Polarization intensity a); degree b) and angle c) maps of Orion Molecular Cloud (OMC-1) at 260 GHz (left) and 150 GHz (right) with intensity contours over-plotted. Only the regions with P > 2σ_P are plotted on b) and c). At both frequencies, for display purposes, the polarization intensity maps are smoothed with a Gaussian filter of 6 arcsec; while the polarization degree and angle maps are smoothed to 2 arcsec.