Joint GEO600 Virgo run
In the summer of 2011, GEO joined the Virgo detector in a 3-month long joint run. At high frequencies (above about 2 kilo-Hertz), the GEO detector reached the same (or slightly better) sensitivity as the 5 times larger Virgo detector.
Science-quality data were acquired for 84.3% (78.8 days) of the total time, with squeezing applied for 53.1% (41.8 days) of the science time. The average squeezing level observed in this period was 16% (1.3 dB).