Projected density distribution of RRab stars in logarithmic scale together with the log-linear fits. The colour-coding is the same as in Fig. 1. The solid black line shows power-law fit for the innermost area of R < 2.2° with a slope of m_RRab[1] = −0.94 ± 0.051. The black semi-dashed line shows the best fit for 2.2° < R <  8.0° with a slope m_RRab[2] = −1.50 ± 0.019. The best fit for 8.0° < R < 30.0° corresponds to the black dotted line with slope m_RRab[3] = −2.43 ± 0.043.