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The 13CH4 absorption spectrum has been recorded at 296K and 80K in the Icosad range between 6600 and 7700cm−1. The achieved noise equivalent absorption of the spectra recorded by differential absorption spectroscopy (DAS) is about αmin≈1.5×10−7cm−1. Two empirical line lists were constructed including 17,792 and 24,139 lines at 80K and 296K, respectively. For comparison, the HITRAN database provides...