Probability of observing n = 0,1,2 observations during our observing season for the TeV source RGB J0136+391 (top) and the non-TeV source GB6 J1037+5711 (bottom). The color scale shows the probability for a various set of parameters n_var and N_cells. The white dot indicates the best-fit region for obtaining a similar polarization fraction as in the observed light curve and the black curves show its 95% confidence interval.