Treatment of calibration uncertainty in multi-baseline cross-correlation searches for gravitational waves

Uncertainty in the calibration of gravitational wave (GW) detector data leads to systematic errors, which must be accounted for in setting limits on the strength of GW signals. When cross-correlation measurements are made using data from a pair of instruments, as in searches for a stochastic GW back...

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Bibliographic Details
Published in:Journal of physics. Conference series 2014-03, Vol.484 (1), p.12027-4
Main Authors: Whelan, J T, Robinson, E L, Romano, J D, Thrane, E H
Format: Article
Language:English
Subjects:
Calibration
Correlation
Cross correlation
Detectors
Gravitational waves
Networks
Observatories
Physics
Searching
Stochasticity
Systematic errors
Uncertainty
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Summary:Uncertainty in the calibration of gravitational wave (GW) detector data leads to systematic errors, which must be accounted for in setting limits on the strength of GW signals. When cross-correlation measurements are made using data from a pair of instruments, as in searches for a stochastic GW background, the calibration uncertainties of the individual instruments can be combined into an uncertainty associated with the pair. With the advent of multi-baseline GW observation (e.g., networks consisting of multiple detectors such as the LIGO observatories and Virgo), a more sophisticated treatment is called for. We have described how the correlations between calibration factors associated with different pairs can be taken into account by marginalizing over the uncertainty associated with each instrument.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/484/1/012027