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We have used the Australia Telescope Compact Array (ATCA) to conduct furtherobservations of the 36.2-GHz ($4_{-1}\rightarrow3_0$E) methanol transitiontowards the nearby active galaxy NGC 4945. These observations have led to amore accurate determination of the offset between the maser emission and thenucleus of NGC 4945 with a typical synthesised beam of $6^{\prime\prime} \times4^{\prime\prime}$ ($108\times72$ pc). This corresponds to a factor of 4improvement with respect to the major-axis of the beam. Other transitions ofmethanol and lines of other molecular species were obtained alongside the36.2-GHz methanol emission, with strong detections of HC$_3$N (J = $4\rightarrow 3$) and CS (J = $1 \rightarrow0$) presented here. We do not detectthermal methanol (5$\sigma$ upper limit of 5 mJy in a 6 km s$^{-1}$ channel)from the 48.4-GHz ($1_{0}\rightarrow0_0$A$^+$) ground-state transition, noremission from the 44.1-GHz ($7_{0} \rightarrow 6_1 $A$^+$) class~I masertransition (5$\sigma$ upper limit of 6 mJy in a 3 km s$^{-1}$ channel). We alsopresent a comparison of the class~I maser emission observed towards NGC 4945with that from NGC 253 and towards the Galactic giant molecular cloud G1.6-0.025.

Investigations of the Class I methanol masers in NGC 4945