Proc. IAU volume 13, issue S336, P105-108 2017 DOI: 10.1017/s1743921317010687 View full text
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Tiege P. McCarthy, Simon P. Ellingsen, Xi Chen, Shari L. Breen, Maxim A. Voronkov, Hai-hua Qiao

Abstract: AbstractWe have detected maser emission from the 36.2 GHz (4−1 → 30E) methanol transition towards NGC 4945. This emission has been observed in two separate epochs and is approximately five orders of magnitude more luminous than typical emission from this transition within our Galaxy. NGC 4945 is only the fourth extragalactic source observed hosting class I methanol maser emission. Extragalactic class I methanol masers do not appear to be simply highly-luminous variants of their galactic counterparts and instea…

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