The 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 m on a plateau in the White Mountains of Eastern California, 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 2004 April through October. We set an upper limit on E-mode polarization of 14 μK (95% confidence limit) in the multipole range 170 < l < 240. This result was obtained with 422 hr of observations of a 3 deg2 sky area about the North Celestial Pole, using a 42 GHz polarimeter. This upper limit is consistent with EE polarization predicted from a standard ΛCDM concordance model.
The White Mountain polarimeter telescope and an upper limit on cosmic microwave background polarization / A. R. Levy, R. Leonardi, M. Ansmann, M. Bersanelli,J. Childers, T. D. Cole, O. D'Arcangelo, G. V. Davis, P. M. Lubin, J. Marvil, P. R. Meinhold, G. Miller, H. O'Neill, F. Stavola, N. C. Stebor, P. T. Timbie, M. van der Heide, F. Villa, T. Villela, B.D. Williams, C. A. Wuensche. - In: ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES. - ISSN 0067-0049. - 177:2(2008 Aug), pp. 419-430. [10.1086/588784]
The White Mountain polarimeter telescope and an upper limit on cosmic microwave background polarization
M. Bersanelli;
2008
Abstract
The 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 m on a plateau in the White Mountains of Eastern California, 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 2004 April through October. We set an upper limit on E-mode polarization of 14 μK (95% confidence limit) in the multipole range 170 < l < 240. This result was obtained with 422 hr of observations of a 3 deg2 sky area about the North Celestial Pole, using a 42 GHz polarimeter. This upper limit is consistent with EE polarization predicted from a standard ΛCDM concordance model.File | Dimensione | Formato | |
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