.

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  • Received 9 December 2010

DOI:https://doi.org/10.1103/PhysRevD.83.083004

© 2011 American Physical Society

Authors & Affiliations

Eric Thrane1,*, Shivaraj Kandhasamy1, Christian D. Ott2, Warren G. Anderson3, Nelson L. Christensen4, Michael W. Coughlin4, Steven Dorsher1, Stefanos Giampanis5,3, Vuk Mandic1, Antonis Mytidis6, Tanner Prestegard1, Peter Raffai7, and Bernard Whiting6

  • 1School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
  • 2TAPIR, Caltech, Pasadena, California 91125
  • 3University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53201
  • 4Physics and Astronomy, Carleton College, Northfield, Minnesota 55057
  • 5Albert-Einstein-Institut, Max-Planck-Institut für Gravitationsphysik, D-30167 Hannover, Germany
  • 6Department of Physics, University of Florida, Gainsville, Florida 32611, USA
  • 7Institute of Physics, Eötvös University, 1117 Budapest, Hungary

  • *ethrane@physics.umn.edu

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Issue

Vol. 83, Iss. 8 — 15 April 2011

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