Properties of the 71 RRab stars in our sample (red dots) vs. stars used for incidence rate calculation (see Figure 5). Top left: distribution of RRab stars in Galactic coordinates. Colors correspond to the V − I color of each RRab star. Top right: same as top left, but with the colors corresponding to the number of available I-band data points. Bottom left: I vs. V − I color-magnitude diagram of the RRab stars. The white arrow denotes the reddening vector for 1 magnitude of color excess for R_V = 3.1 (Cardelli et al. 1989). Bottom right: proper motion distribution of the sample. The dashed white ellipse denotes the two standard deviation distances from the sample median.