Variation in the broadband circular polarisation measurements observed in three filters B′V′R′ of the DiPol-UF instrument at the NOT (Berdyugin et al. 2022, 2023, 2024). In each panel, the three dotted lines represent the average of all data obtained in a particular filter: from top to bottom, the R‘ filter (red dotted line), the V‘ filter (green dotted line) and the B‘ filter (blue dotted line). These lines are separated by ∆V/I = 0.3 %. The x-axis represents the time of the observations in days from the first measurement. The solid circles represent the difference between each measurement and the average of all measurements in a given filter (red circles for filter R′ , green circles for filter V′, and blue circles for filter B′ .