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Planck 2013 results
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Table 5

Detection significance of the bispectra at each frequency.

Band Mean S/N per configuration Total S/N

217 GHz 1.24 5.83
353 GHz 2.85 19.27
545 GHz 4.59 28.72

Notes. The mean S/N per configuration and the total S/N are not directly linked by the square root of the configuration numbers, because the covariance matrix is not diagonal.