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| - On the bispectrum of COBE and WMAP
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| - Abstract. The COBE-DMR 4-yr maps displayed a strong non-Gaussian signal in the ‘interscale’ components of the bispectrum: their observed values did not display the scatter expected from Gaussian maps. We re-examine this and other suggested non-Gaussian features in the light of WMAP. We find that they all disappear. Given that it was proved that COBE-DMR high noise levels and documented systematics could at most dilute the observed non-Gaussian features, we conclude that this data set must have contained non-negligible undocumented systematic errors. It turns out that the culprit is a combination of QuadCube pixelization and data collected during the ‘eclipse season’.
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