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Description
We present an 86GHz SiO (v=1, J=2->1) maser search towards late-type stars located within |b|<0.5{deg} and 20{deg}<l<50{deg}. This search is an extension at longer longitudes of the work by Messineo et al. (2002, Cat. J/A+A/393/115). We selected 135 stars from the MSX catalog using color and flux criteria and detected 92 (86 new detections). The detection rate is 68%, the same as in our previous study. The last few decades have seen the publication of several catalogues of point sources detected in infrared surveys (MSX, 2MASS, DENIS, ISOGAL, WISE, GLIMPSE, AKARI, and MIPSGAL). We searched each catalogue for data on the 444 targets of our earlier survey and for the 135 in the survey reported here. We confirm that, as anticipated, most of our targets have colors typical of oxygen-rich AGB stars. Only one target star may have left the AGB already. Ten stars have colors typical of carbon-rich stars, meaning a contamination of our sample with carbon stars of <=1.7%.
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