CO(1–0) spectra for the detected HCG galaxies. The detection window is shown with a red horizontal line. Main beam temperature (Tmb, in K) is displayed on the Y axis, and the velocity with respect to LSR in km s-1 on the X axis. Velocity resolution is smoothed to 21 or 27 km s-1. The optical velocity of the galaxy, converted to the radio definition, is marked with an arrow.
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