The HFI focal plane on the sky. Individual detector locations are as measured, and beam shapes are represented by ellipses at the FWHM level. For polarized detectors, the beam shapes are over-plotted in red and blue and labelled (a/b) but are in practice indistinguishable by eye. Fits are on destriped data (except for 143-8) and represent the values from the Gaussian-only fits to the data.
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