Limits of Gaussian fluctuations in the cosmic microwave background at 19.2 GHz

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Abstract

The northern hemisphere data from the 19.2 GHz full sky survey are analyzed to place limits on the magnitude of Gaussian fluctuations in the cosmic microwave background implied by a variety of correlation functions. Included among the models tested are the monochromatic and Gaussian shaped families, and those with power-law spectra for -2<=n<=1. We place an upper bound on the quadrupole anisotropy of {DELTA}T/T < 3.2 x 10^-5^ rms, and an upper bound on scale-invariant (n = 1) fluctuations of a_2_ <4.5 x 10^-5^ (95% confidence level). There is significant contamination of these data from Galactic emission, and improvement of our modeling of the Galaxy could yield a significant reduction of these upper bounds.

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