A high-resolution map of the cosmic microwave background around the north celestial pole

Max Tegmark, Angélica De Oliveira-Costa, Marc J. Devlin, C. Barth Netterfield, Lyman Page, Edward J. Wollack

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

We present a Wiener-filtered map of the cosmic microwave background (CMB) fluctuations in a cap with 15° diameter, centered at the north celestial pole. The map is based on the 1993-1995 data from the Saskatoon (SK) experiment, with an angular resolution around 1° in the frequency range 27.6-44.1 GHz. The signal-to-noise ratio in the map is of order 2, and some individual hot and cold spots are significant at the 5 σ level. The spatial features are found to be consistent from year to year, which reinforces the conclusion that the SK results are not dominated by residual atmospheric contamination or other noncelestial signals.

Original languageEnglish (US)
Pages (from-to)L77-L80
JournalAstrophysical Journal
Volume474
Issue number2 PART II
DOIs
StatePublished - 1997

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Cosmic microwave background
  • Methods: data analysis

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