12.2-GHz methanol maser methanol multibeam follow-up catalogue - II. Longitude range 186°-330°
journal contribution
posted on 2023-05-17, 15:44authored byBreen, SL, Simon EllingsenSimon Ellingsen, Caswell, JL, Green, JA, Voronkov, MA, Fuller, GA, Quinn, LJ, Avison, A
We present the second portion of a catalogue of 12.2-GHz methanol masers detected towards 6.7-GHz methanol masers observed in the unbiased Methanol Multibeam (MMB) survey. Using the Parkes radio telescope we have targeted all 207 6.7-GHz methanol masers in the longitude range 186°-330° for 12.2-GHz counterparts. We report the detection of 83 12.2-GHz methanol masers, and one additional source which we suspect is thermal emission, equating to a detection rate of 40 per cent. Of the 83 maser detections, 39 are reported here for the first time. We discuss source properties, including variability and highlight a number of unusual sources. We present a list of 45 candidates that are likely to harbour methanol masers in the 107.0-GHz transition.