G-band light curves of the 47 RR Lyrae stars listed in Table A.3, all of which belong to UMi. The magenta filled circles are used to display the light curves folded according to the periods provided in the Gaia DR3 vari_rrlyrae table; the magenta open circles are used instead for the light curves of the sources whose periods were re-determined from our analysis of the time series data. V155 and V156 are located beyond 12 r_h; their light curves are displayed with yellow filled and yellow open circles, respectively.