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We report the first detection of the Zeeman effect in the 36 GHz Class Imethanol maser line. The observations were carried out with 13 antennas of theEVLA toward the high mass star forming region M8E. Based on our adopted Zeemansplitting factor of $z = 1.7 Hz/mG, we detect a line of sight magnetic field of-31.3 +/- 3.5 mG and 20.2 +/- 3.5 mG to the northwest and southeast of themaser line peak respectively. This change in sign over a 1300 AU size scale mayindicate that the masers are tracing two regions with different fields, or thatthe same field curves across the regions where the masers are being excited.The detected fields are not significantly different from the magnetic fieldsdetected in the 6.7 GHz Class II methanol maser line, indicating that methanolmasers may trace the large scale magnetic field, or that the magnetic fieldremains unchanged during the early evolution of star forming regions. Givenwhat is known about the densities at which 36 GHz methanol masers are excited,we find that the magnetic field is dynamically significant in the star formingregion.

First Detection of the Zeeman Effect in the 36 GHz Class I methanol maser line with the EVLA