EE (top curve, diamond symbols) and BB (bottom curve, star symbols) power spectra of the simulated maps and their fits for the LR33 sky region. The diamonds and the stars represent the mean value computed over 1000 realizations. The 1σ error bars are derived from the sample standard deviation of the power in each ℓ bin. The blue dashed lines represent the fits to the mean spectra and the blue dotted lines the 1σ error on the fits. The red shade areas represent the power-law fit and the 1σ errors to the Planck data reported in PIPXXX for the LR33 region.