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Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM
Abstract:
This paper presents an analysis of the transient behavior of the Advanced
LIGO suspensions used to seismically isolate the optics. We have characterized
the transients in the longitudinal motion of the quadruple suspensions during
Advanced LIGO's first observing run. Propagation of transients between stages
is consistent with modelled transfer functions, such that transient motion
originating at the top of the suspension chain is significantly reduced in
amplitude at the test mass. We find that there are transients seen by the
longitudinal motion monitors of quadruple suspensions, but they are not
significantly correlated with transient motion above the noise floor in the
gravitational wave strain data, and therefore do not present a dominant source
of background noise in the searches for transient gravitational wave signals.