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29 March 2024
 
  » arxiv » 0804.3634

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The White Mountain Polarimeter Telescope and an Upper Limit on CMB Polarization
Alan R. Levy ; Rodrigo Leonardi ; Markus Ansmann ; Marco Bersanelli ; Jeffery Childers ; Terrence D. Cole ; Ocleto D'Arcangelo ; G. Vietor Davis ; Philip M. Lubin ; Joshua Marvil ; Peter R. Meinhold ; Gerald Miller ; Hugh O’Neill ; Fabrizio Stavola ; Nathan C. Stebor ; Peter T. Timbie ; Maarten van der Heide ; Fabrizio Villa ; Thyrso Villela ; Brian D. Williams ; Carlos A. Wuensche ;
Date 23 Apr 2008
AbstractThe White Mountain Polarimeter (WMPol) is a dedicated ground-based microwave telescope and receiver system for observing polarization of the Cosmic Microwave Background. WMPol is located at an altitude of 3880 meters on a plateau in the White Mountains of Eastern California, USA, at the Barcroft Facility of the University of California White Mountain Research Station. Presented here is a description of the instrument and the data collected during April through October 2004. We set an upper limit on $E$-mode polarization of 14 $mumathrm{K}$ (95% confidence limit) in the multipole range $170<ell<240$. This result was obtained with 422 hours of observations of a 3 $mathrm{deg}^2$ sky area about the North Celestial Pole, using a 42 GHz polarimeter. This upper limit is consistent with $EE$ polarization predicted from a standard $Lambda$-CDM concordance model.
Source arXiv, 0804.3634
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