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

Citations Over TimeTop 1% of 1992 papers

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^deg^ 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 {DELTA}T/T<=1.4 x 10^-5^ for fluctuations with a Gaussian autocorrelation function at a coherence angle of 102. This is significantly more sensitive than previous experiments at this angular scale.

Related Papers

• → Reconstruction of the primordial power spectrum from CMB data(2011)27 cited
• → Mitigating foreground bias to the CMB lensing power spectrum for a CMB-HD survey(2022)13 cited
• → A NEW VIEW ON THE PROBLEM OF ANISOTROPY OF THE COSMIC BACKGROUND RADIATION(1993)6 cited
• → Cosmology with the CMB(1997)1 cited
• → Foreground Effects and the Search for Fluctuations in the CMB Radiation(1991)