Journal article
Cross-correlation search for continuous gravitational waves from a compact object in SNR 1987A in LIGO Science run 5
L Sun, A Melatos, PD Lasky, CTY Chung, NS Darman
Physical Review D | AMER PHYSICAL SOC | Published : 2016
Abstract
We present the results of a cross-correlation search for gravitational waves from SNR 1987A using the second year of LIGO science run 5 data. The frequency band 75-450 Hz is searched. No evidence of gravitational waves is found. A 90% confidence upper limit of h0≤3.8×10-25 is placed on the gravitational-wave strain at the most sensitive frequency near 150 Hz. This corresponds to an ellipticity of ϵ≤8.2×10-4 and improves on previously published strain upper limits by a factor of approximately 4. We perform a comprehensive suite of validations of the search algorithm and identify several computational savings that marginally sacrifice sensitivity in order to streamline the parameter space bein..
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Grants
Awarded by Australian Government
Funding Acknowledgements
We are grateful to Keith Riles, John Whelan, Badri Krishnan, Karl Wette, Benjamin Owen, and the LIGO Scientific Collaboration Continuous Wave Working Group for informative discussions. We are also grateful to Eric Thrane, Alberto Vecchio, and Teviet Creighton for their comprehensive formal review of the computer code and validation results of the SN1987A cross-correlation pipeline. L. S. is supported by an Australian Postgraduate Award. The research was supported by Australian Research Council (ARC) Discovery Project No. DP110103347. P. D. L. is also supported by ARC DP140102578. Computations were done on the ATLAS Hannover cluster operated by the Albert Einstein Institute in support of research conducted by the LIGO and Virgo Scientific Collaborations, and the Pawsey Supercomputing Centre supported by the Australian Government and the Government of Western Australia.