Question: What is the difference between clean on image domain and clean on visibility domain? I heard that it is something about the pixel effects? However, I cannot understand that deeply. Could you help me to explain it, please? — Shui
Answer: A good general description of how the various variants of the CLEAN algorithm work can be found on the Institute for Millimeter Astronomy’s (IRAM) analysis software page. CLEAN works both in the visibility and image domain by iteratively convolving the visibilities with the instrumental resolution and comparing the result to the measured image.