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Using the 3.6/4.5/5.8/8.0 micron images with 1.2 arcsec pixel resolution fromthe Spitzer/GLIMPSE survey, we investigated 23 masing and 18 very red objectsthat were not identified in the 2MASS survey. Counterparts for all selectedobjects were found in the GLIMPSE images. Color indices in these IR bandssuggest the presence of a high-extinction layer of more than a few tenths of asolar mass in front of the central star. Furthermore, radio observations in theSiO and H2O maser lines found characteristic maser-line spectra of the embeddedobjects, e.g., the SiO J=1-0 line intensity in the v=2 state stronger than thatof the v=1 state, or very widespread H2O maser emission spectra. This indicatesthat these objects are actually enshrouded by very thick circumstellar matter,some of which cannot be ascribed to the AGB wind of the central star.Individually interesting objects are discussed, including two newly found waterfountains and an SiO source with nebulosity.

Identification of Very Red Counterparts of SiO Maser and OH/IR Objects in the GLIMPSE Survey