3 Results

The survey yielded 70 new sources of 6.7 GHz methanol masers. A total of 182 sources were detected above the sensitivity limit of 1.7 Jy. Because some sources were reobserved, a few detections were made below this 3$\sigma$ upper limit. The observed properties of the methanol sources are listed in Table 1. The IRAS name, the velocity interval of the maser emission $\Delta V$, the velocity of peak emission $V_{\rm p}$, the peak flux density $S_{\rm p}$, the integrated flux density $S_{\rm i}$, the epoch of observation and the discovery reference are given. Spectra of all the detected sources are shown in Fig. 1, where we also included already known sources, since most of them were previously observed with sensitivities and spectral resolutions lower than in our survey.

IRAS objects not detected to a 3$\sigma$ limit are listed in Table 2. For each object the IRAS name, the rms level and the epoch of observation are given. In several cases we found emission that was identified as a contamination or a sidelobe response from nearby methanol sources; their names are listed in the last column of Table 2.