Processing and calibration of the deepest low frequency images of the sky

The LOFAR Two-metre Sky Survey (LoTSS) Deep Fields have produced the deepest low-frequency radio astronomy images of the sky to date. In this poster, we show the processing methodology followed to produce these deep images focusing in the data calibration pipeline developed, the infrastructure used, and the challenges found. An initial data volume of ~2 PB was reduced to a snapshot of ~1.5 GB in which a sky density of radio objects of ~5000 sources per square degree is reached in the central 25 square degrees with a resolution of 6 arcseconds. The development of these new calibration methods and pipelines have been crucial in enabling the scientific exploitation of state-of-the-art radio infrastructures and will be relevant for future infrastructures like the Square Kilometre Array.

Theme – Data Processing Pipelines and Science-Ready Data