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First Measurements of the Polarization of the Cosmic Microwave Background Radiation at Small Angular Scales from CAPMAP

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Published 2005 January 10 © 2005. The American Astronomical Society. All rights reserved. Printed in U.S.A.
, , Citation D. Barkats et al 2005 ApJ 619 L127 DOI 10.1086/428285

1538-4357/619/2/L127

Abstract

Polarization results from the Cosmic Anisotropy Polarization MAPper (CAPMAP) experiment are reported. These are based on 433 hr, after cuts, observing a 2 deg2 patch around the north celestial pole with four 90 GHz correlation polarimeters coupled to optics defining 4' beams. The E-mode flat band-power anisotropy within l = 940 is measured as 66 μK2; the 95% confidence level upper limit for B-mode power within l = 1050 is measured as 38 μK2.

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10.1086/428285