Observations of Stellar Maser Sources with No IRAS Counterpart

We investigated stellar maser sources with no IRAS counterpart at the radio,middle-infrared, and near-infrared wavelengths. A 43 GHz SiO maser search for120 2MASS/MSX objects, and 10 OH 1612 MHz sources with no or a very faint MSXcounterpart, resulted in 43 SiO detections: one OH 1612 MHz source, 2near-infrared stars, and 40 MSX sources. Additional near-infrared J-, H-, andK-band observations of the OH 1612 MHz sources detected 5 near-infraredcounterparts. Furthermore, middle-infrared imaging observations at 8.8, 9.7,12.4, and 24.5 micron with the Subaru 8.2-m telescope found counterparts for 2near-infrared stars with SiO masers, and counterparts for 6 OH 1612 MHzsources. However, 4 OH 1612 MHz sources were not detected in the sensitivenear- and middle-infrared searches; three of these are relatively strong OHmaser sources for which the positions were known accurately. We conclude thatone of these (OH 028.286-01.801) must be a young object in a star-formingregion.Comment: PASJ 57, No.6 issue in press (1 color figure), full high res. figures available at ftp://ftp.nro.nao.ac.jp/nroreport/no629.pdf.gz. PASJ 57 No. 6 (Dec 25, 2005 issue) in pres