GAL 350.504+00.956 , the SIMBAD biblio

A southern hemisphere survey of methanol emission sources in two millimetre-wave transitions has been carried out using the ATNF Mopra millimetre telescope. 16 emission sources have been detected in the 3₁-4₀A⁺ transition of methanol at 107GHz, including six new sources exhibiting class II methanol maser emission features. Combining these results with the similar northern hemisphere survey, a total of eleven 107-GHz methanol masers have been detected. A survey of the methanol emission in the 0₀-1_–1 E transition at 108GHz has resulted in the detection of 16 sources; one of them showing maser characteristics. This is the first methanol maser detected at 108GHz, presumably of class II. The results of large velocity gradient statistical equilibrium calculations confirm the classification of these new sources as class II methanol masers.