Planck 2018 results
Open Access

Table 2.

Unit conversion factors and colour corrections.

Experiments.................. WMAP LFI WMAP LFI LFI HFI HFI HFI HFI
Reference frequencies (GHz)...... 23 28.4 33 44.1 70.4 100 143 217 353
U........................... 0.986 0.949 0.972 0.932 0.848 0.794 0.592 0.334 0.075
C........................... 1.073 1.000 1.027 1.000 0.981 1.088 1.017 1.120 1.098

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