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Fig. 6


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The smoothed initial monthly number of PF after removal of the observations with Q < 3 (orange curve), the overall reduced number of PF following the correction for B0 (brown curve), and the final corrected PFcJJ (green curve) after an additional correction for the varying seeing (see Fig. 3). The correction for B0 results in an overall decrease of the PF numbers by 12–18%. The correction for seeing decreases the PF numbers prior to SC23, but mostly increases the PF numbers prior to SC24 and SC25.

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