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18 February 2025
 
  » arxiv » astro-ph/0107013

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A Limit on the Large Angular Scale Polarization of the Cosmic Microwave Background
Brian G. Keating ; Christopher W. O’Dell ; Angelica de Oliveira-Costa ; Slade Klawikowski ; Nate Stebor ; Lucio Piccirillo ; Max Tegmark ; Peter T. Timbie ;
Date 3 Jul 2001
Journal ApJ Letters: (2001), Vol 560, L1
Subject astro-ph
Affiliation Caltech, University of Wisconsin, Madison, University of Pennsylvania, UCSB, University of Wales, Cardiff
AbstractWe present an upper limit on the polarization of the Cosmic Microwave Background at 7 degree angular scales in the frequency band between 26 and 36 GHz, produced by the POLAR experiment. The campaign produced a map of linear polarization over the R.A. range 112 degrees - 275 degrees at declination 43degrees. The model-independent upper limit on the E-mode polarization component of the CMB at angular scales l = 2 - 20 is 10 microKelvin (95% confidence). The corresponding limit for the B-mode is also 10 microKelvin. Constraining the B-mode power to be zero, the 95% confidence limit on E-mode power alone is 8 microKelvin.
Source arXiv, astro-ph/0107013
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