... galaxies

Based on observations with the 100-m telescope of the MPIfR (Max-Planck-Institut für Radioastronomie) at Effelsberg.

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... NGC 3690

According to NED, the entire merger forms NGC 3690, while IC 694 is a less prominent galaxy $\sim$1' to the northwest. The latter target was observed by Braatz et al. (2004) in the H₂O line. A 1$\sigma$ noise limit of 2.4 mJy per 0.3 km s^-1 channel was obtained. Here we follow the more traditional nomenclature that is commonly used in the literature.

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