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Fig. 3

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HerPlaNS PACS/SPIRE broadband images of NGC 6781 at 70, 160, 250, 350, and 500 μm in a 300′′ × 300′′ field centered at the position of the central star, (α, δ) = (19:18:28.085, +06:32:19.29) (Kerber et al. 2003), along with an [N ii] image taken at the NOT (Phillips et al. 2011). The far-IR peak surface brightness is indicated at the bottom-left corner, while the one-σsky noise is shown at the bottom-right corner (in mJy arcsec-2) in each panel. At the top-right corner, the beam size for the band is indicated by a gray circle (5.̋6, 11.̋4, 18.̋2, 24.̋9, and 36.̋3, respectively). White contours represent 90, 70, 50, 30, 10, and 5% of the peak, respectively, and the black contour indicates 3σsky detection. The pixel scales are 1, 1, 2, 6, 9, and 14 arcsec pix-1, respectively from upper left to lower right. To convert from mJy arcsec-2 to MJy sr-1, multiply by 42.5.

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