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We report the results of a systematic survey for 95 GHz class I methanolmasers towards a new sample of 192 massive young stellar object (MYSO)candidates associated with ongoing outflows (known as extended green objects orEGOs) identified from the Spitzer GLIMPSE survey. The observations were madewith the Australia Telescope National Facility (ATNF) Mopra 22-m radiotelescope and resulted in the detection of 105 new 95 GHz class I methanolmasers. For 92 of the sources our observations provide the first identificationof a class I maser transition associated with these objects (i.e. they are newclass I methanol maser sources). Our survey proves that there is indeed a highdetection rate (55%) of class I methanol masers towards EGOs. Comparison of theGLIMPSE point sources associated with EGOs with and without class I methanolmaser detections shows they have similar mid-IR colors, with the majoritymeeting the color selection criteria -0.6<[5.8]-[8.0]<1.4 and0.5<[3.6]-[4.5]<4.0. Investigations of the IRAC and MIPS 24 um colors and theassociated millimeter dust clump properties (mass and density) of the EGOs forthe sub-samples based on which class of methanol masers they are associatedwith suggests that the stellar mass range associated with class I methanolmasers extends to lower masses than for class II methanol masers, oralternatively class I methanol masers may be associated with more than oneevolutionary phase during the formation of a high-mass star.

A 95 GHz Class I Methanol Maser Survey Toward GLIMPSE Extended Green Objects (EGOs)