Crites, A. T., Henning, J. W., Ade, P. A. R. ![]() ![]() |
Abstract
We present measurements of E-mode polarization and temperature-E-mode correlation in the cosmic microwave background using data from the first season of observations with SPTpol, the polarization-sensitive receiver currently installed on the South Pole Telescope (SPT). The observations used in this work cover 100 {{deg }<sup>2</sup>} of sky with arcminute resolution at 150 GHz. We report the E-mode angular auto-power spectrum (EE) and the temperature-E-mode angular cross-power spectrum (TE) over the multipole range 500 〈 ℓ ≤ 5000. These power spectra improve on previous measurements in the high-ℓ (small-scale) regime. We fit the combination of the SPTpol power spectra, data from Planck, and previous SPT measurements with a six-parameter ΛCDM cosmological model. We find that the best-fit parameters are consistent with previous results. The improvement in high-ℓ sensitivity over previous measurements leads to a significant improvement in the limit on polarized point-source power: after masking sources brighter than 50 mJy in unpolarized flux at 150 GHz, we find a 95% confidence upper limit on unclustered point-source power in the EE spectrum of {{D}<sub>\ell </sub>}=\ell (\ell +1){{C}<sub>\ell </sub>}/2π \lt 0.40 μ {{K}<sup>2</sup>} at \ell =3000, indicating that future EE measurements will not be limited by power from unclustered point sources in the multipole range \ell \lt 3600, and possibly much higher in \ell .
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Physics and Astronomy |
Publisher: | American Astronomical Society |
ISSN: | 0004-637X |
Date of Acceptance: | 22 February 2015 |
Last Modified: | 10 May 2023 14:01 |
URI: | https://orca.cardiff.ac.uk/id/eprint/156751 |
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