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. Author manuscript; available in PMC: 2020 Sep 8.
Published in final edited form as: Class Quantum Gravity. 2016 Jun 6;33(13):134001. doi: 10.1088/0264-9381/33/13/134001

Figure 1:

Figure 1:

The average measured strain-equivalent noise, or sensitivity, of the Advanced LIGO detectors during the time analyzed to determine the significance of GW150914 (Sept 12 - Oct 20, 2015). LIGO-Hanford (H1) is shown in red, LIGO-Livingston (L1) in blue. The solid traces represent the median sensitivity and the shaded regions indicate the 5th and 95th percentile over the analysis period. The narrowband features in the spectra are due to known mechanical resonances, mains power harmonics, and injected signals used for calibration [4, 5, 6].