First results of the low frequency facility experiment

The first low frequency facility (LFF) data are presented; the main purpose of the LFF is to study the pendulum thermal noise around 10 Hz. The displacement noise floor is at the level of 10(-13) m/Hz^(-1/2) at 10 Hz, and at about 11 Hz enters the 10(-14) In Hz(-1/2) sensitivity region; this level is compatible with the electronic noise of the drivers of the actuators used to lock the apparatus. The calibration method and the seismic noise contribution are discussed.