SIMBAD references

The presence of a strong source, such as the sun or Cassiopeia A, in the distant sidelobes of a radio telescope can limit the image quality achieved with these observations. Conventional methods of subtracting out the response of these sources have limited success. In part this is because the instrumental response a large distance from the pointing centre is generally poorly understood and time variable. In the case of the sun it is also because the sun's complex and variable nature. We present an approach, based on a continuum subtraction technique, which can substantially reduce the interference caused by such sources for spectral line experiments. We present an observation where the solar interference has been reduced by a substantial amount.