Cambridge University Press (CUP), Proceedings of the International Astronomical Union, S287(8), p. 85-92, 2012
DOI: 10.1017/s1743921312006709
Full text: Unavailable
AbstractClass II methanol masers are known to be tracers of an early phase of massive star formation. The 6.7- and 12.2-GHz methanol maser transitions can show a significant amount of variability, including periodic variations. Studying maser variability can lead to important insights into conditions in the maser environment but first the maser time-series need to be characterised. The results of long-term monitoring of 8 regularly-varying sources will be presented and methods of period-search discussed.