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We reassess the evidence that WMAP temperature maps contain a statisticallysignificant "cold spot" by repeating the analysis using simple circular top-hat(disk) weights, as well as Gaussian weights of varying width. Contrary toprevious results that used Spherical Mexican Hat Wavelets, we find nosignificant signal at any scale when we compare the coldest spot from our skyto ones from simulated Gaussian random, isotropic maps. We trace this apparentdiscrepancy to the fact that WMAP cold spot's temperature profile just happensto favor the particular profile given by the wavelet. Since randomly generatedmaps typically do not exhibit this coincidence, we conclude that the originalcold spot significance originated at least partly due to a fortuitous choice ofusing a particular basis of weight functions. We also examine significance of amore general measure that returns the most significant result among severalchoices of the weighting function, angular scale of the spot, and thestatistics applied, and again find a null result.

Disks in the sky: A reassessment of the WMAP "cold spot"