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Published February 15, 2019 | Submitted + Published
Journal Article Open

Improving astrophysical parameter estimation via offline noise subtraction for Advanced LIGO


The Advanced LIGO detectors have recently completed their second observation run successfully. The run lasted for approximately 10 months and led to multiple new discoveries. The sensitivity to gravitational waves was partially limited by laser noise. Here, we utilize auxiliary sensors that witness these correlated noise sources, and use them for noise subtraction in the time domain data. This noise and line removal is particularly significant for the LIGO Hanford Observatory, where the improvement in sensitivity is greater than 20%. Consequently, we were also able to improve the astrophysical estimation for the location, masses, spins, and orbital parameters of the gravitational wave progenitors.

Additional Information

© 2019 American Physical Society. Received 11 July 2018; published 20 February 2019. The authors would like to thank the LIGO Scientific Collaboration's astrophysical parameter estimation group for their support. S. V. would like to thank R. Essick for providing the code to plot the sky location of sources. We are also very grateful for the computing support provided by The MathWorks, Inc. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation and operates under Cooperative Agreement No. PHY-0757058. This article has been given LIGO Document No. P1700260.

Attached Files

Published - PhysRevD.99.042001.pdf

Submitted - 1806.00532.pdf


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August 19, 2023
October 20, 2023