[Keiko, Takaaki, Stefan, Masayuki]

The ETMY started to be warmed up today. We did ring-down measurement again, and found that the finesse got increased even at 33 K. The estimated finesse is 120, corresponds to the mirror loss of 1.1 %. We did several measurement and all of the fittings shows consistent value.

The low finesse might be because of the contamination on the mirror...??