A Measurement of the Angular Power Spectrum of the Microwave Background Made from the High Chilean Andes

A. D. Miller; E. Torbet; H. T. Tran; J. Puchalla; L. Page; M. J. Devlin; M. R. Nolta; T. Herbig; W. B. Dorwart

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A Measurement of the Angular Power Spectrum of the Microwave Background Made from the High Chilean Andes

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arxiv astro-ph/9905100 v3 pith:XAEAMKTK submitted 1999-05-08 astro-ph

E. Torbet , M. J. Devlin , W. B. Dorwart , T. Herbig , A. D. Miller , M. R. Nolta , L. Page , J. Puchalla

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H. T. Tran

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abstract

We report on a measurement of the angular spectrum of the anisotropy of the microwave sky at 30 and 40 GHz between l=50 and l=200 over approximately 600 sq. deg. The data support a rise in the angular spectrum to a maximum with $\delta T_l \approx 85 \mu$K at l=200. We also give a 2-sigma upper limit of $\delta T_l < 122 \mu$K at l=432 at 144 GHz. These results come from the first campaign of the Mobile Anisotropy Telescope (MAT) on Cerro Toco, Chile. To assist in assessing the site, we present plots of the fluctuations in atmospheric emission at 30 and 144 GHz.

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