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Published online by Cambridge University Press: 14 August 2015
Monitor observations of the SiO v=1, J=2−1 transition were made toward the Kleinman-Low infrared nebula. Observations were made from September 1976 to February 1980 with the 6 m mm-wave telescope of the Tokyo Astronomical Observatory. Data were taken with an acousto-optical spectrometer with a frequency resolution of about 50 kHz(Δv=0.17 km s−1).