Planck 2015 results
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Table 2

Main beam descriptive parameters of the scanning beams, with ±1σ uncertainties.

Beam FWHM Ellipticity ψell
(arcmin) (deg)

70 GHz
18M 13.40 ± 0.02 1.235 ± 0.004 85.74 ± 0.41
18S 13.46 ± 0.02 1.278 ± 0.004 86.41 ± 0.33
19M 13.14 ± 0.02 1.249 ± 0.003 78.82 ± 0.35
19S 13.09 ± 0.02 1.281 ± 0.002 79.15 ± 0.30
20M 12.83 ± 0.02 1.270 ± 0.003 71.59 ± 0.32
20S 12.83 ± 0.02 1.289 ± 0.004 72.69 ± 0.31
21M 12.75 ± 0.02 1.280 ± 0.003 107.99 ± 0.27
21S 12.86 ± 0.02 1.294 ± 0.003 106.96 ± 0.29
22M 12.92 ± 0.02 1.264 ± 0.003 101.87 ± 0.30
22S 12.99 ± 0.02 1.279 ± 0.003 101.61 ± 0.30
23M 13.32 ± 0.02 1.235 ± 0.004 93.53 ± 0.40
23S 13.33 ± 0.02 1.279 ± 0.004 93.49 ± 0.36

44 GHz
24M 23.18 ± 0.05 1.388 ± 0.005 89.82 ± 0.33
24S 23.03 ± 0.04 1.344 ± 0.003 89.97 ± 0.34
25M 30.02 ± 0.07 1.191 ± 0.005 115.95 ± 0.75
25S 30.79 ± 0.07 1.188 ± 0.005 117.70 ± 0.74
26M 30.13 ± 0.08 1.191 ± 0.006 61.89 ± 0.84
26S 30.52 ± 0.08 1.189 ± 0.006 61.53 ± 0.77

30 GHz
27M 32.96 ± 0.06 1.364 ± 0.005 101.20 ± 0.34
27S 33.16 ± 0.07 1.379 ± 0.005 101.29 ± 0.34
28M 33.17 ± 0.07 1.366 ± 0.006 78.17 ± 0.36
28S 33.12 ± 0.07 1.367 ± 0.005 78.47 ± 0.33

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