Assessing the impact of two independent direction-dependent calibration algorithms on the LOFAR 21 cm signal power spectrum - And applications to an observation of a field flanking the north celestial pole

Open Access

Fig. 4

Flanking field sky model from CLEAN components with the LOFAR beam applied clustered into 20 directions for the DD calibration. The different colours denote different solving directions. Each cluster has an angular radius of 1–2°.

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