1. Current Noise at LHO Worst wire loss inferred from in situ violin mode measurements:  = 5.6 10 -3

2. 2 Thermal Noise in Initial LIGO

3. 3 Sensitivity Effects of Suspension Thermal Noise Binary Neutron Star Binary Black Holes (10 M o ) Stochastic Crab Pulsar  SRD16 Mpc60 Mpc4.1 10 -6 1.8 10 -7  = 2.8 10 -3 Typical in situ 19 Mpc75 Mpc2.8 10 -6 1.6 10 -5  = 1.7 10 -4 Wire material limit 27 Mpc120 Mpc6.6 10 -7 6.8 10 -6 Thermoelastic limit 29 Mpc135 Mpc4.6 10 -7 5.7 10 -7 Single Interferometer Values