A measurement of the angular power spectrum of the microwave background made from the high Chilean Andes

E. Torbet, M. J. Devlin, W. B. Dorwart, T. Herbig, A. D. Miller, M. R. Nolta, L. Page, J. Puchalla, 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. The data, covering roughly 600 deg2, support a rise in the angular spectrum to a maximum with δΤ1 ≈ 85 μΚ at l = 200. We also give a 2 σ upper limit of δΤ1 < 122 μΚ at l = 432 at 144 GHz. These results come from the first campaign of the Mobile Anisotropy Telescope on Cerro Toco, Chile. To assist in assessing the site, we present plots of the fluctuations in atmospheric emission at 30 and 144 GHz.

Original languageEnglish (US)
Pages (from-to)L79-L82
JournalAstrophysical Journal
Volume521
Issue number2 PART 2
DOIs
StatePublished - Aug 20 1999

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Atmospheric effects
  • Cosmic microwave background
  • Cosmology: observations

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