Fig. 5.
LoTSS-DR1 HETDEX spring field masks: “mask p” rejects all cells shown in dark blue and includes 53 pointings modelled by discs of radius 1.7 deg. Our default “mask d” additionally rejects cells with less than five sources (yellow cells), see also text in Sect. 3.4. For analysis that includes redshift information “mask z” additionally rejects a strip shown in light blue. For further details, see the text in Sect. 5.3.
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