BIMA ARRAY OBSERVATIONS OF THE 107 GHZ METHANOL MASERS IN CEPHEUS-A

BIMA Array observations of the 107 GHz CH3OH masers in the Cep A star- forming region have been carried out with 2'' resolution. These are th e first interferometric observations of 107 GHz CH3OH masers. Two mase rs were observed. They are both projected near (200 and 500 AU) an ult racompact H II region/radio jet, cofirming that they art: class II mas ers. While the 107 GHz masers are positionally coincident with the 12. 2 GHz CH,OH masers to within the uncertainties, these two maser groups (both of which belong to class II) are at different velocities, indic ating that they are not cospatial. This suggests that the pumping requ irements of 12.2 and 107 GHz masers are slightly different, and theref ore suggests that these masers reside in regions with slightly differe nt physical characteristics.