SIMBAD references

We used the IRAM Interferometer to map the J=1-0 and J=2-1 lines of C¹⁷O as well as the continuum at 112 and 225 GHz of the W3(OH) region. Towards the cluster of water masers W3(H₂O) we observed compact continuum emission at both frequencies with spectral index of 3.6 from hot dust emission. The C¹⁷O maps show more extended gas with the most massive molecular clump towards W3(H₂O) and none towards W3(OH) itself. We derive a peak column density of 5x10²³cm^–2 at the H₂O maser position. Dust and line fluxes are both consistent with a mass of 10M_☉. Peaks of molecular line channel maps of C¹⁷O, CH₃OH, and C₂H₅CN show an E-W orientation similar to the cluster of H₂O masers.