Investigating the noise residuals around the gravitational wave event GW150914

We use the Pearson cross-correlation statistic proposed by Liu and Jackson [1], and employed by Creswell et al. [2], to look for statistically significant correlations between the LIGO Hanford and Livingston detectors at the time of the binary black hole merger GW150914. We compute this statistic fo...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2019-02, Vol.2019 (2), p.19-19
Main Authors: Nielsen, Alex B., Nitz, Alexander H., Capano, Collin D., Brown, Duncan A.
Format: Article
Language:English
Subjects:
Computer simulation
Cross correlation
Detectors
Gravitational waves
Gravity waves
Noise
Random noise
Relativity
Sensors
Statistical significance
Subtraction
Waveforms
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Summary:We use the Pearson cross-correlation statistic proposed by Liu and Jackson [1], and employed by Creswell et al. [2], to look for statistically significant correlations between the LIGO Hanford and Livingston detectors at the time of the binary black hole merger GW150914. We compute this statistic for the calibrated strain data released by LIGO, using both the residuals provided by LIGO and using our own subtraction of a maximum-likelihood waveform that is constructed to model binary black hole mergers in general relativity. To assign a significance to the values obtained, we calculate the cross-correlation of both simulated Gaussian noise and data from the LIGO detectors at times during which no detection of gravitational waves has been claimed. We find that after subtracting the maximum likelihood waveform there are no statistically significant correlations between the residuals of the two detectors at the time of GW150914.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2019/02/019