M87: the posterior mean image by Bayesian self-calibration (top) and the self-calibrated CLEAN image (bottom) reconstructed from the same a-priori calibrated visibility data of VLBA observations at 43 GHz. In the figure, intensities higher than 3σ_rms (root mean square) of corresponding reconstruction were shown. The image obtained by resolve has I_max = 35 Jy mas⁻2 with the noise level of σ_rms = 2 mJy mas⁻² which is calculated from the top left empty region in the posterior mean image. The CLEAN image restoring beam shown in the lower-left corner is 0.5×0.2 mas, Position angle (P.A.) = −11°. The CLEAN image has I_max = 6 Jy mas⁻² with the noise level of σ_rms = 0.6 mJy mas⁻².