Masayuki, Yutaro, Kiwamu,

We have updated the frequency noise in the noise budget code. Now the code uses the latest estimate of the frequency noise at the output of the IMC. The estimate was one of those produced by Nakano-kun's IMC noise budget code. Anyhow, the laser frequency noise doesn't seem like a dominant noise source at the moment given that the contribution from the frequency noise is lower then the current noise floor at any frequencies by more than an order of magnitude.

The coupling right now assumes the Schnupp asymmetry as the dominant arm imbalance. Also, the second attachment shows a comparison of the old and new frequency noise estimation in which the noise floor at 100 Hz is mcuh higher than before.