Fig. 15.

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Sensitivity of each individual pointing that makes up LoTSS-DR2 as a function of the mean elevation during the observation. The sensitivities are scaled to their equivalent for an 8 h run by taking into account the exact integration time and the fraction of data that are flagged. The blue points and blue histograms with \ hatchings show pointings in the RA-13 region and the red points and red histograms with / hatchings show the pointings in the lower average declination RA-1 region. The yellow histograms correspond to all pointings in both regions. The black line shows the best fit A×cos(90-elevation)−2.0 curve where A is found to be 62 μJy beam−1 and the dependence on elevation is fixed according to the projected size of the LOFAR stations.
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