A degree-scale measurement of anisotropy of the cosmic background radiation

Todd Gaier, Jeffrey Schuster, Joshua Gundersen, Timothy Koch, Michael Seiffert, Peter Meinhold, Philip Lubin

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

We report on the preliminary result of a search for anisotropy in the cosmic background radiation (CBR) with a beam size of ≈ 1°.5 FWHM over a wavelength range of 8-12 mm. The system operated successfully for 500 hr at the South Pole during the 1990-1991 austral summer. The data from one region, representing 25 hr after editing, are presented here. A strong signal is present in the lower frequency channels with a spectrum unlike CBR fluctuations, and is probably due to foreground emission. The highest frequency channel has the smallest contribution from this signal and has been used to set a 95% confidence level upper limit of ΔT/T ≤ 1.4 × 10-5 for fluctuations with a Gaussian autocorrelation function at a coherence angle of 1°.2. This is significantly more sensitive than previous experiments at this angular scale.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume398
Issue number1 PART 2
StatePublished - Oct 10 1992
Externally publishedYes

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background radiation
anisotropy
editing
autocorrelation
summer
confidence
poles
low frequencies
wavelength
wavelengths
experiment

Keywords

  • Cosmology: cosmic microwave background

ASJC Scopus subject areas

  • Space and Planetary Science
  • Nuclear and High Energy Physics

Cite this

Gaier, T., Schuster, J., Gundersen, J., Koch, T., Seiffert, M., Meinhold, P., & Lubin, P. (1992). A degree-scale measurement of anisotropy of the cosmic background radiation. Astrophysical Journal, 398(1 PART 2).

A degree-scale measurement of anisotropy of the cosmic background radiation. / Gaier, Todd; Schuster, Jeffrey; Gundersen, Joshua; Koch, Timothy; Seiffert, Michael; Meinhold, Peter; Lubin, Philip.

In: Astrophysical Journal, Vol. 398, No. 1 PART 2, 10.10.1992.

Research output: Contribution to journalArticle

Gaier, T, Schuster, J, Gundersen, J, Koch, T, Seiffert, M, Meinhold, P & Lubin, P 1992, 'A degree-scale measurement of anisotropy of the cosmic background radiation', Astrophysical Journal, vol. 398, no. 1 PART 2.
Gaier T, Schuster J, Gundersen J, Koch T, Seiffert M, Meinhold P et al. A degree-scale measurement of anisotropy of the cosmic background radiation. Astrophysical Journal. 1992 Oct 10;398(1 PART 2).
Gaier, Todd ; Schuster, Jeffrey ; Gundersen, Joshua ; Koch, Timothy ; Seiffert, Michael ; Meinhold, Peter ; Lubin, Philip. / A degree-scale measurement of anisotropy of the cosmic background radiation. In: Astrophysical Journal. 1992 ; Vol. 398, No. 1 PART 2.
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