Radial profiles of HD 181327 at 70 μm (top), compared to HD 148387 as a PSF reference, and at 100 μm (bottom), compared to α Boo as a PSF reference. Both plots show the azimuthally averaged, normalized radial brightness profile vs. radius from the star. Each error bar is the standard deviation of the brightness values at that radius. The FWHM values for the profiles are given on the plot.
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