Planck 2013 results
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Table 6

LFI beam FWHM and ellipticity measured in flight from four Jupiter passes.

Beam [arcmin] Ellipticityc

70 GHz mean 13.08 1.27
LFI-18 13.44±0.03 1.26±0.01
LFI-19 13.11±0.04 1.27±0.01
LFI-20 12.84±0.04 1.28±0.01
LFI-21 12.81±0.03 1.29±0.01
LFI-22 12.95±0.03 1.28±0.01
LFI-23 13.33±0.04 1.26±0.01
44 GHz mean 28.09 1.25
LFI-24 23.17±0.07 1.37±0.01
LFI-25 30.60±0.10 1.19±0.01
LFI-26 30.49±0.12 1.20±0.01
30 GHz mean 33.16 1.37
LFI-27 33.09±0.11 1.38±0.01
LFI-28 33.23±0.11 1.37±0.01

Notes. Uncertainties are the standard deviation of the mean of the 1σ statistical uncertainties of the fit. A small difference is expected between the M and S beams, caused by optics and receiver non-idealities.


The square root of the product of the major axis and minor axis FWHMs of the individual horn beams, averaged between M and S radiometers.


Ratio of the major and minor axes of the fitted elliptical Gaussian.

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