  The Red MSX Source (RMS) survey is a multi-wavelength programme of follow-up
observations designed to distinguish between genuine massive young stellar
objects (MYSOs) and other embedded or dusty objects, such as ultra compact (UC)
HII regions, evolved stars and planetary nebulae (PNe), from a sample of ~2000
MYSOs candidates. These were identified by comparing the colours of objects
from the MSX and 2MASS point source catalogues to those of known MYSOs, in
order to develop colour selection criteria which have been used to produced the
RMS sample of MYSOs candidates. Our ultimate aim is to produce a large unbiased
sample of MYSOs (~500) with complementary multi-wavelength data with which to
study their properties. Here we report the results of 826 radio continuum and
346 mid-IR imaging observations carried out using the Australia Telescope
Compact Array and TIMMI2 on the ESO 3.6 m telescope respectively. These
observations are aimed at identifying and removing contaminating sources.
