Development of a widefield mosaic imaging pipeline for e-MERLIN

Widefield imaging with a heterogeneous array, such as e-MERLIN, comprised of antennas with different primary beam sizes is problematic for sources on the edge of the beam. Furthermore, in mosaiced observations with contributions from overlapping fields is an extra complication, especially in the case of a weak lensing survey such as SuperCLASS which is reliant of shape measurement. The use of an A-term correction at the point of gridding visibilities can include the primary beam correction, but can be slow and memory intensive. We investigate using a modified version of WSCLEAN to carry this out.

Theme – Data Processing Pipelines and Science-Ready Data